General Description
The MAX16000–MAX16007 are low-voltage, quad-/hex-/
octal-voltage µP supervisors in small thin QFN and TSSOP
packages. These devices provide supervisory functions for
complex multivoltage systems. The MAX16000/
MAX16001/MAX16002 monitor four voltages, the
MAX16003/MAX16004/MAX16005 monitor six voltages,
and the MAX16006/MAX16007 monitor eight voltages.
The MAX16000/MAX16001/MAX16003/MAX16004/
MAX16006 offer independent outputs for each moni-
tored voltage. The MAX16001/MAX16002/MAX16004–
MAX16007 offer a reset output that asserts whenever
any of the monitored voltages fall below their respective
thresholds or the manual reset input is asserted. The
reset output remains asserted for the reset timeout after
all voltages are above their respective thresholds and
the manual reset input is deasserted. The minimum
reset timeout is internally set to 140ms or can be adjust-
ed with an external capacitor.
All open-drain outputs have internal 30µA pullups that
eliminate the need for external pullup resistors.
However, each output can be driven with an external
voltage up to 5.5V. Other features offered include a
manual reset input, a tolerance pin for selecting 5% or
10% input thresholds, and a margin enable function for
deasserting the outputs during margin testing.
The MAX16001/MAX16002/MAX16004–MAX16007 offer
a watchdog timer that asserts RESET or an indepen-
dent watchdog output (MAX16005) when the watchdog
timeout period (1.6s typ) is exceeded. The watchdog
timer can be disabled by leaving the input open.
These devices are offered in 12-, 16-, 20-, and 24-lead
thin QFN and 16-lead TSSOP packages. These are fully
specified from -40°C to +125°C.
Applications
Storage Equipment
Servers
Networking/Telecommunication Equipment
Multivoltage ASICs
Features
oFixed Thresholds for 5V, 3.3V, 3V, 2.5V, 1.8V,
1.5V, 1.2V, and 0.9V Systems
oAdjustable Thresholds Monitor Voltages Down to
0.4V
oOpen-Drain Outputs with Internal Pullups Reduce
the Number of External Components
oFixed 140ms (min) or Capacitor-Adjustable Reset
Timeout
oManual Reset, Margin Enable, and Tolerance
Select Inputs
oWatchdog Timer
1.6s (typ) Timeout Period
54s Startup Delay After Reset (Except MAX16005)
oIndependent Watchdog Output (MAX16005)
oRESET Output Indicates All Voltages Present
oIndependent Voltage Monitors
oGuaranteed Correct Logic State Down to VCC = 1V
oSmall (4mm x 4mm) Thin QFN Package
oTSSOP (5mm x 4.4mm) Package (MAX16005)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
________________________________________________________________
Maxim Integrated Products
1
MAX16005
GND
µP
TOL
VCC SRT
MR
IN1 MARGINVIN1
VIN2
VIN3
VIN4
VIN5
VIN6
RESET
WDI
WDO
RST
I/O
NMI
IN2
IN3
IN4
IN5
IN6
Ordering Information
Typical Operating Circuit
19-3870; Rev 5; 10/10
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Note: The “_” is a placeholder for the input voltage threshold.
See Table 1.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel, add a “T” after the “+.” Tape-and-reel are
offered in 2.5k increments.
*
EP = Exposed pad.
Ordering Information continued at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX16000_TC+ -40°C to +125°C 12 TQFN-EP*
Selector Guide appears at end of data sheet.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = 2.0V to 5.5V, TA= -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC, OUT_, IN_, RESET, WDO to GND....................-0.3V to +6V
TOL, MARGIN, MR, SRT, WDI, to GND ..........-0.3V to VCC + 0.3
Input/Output Current (RESET, MARGIN,
SRT, MR, TOL, OUT_, WDO, WDI) ..............................±20mA
Continuous Power Dissipation (TA= +70°C)
12-Pin TQFN (derate 16.9mW/°C above +70°C) ........1349mW
16-Pin TQFN (derate 16.9mW/°C above +70°C) ........1349mW
20-Pin TQFN (derate 16.9mW/°C above +70°C) ........1355mW
24-Pin TQFN (derate 16.9mW/°C above +70°C) ........1666mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ..........754mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range VCC (Note 2) 1.0 5.5 V
VCC = 3.3V, OUT_, RESET not asserted
(Note 3) 45 65
Supply Current ICC
VCC = 5V, OUT_, RESET not asserted 50 70
µA
UVLO (Undervoltage Lockout) VUVLO VCC rising 1.62 1.8 1.98 V
IN_ (See Table 1)
5V threshold, TOL = GND 4.50 4.625 4.75
5V threshold, TOL = VCC 4.25 4.375 4.50
3.3V threshold, TOL = GND 2.970 3.053 3.135
3.3V threshold, TOL = VCC 2.805 2.888 2.970
3.0V threshold, TOL = GND 2.70 2.775 2.85
3.0V threshold, TOL = VCC 2.55 2.625 2.70
2.5V threshold, TOL = GND 2.250 2.313 2.375
2.5V threshold, TOL = VCC 2.125 2.188 2.250
1.8V threshold, TOL = GND 1.62 1.665 1.71
1.8V threshold, TOL = VCC 1.53 1.575 1.62
1.5V threshold, TOL = GND 1.350 1.388 1.425
1.5V threshold, TOL = VCC 1.275 1.313 1.350
1.2V threshold, TOL = GND 1.08 1.11 1.14
1.2V threshold, TOL = VCC 1.02 1.05 1.08
0.9V threshold, TOL = GND 0.810 0.833 0.855
Threshold Voltages (IN_ Falling) VTH
0.9V threshold, TOL = VCC 0.765 0.788 0.810
V
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.0V to 5.5V, TA= -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TOL = GND 0.388 0.394 0.400
Adjustable Threshold
(IN_ Falling) VTH TOL = VCC 0.366 0.372 0.378 V
IN_ Hysteresis VTH_HYS IN_ rising 0.5 % VTH
Fixed thresholds 3 16 µA
IN_ Input Current Adjustable thresholds -100 +100 nA
RESET
SRT = VCC 140 200 280
CSRT = 1500pF (Note 4) 2.43 3.09 3.92
CSRT = 100pF 0.206
ms
Reset Timeout tRP
CSRT = open 50 µs
SRT Ramp Current ISRT VSRT = 0V 460 600 740 nA
SRT Threshold 1.173 1.235 1.293 V
SRT Hysteresis 100 mV
IN_ to Reset Delay tRD IN_ falling 20 µs
V
C C
= 3.3V , IS IN K = 10m A, RE S E T asser ted 0.30
VCC = 2.5V, ISINK = 6mA, RE S E T asser ted 0.30
RESET Output-Voltage Low VOL
VCC = 1.2V, ISINK = 50µA, RE S E T asser ted 0.30
V
RESET Output-Voltage High VOH VCC ≥ 2.0V, ISOURCE = 6µA, RESET
deasserted
0.8 x
VCC V
MR Input-Voltage Low VIL 0.3 x
VCC V
MR Input-Voltage High VIH 0.7 x
VCC V
MR Minimum Pulse Width 1µs
MR Glitch Rejection 100 ns
MR to Reset Delay 200 ns
MR Pullup Resistance Pulled up to VCC 12 20 28 kΩ
OUTPUTS (OUT_ )
VCC = 3.3V, ISINK = 2mA 0.30
OUT_ Output-Voltage Low VOL VCC = 2.5V, ISINK = 1.2mA 0.30 V
OUT_ Output-Voltage High VOH VCC ≥ 2.0V, ISOURCE = 6µA 0.8 x
VCC V
IN_ to OUT_ Propagation Delay tD(VTH + 100mV) to (VTH - 100mV) 20 µs
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
4 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
REFERENCE OUTPUT (MAX16005 Only)
Reference Short-Circuit Current Shorted to GND 0.8 mA
Reference Output Accuracy VREF No load 1.200 1.235 1.270 V
Line Regulation 0.005 % / V
Reference Load Regulation Sourcing, 0 ≤ IREF ≤ 40µA 10 Ω
WATCHDOG TIMER (MAX16001/MAX16002/MAX16004–MAX16007)
WDI Input-Voltage Low VIL 0.3 x
VCC V
WDI Input-Voltage High VIH 0.7 x
VCC V
WDI Pulse Width (Note 5) 50 ns
Watchdog Timeout Period tWDI 1.12 1.6 2.40 s
Watchdog Startup Period MAX16001/2/4/6/7 35 54 72 s
Watchdog Input Current VWDI = 0 to VCC (Note 5) -1 +1 µA
VCC = 3.3V, ISINK = 2mA 0.30
WDO Output-Voltage Low
(MAX16005 Only) VOL VCC = 2.5V, ISINK = 1.2mA 0.30 V
WDO Output-Voltage High
(MAX16005 Only) VOH VCC ≥ 2.0V, ISOURCE = 6µA, WDO
deasserted
0.8 x
VCC V
DIGITAL LOGIC
TOL Input-Voltage Low VIL 0.3 x
VCC V
TOL Input-Voltage High VIH 0.7 x
VCC V
TOL Input Current TOL = VCC 100 nA
MARGIN Input-Voltage Low VIL 0.3 x
VCC V
MARGIN Input-Voltage High VIH 0.7 x
VCC V
MARGIN Pullup Resistance Pulled up to VCC 12 20 28 kΩ
MARGIN Delay Time tMD Rising or falling (Note 6) 50 µs
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.0V to 5.5V, TA= -40°C to +125°C, unless otherwise specified. Typical values are at VCC = 3.3V, TA= +25°C). (Note 1)
Note 1: Devices are tested at TA= +25°C and guaranteed by design for TA= TMIN to TMAX.
Note 2: The outputs are guaranteed to be in the correct logic state down to VCC = 1V.
Note 3: Measured with WDI, MARGIN, and MR unconnected.
Note 4: The minimum and maximum specifications for this parameter are guaranteed by using the worst case of the SRT ramp cur-
rent and SRT threshold specifications.
Note 5: Guaranteed by design and not production tested.
Note 6: Amount of time required for logic to lock/unlock outputs from margin testing.
Typical Operating Characteristics
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
MAX16000 toc01
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
30
35
40
45
50
55
60
WDI, MARGIN, AND MR UNCONNECTED
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
MAX16000 toc02
-40 -25 -10 5 20 35 50 65 80 95 110 125
30
35
40
45
50
55
60
WDI, MARGIN, AND MR UNCONNECTED
VCC = 2.5V
VCC = 3.3V
VCC = 5V
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
1.000
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
1.000
1.003
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
1.000
1.003
1.005
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
1.000
1.003
1.005
1.008
NORMALIZED THRESHOLD
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
NORMALIZED THRESHOLD
MAX16000 toc03
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.990
0.993
0.995
0.998
1.000
1.003
1.005
1.008
1.010
NORMALIZED THRESHOLD
vs. TEMPERATURE
TEMPERATURE (°C)
NORMALIZED THRESHOLD
MAX16000 toc04
-40 -25 -10 5 20 35 50 65 80 95 110 125
0.995
0.996
0.997
0.998
0.999
1.000
1.001
OUTPUT VOLTAGE vs. SINK CURRENT
SINK CURRENT (mA)
VOUT_ (mV)
MAX16000 toc05
012345678
0
25
50
75
100
OUT_ LOW
OUTPUT VOLTAGE vs. SOURCE CURRENT
SOURCE CURRENT (µA)
VCC - VOUT_ (mV)
MAX16000 toc06
0 5 10 15 20 25 30
0
200
400
600
800
1000
OUT_ HIGH
RESET TIMEOUT PERIOD
vs. TEMPERATURE
TEMPERATURE (°C)
RESET TIMEOUT PERIOD (ms)
MAX16000 toc08
-40 -25 -10 5 20 35 50 65 80 95 110 125
190
191
192
193
194
195
196
197
198
1 10 100 1000
MAXIMUM TRANSIENT DURATION
vs. INPUT OVERDRIVE
MAX16000 toc07
INPUT OVERDRIVE (mV)
MAXIMUM TRANSIENT DURATION (µs)
600
0
100
200
300
400
500
OUTPUT GOES LOW
ABOVE THIS LINE
RESET TIMEOUT DELAY
MAX16000 toc09
OUT1
2V/div
IN1
5V/div
40ms/div
RESET
2V/div
SRT = VCC
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
1000
0.01 0.1 1 10 100 1000
100
10
1
0.1
0.01
RESET TIMEOUT PERIOD
vs. CSRT
MAX16000 toc10
CSRT (nF)
tRP (ms)
WATCHDOG TIMEOUT PERIOD
vs. TEMPERATURE
TEMPERATURE (°C)
WATCHDOG TIMEOUT PERIOD (s)
MAX16000 toc11
-40-25-105 203550658095110125
1.50
1.51
1.52
1.53
1.54
1.55
1.56
1.57
1.58
1.59
1.60
MARGIN ENABLE FUNCTION
MAX16000 toc12
OUT
2V/
MA
2V/
100µs/div
RES
2V/
OUT_ AND RESET ARE
BELOW RESPECTIVE
THRESHOLDS
MARGIN DISABLE FUNCTION
MAX16000 toc13
OUT_
2V/div
MARGIN
2V/div
100µs/div
RESET
2V/div
OUT_ AND RESET ARE BELOW RESPECTIVE
THRESHOLDS
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
REFERENCE VOLTAGE (V)
MAX16000 toc15
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
1.220
1.225
1.230
1.235
1.240
1.245
1.250
1.255
1.260
MAX16005
REFERENCE VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
MAX16000 toc16
-40 -25 -10 5 20 35 50 65 80 95 110 125
1.20
1.21
1.22
1.23
1.24
1.25
1.26
1.27
1.28
MAX16005
TRANSIENT DURATION
vs. VCC TRANSIENT MAGNITUDE
MAX16000 toc17
TRANSIENT MAGNITUDE (VCC - V) (mV)
MAXIMUM TRANSIENT DURATION (µs)
1
2
3
4
5
6
7
8
9
10
0
100 1000
RESET, OUT_ASSERT
ABOVE THIS LINE
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
6 _______________________________________________________________________________________
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
_______________________________________________________________________________________ 7
Pin Description (MAX16000/MAX16001/MAX16002)
PIN
MAX16000
MAX16001
MAX16002
NAME FUNCTION
1 1 1 IN3 Monitored Input Voltage 3. See Table 1 for the input voltage threshold.
2 2 2 IN4 Monitored Input Voltage 4. See Table 1 for the input voltage threshold.
3 4 4 GND Ground
455 V
CC Unmonitored Power-Supply Input
5 6 — OUT3 O utp ut 3. When the vol tag e at IN 3 fal l s b el ow i ts thr eshol d , OU T3 g oes l ow and stays l ow unti l the
vol tag e at IN 3 exceed s i ts thr eshol d . The op en- d r ai n outp ut has a 30µA i nter nal p ul l up to V
C C
.
6 7 — OUT4 O utp ut 4. When the vol tag e at IN 4 fal l s b el ow i ts thr eshol d , OU T4 g oes l ow and stays l ow unti l the
vol tag e at IN 4 exceed s i ts thr eshol d . The op en- d r ai n outp ut has a 30µA i nter nal p ul l up to V
C C
.
7108 MARGIN Active-Low Manual Deassert Input. Pull MARGIN low to deassert all outputs (go into high state),
regardless of the voltage at any monitored input.
8 11 — OUT2 O utp ut 2. When the vol tag e at IN 2 fal l s b el ow i ts thr eshol d , OU T2 g oes l ow and stays l ow unti l the
vol tag e at IN 2 exceed s i ts thr eshol d . The op en- d r ai n outp ut has a 30µA i nter nal p ul l up to V
C C
.
9 12 — OUT1 O utp ut 1. When the vol tag e at IN 1 fal l s b el ow i ts thr eshol d , OU T1 g oes l ow and stays l ow unti l the
vol tag e at IN 1 exceed s i ts thr eshol d . The op en- d r ai n outp ut has a 30µA i nter nal p ul l up to V
C C
.
10 14 10 IN1 Monitored Input Voltage 1. See Table 1 for the input voltage threshold.
11 15 11 IN2 Monitored Input Voltage 2. See Table 1 for the input voltage threshold.
12 16 12 TOL Threshold Tolerance Input. Connect TOL to GND to select 5% threshold tolerance. Connect TOL
to VCC to select 10% threshold tolerance.
— 3 3 WDI
Watchdog Timer Input. If WDI remains low or high for longer than the watchdog timeout period,
RESET is asserted. The timer clears whenever a reset is asserted or a rising or falling edge on
WDI is detected. The watchdog timer enters a startup period that allows 54s for the first
transition to occur before a reset. Leave WDI unconnected to disable the watchdog timer. The
WDI open-state detector uses a small 400nA current. Therefore, do not connect WDI to anything
that will source or sink more than 200nA. Note that the leakage current specification for most
three-state drivers exceeds 200nA.
—8 6 MR Active-Low Manual Reset Input. Pull MR low to assert RESET low. RESET remains low for the
reset timeout period after MR is deasserted. MR is pulled up to VCC through a 20kΩ resistor.
— 9 7 SRT
Set Reset Timeout Input. Connect a capacitor from SRT to GND to set the reset timeout period.
The reset timeout period can be calculated as follows:
Reset Timeout (s) = 2.06 x 106 (Ω) x CSRT (F). For the internal timeout period of 140ms (min),
connect SRT to VCC.
—13 9 RESET
Active-Low Reset Output. RESET asserts low when any of the monitored voltages falls below its
respective threshold or MR is asserted. RESET remains asserted for the reset timeout period
after all monitored voltages exceed their respective thresholds and MR is deasserted. This
open-drain output has a 30µA internal pullup.
—— — EP
Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to provide a
low thermal resistance path from the IC junction to the PCB. Do not use as the electrical
connection to GND.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
8 _______________________________________________________________________________________
Pin Description (MAX16003/MAX16004/MAX16005)
PIN
MAX16003
MAX16004
MAX16005
TSSOP
MAX16005
TQFN
NAME FUNCTION
1 1 3 1 IN4 Monitored Input Voltage 4. See Table 1 for the input voltage threshold.
2 2 4 2 IN5 Monitored Input Voltage 5. See Table 1 for the input voltage threshold.
3 3 5 3 IN6 Monitored Input Voltage 6. See Table 1 for the input voltage threshold.
4 5 7 5 GND Ground
568 6 V
CC Unmonitored Power-Supply Input
6 7 — — OUT4
Output 4. When the voltage at IN4 falls below its threshold, OUT4 goes low and stays low
until the voltage at IN4 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
7 8 — — OUT5
Output 5. When the voltage at IN5 falls below its threshold, OUT5 goes low and stays low
until the voltage at IN5 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
8 9 — — OUT6
Output 6. When the voltage at IN6 falls below its threshold, OUT6 goes low and stays low
until the voltage at IN6 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
9121311MARGIN Manual Deassert Input. Pull MARGIN low to deassert all outputs (go into high state),
regardless of the voltage at any monitored input.
10 13 — — OUT3
Output 3. When the voltage at IN3 falls below its threshold, OUT3 goes low and stays low
until the voltage at IN3 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
11 14 — — OUT2
Output 2. When the voltage at IN2 falls below its threshold, OUT2 goes low and stays low
until the voltage at IN2 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
12 15 — — OUT1
Output 1. When the voltage at IN1 falls below its threshold, OUT1 goes low and stays low
until the voltage at IN1 exceeds its threshold. The open-drain output has a 30µA internal
pullup to VCC.
13 17 15 13 IN1 Monitored Input Voltage 1. See Table 1 for the input voltage threshold.
14 18 16 14 IN2 Monitored Input Voltage 2. See Table 1 for the input voltage threshold.
15 19 1 15 IN3 Monitored Input Voltage 3. See Table 1 for the input voltage threshold.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
_______________________________________________________________________________________ 9
PIN
MAX16003
MAX16004
MAX16005
TSSOP
MAX16005
TQFN
NAME FUNCTION
16 20 2 16 TOL Threshold Tolerance Input. Connect TOL to GND to select 5% threshold tolerance.
Connect TOL to VCC to select 10% threshold tolerance.
— 4 6 4 WDI
Watchdog Timer Input.
MAX16004: If WDI remains low or high for longer than the watchdog timeout period,
RESET is asserted and the timer is cleared. The timer also clears whenever a reset is
asserted or a rising or falling edge on WDI is detected. The watchdog timer enters a
startup period that allows 54s for the first transition to occur before a reset. Leave WDI
unconnected to disable the watchdog timer.
MAX16005: If WDI remains low or high for longer than the watchdog timeout period,
WDO is asserted. The timer clears whenever a rising or falling edge on WDI is detected.
Leave WDI unconnected to disable the watchdog timer. The MAX16005 does not have a
startup period.
MAX16004/MAX16005: The WDI open-state detector uses a small 100nA current.
Therefore, do not connect WDI to anything that will source or sink more than 50nA. Note
that the leakage current specification for most three-state drivers exceeds 50nA.
—1011 9 MR
Active-Low Manual Reset Input. Pull MR low to assert RESET low. RESET remains low for
the reset timeout period after MR is deasserted. MR is pulled up to VCC through a 20kΩ
resistor.
— 11 12 10 SRT
Set Reset Timeout Input. Connect a capacitor from SRT to GND to set the reset timeout
period. The reset timeout period can be calculated as follows:
Reset Timeout (s) = 2.06 x 106 (Ω) x CSRT (F). For the internal timeout period of 140ms
(min), connect SRT to VCC.
—1614 12 RESET
Active-Low Reset Output. RESET asserts low when any of the monitored voltages falls
below its respective threshold or MR is asserted. RESET remains asserted for the reset
timeout period after all monitored voltages exceed their respective thresholds and MR is
deasserted. This open-drain output has a 30µA internal pullup.
— — 9 7 REF Reference Output. The reference output voltage of 1.23V can source up to 40µA.
— — 10 8 WDO
Active-Low Watchdog Output. WDO asserts and stays low whenever any of the IN_ inputs
fall below their respective thresholds. WDO deasserts without a timeout delay when all
the IN_ inputs rise above their thresholds. When all the IN_ inputs rise above their
thresholds, WDO asserts low whenever the watchdog timer times out. WDO deasserts
after a valid WDI transition or if MR is pulled low. The watchdog timer begins counting
after the reset timeout period once MR goes high. Pull MARGIN low to deassert WDO.
——— — EP
Exposed Pad. EP is internally connected to GND. Connect EP to the ground plane to
provide a low thermal resistance path from the IC junction to the PCB. Do not use as the
electrical connection to GND.
Pin Description (MAX16003/MAX16004/MAX16005) (continued)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
10 ______________________________________________________________________________________
Pin Description (MAX16006/MAX16007)
PIN
MAX16006
MAX16007
NAME FUNCTION
1 1 IN5 Monitored Input Voltage 5. See Table 1 for the input voltage threshold.
2 2 IN6 Monitored Input Voltage 6. See Table 1 for the input voltage threshold.
3 3 IN7 Monitored Input Voltage 7. See Table 1 for the input voltage threshold.
4 4 IN8 Monitored Input Voltage 8. See Table 1 for the input voltage threshold.
5 5 WDI
Watchdog Timer Input. If WDI remains low or high for longer than the watchdog timeout period,
RESET is asserted and the timer is cleared. The timer also clears whenever a reset is asserted or a
rising or falling edge on WDI is detected. The watchdog timer enters a startup period that allows 54s
for the first transition to occur before a reset. Leave WDI unconnected to disable the watchdog timer.
The WDI open-state detector uses a small 400nA current. Therefore, do not connect WDI to anything
that will source or sink more than 200nA. Note that the leakage current specification for most three-
state drivers exceeds 200nA.
6 6 GND Ground
77 V
CC Unmonitored Power-Supply Input
8 — OUT5 Output 5. When the voltage at IN5 falls below its threshold, OUT5 goes low and stays low until the
voltage at IN5 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
9 — OUT6 Output 6. When the voltage at IN6 falls below its threshold, OUT6 goes low and stays low until the
voltage at IN6 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
10 — OUT7 Output 7. When the voltage at IN7 falls below its threshold, OUT7 goes low and stays low until the
voltage at IN7 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
11 — OUT8 Output 8. When the voltage at IN8 falls below its threshold, OUT8 goes low and stays low until the
voltage at IN8 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
12 10 MR Active-Low Manual Reset Input. Pull MR low to assert RESET low. RESET remains low for the reset
timeout period after MR is deasserted. MR is pulled up to VCC through a 20kΩ resistor.
13 11 SRT
Set Reset Timeout Input. Connect a capacitor from SRT to GND to set the reset timeout period. The
reset timeout period can be calculated as follows:
Reset Timeout (s) = 2.06 x 10
6
(Ω) x CSRT (F). For the internal timeout period of 140ms (min), connect
SRT to VCC.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 11
Pin Description (MAX16006/MAX16007) (continued)
PIN
MAX16006
MAX16007
NAME FUNCTION
14 12 MARGIN Margin Disable Input. Pull MARGIN low to deassert all outputs (go into high state), regardless of the
voltage at any monitored input.
15 — OUT4 Output 4. When the voltage at IN4 falls below its threshold, OUT4 goes low and stays low until the
voltage at IN4 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
16 — OUT3 Output 3. When the voltage at IN3 falls below its threshold, OUT3 goes low and stays low until the
voltage at IN3 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
17 — OUT2 Output 2. When the voltage at IN2 falls below its threshold, OUT2 goes low and stays low until the
voltage at IN2 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
18 — OUT1 Output 1. When the voltage at IN1 falls below its threshold, OUT1 goes low and stays low until the
voltage at IN1 exceeds its threshold. The open-drain output has a 30µA internal pullup to VCC.
19 15 RESET
Active-Low Reset Output. RESET asserts low when any of the monitored voltages falls below its
respective threshold or MR is asserted. RESET remains asserted for the reset timeout period after all
monitored voltages exceed their respective thresholds and MR is deasserted. This open-drain output
has a 30µA internal pullup.
20 16 IN1 Monitored Input Voltage 1. See Table 1 for the input voltage threshold.
21 17 IN2 Monitored Input Voltage 2. See Table 1 for the input voltage threshold.
22 18 IN3 Monitored Input Voltage 3. See Table 1 for the input voltage threshold.
23 19 IN4 Monitored Input Voltage 4. See Table 1 for the input voltage threshold.
24 20 TOL Threshold Tolerance Input. Connect TOL to GND to select 5% threshold tolerance. Connect TOL to
VCC to select 10% threshold tolerance.
—8, 9,
13, 14 N.C. Not Internally Connected
—— EPE xp osed P ad . E P i s i nter nal l y connected to GN D . C onnect E P to the g r ound p l ane to p r ovi d e a l ow ther m al
r esi stance p ath fr om the IC j uncti on to the P C B. D o not use as the el ectr i cal connecti on to G N D .
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
12 ______________________________________________________________________________________
Table 1. Input-Voltage-Threshold Selector
PART IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8
MAX16000A 3.3 2.5 ADJ 1.8 — — — —
MAX16000B 3.3 ADJ ADJ 1.8 — — — —
MAX16000C ADJ 2.5 ADJ 1.8 — — — —
MAX16000D 3.3 2.5 ADJ ADJ — — — —
MAX16000E ADJ ADJ ADJ ADJ — — — —
MAX16001A 3.3 2.5 ADJ 1.8 — — — —
MAX16001B 3.3 ADJ ADJ 1.8 — — — —
MAX16001C ADJ 2.5 ADJ 1.8 — — — —
MAX16001D 3.3 2.5 ADJ ADJ — — — —
MAX16001E ADJ ADJ ADJ ADJ — — — —
MAX16002A 3.3 2.5 ADJ 1.8 — — — —
MAX16002B 3.3 ADJ ADJ 1.8 — — — —
MAX16002C ADJ 2.5 ADJ 1.8 — — — —
MAX16002D 3.3 2.5 ADJ ADJ — — — —
MAX16002E ADJ ADJ ADJ ADJ — — — —
MAX16003A 3.3 2.5 ADJ 1.8 ADJ ADJ — —
MAX16003B 3.3 ADJ ADJ 1.8 ADJ ADJ — —
MAX16003C 3.3 2.5 ADJ ADJ ADJ ADJ — —
MAX16003D ADJ 2.5 ADJ 1.8 ADJ ADJ — —
MAX16003E ADJ ADJ ADJ ADJ ADJ ADJ — —
MAX16004A 3.3 2.5 ADJ 1.8 ADJ ADJ — —
MAX16004B 3.3 ADJ ADJ 1.8 ADJ ADJ — —
MAX16004C 3.3 2.5 ADJ ADJ ADJ ADJ — —
MAX16004D ADJ 2.5 ADJ 1.8 ADJ ADJ — —
MAX16004E ADJ ADJ ADJ ADJ ADJ ADJ — —
MAX16005A 3.3 2.5 ADJ 1.8 ADJ ADJ — —
MAX16005B 3.3 ADJ ADJ 1.8 ADJ ADJ — —
MAX16005C 3.3 2.5 ADJ ADJ ADJ ADJ — —
MAX16005D ADJ 2.5 ADJ 1.8 ADJ ADJ — —
MAX16005E ADJ ADJ ADJ ADJ ADJ ADJ — —
MAX16006A 3.3 2.5 ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16006B 3.3 ADJ ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16006C 3.3 2.5 ADJ ADJ ADJ ADJ ADJ ADJ
MAX16006D ADJ 2.5 ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16006E ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ
MAX16006F 5.0 3.3 3.0 2.5 1.8 1.5 1.2 0.9
MAX16007A 3.3 2.5 ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16007B 3.3 ADJ ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16007C 3.3 2.5 ADJ ADJ ADJ ADJ ADJ ADJ
MAX16007D ADJ 2.5 ADJ 1.8 ADJ ADJ ADJ ADJ
MAX16007E ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ
Note: Other fixed thresholds may be available. Contact factory for availability.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 13
MAX16000
REFERENCE UNDERVOLTAGE LOCKOUT
VCC
IN1
OUT1
OUT2
OUT3
OUT4
MARGIN
IN2
IN3
IN4
TOL
VCC
RESET
CIRCUIT
OUTPUT
DRIVER
EN
VCC
VCC
VCC
Figure 1. MAX16000D Functional Diagram
Functional Diagrams
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
14 ______________________________________________________________________________________
MAX16001/
MAX16002
REFERENCE UNDERVOLTAGE LOCKOUT
VCC
IN1
(OUT1)
RESET
(OUT2)
(OUT3)
(OUT4)
MARGIN
IN2
IN3
IN4
TOL
VCC
RESET CIRCUIT
WATCHDOG
TIMER CIRCUIT
OUTPUT
DRIVER
EN
MR SRTWDI
TIMING
VCC
VCC
VCC
( ) MAX16001 ONLY
Figure 2. MAX16001D/MAX16002D Functional Diagram
Functional Diagrams (continued)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 15
MAX16003/
MAX16004
REFERENCE UNDERVOLTAGE LOCKOUT
VCC
IN1
OUT1
(RESET)
OUT2
OUT3
OUT6
MARGIN
( ) MAX16004 ONLY
IN2
IN3
IN4
TOL
VCC
RESET CIRCUIT
WATCHDOG
TIMER CIRCUIT
OUTPUT
DRIVER
EN
(MR) (SRT)(WDI)
TIMING
VCC
VCC
VCC
IN5
IN6
OUT4
OUT5
Figure 3. MAX16003C/MAX16004C Functional Diagram
Functional Diagrams (continued)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
16 ______________________________________________________________________________________
MAX16005
REFERENCE UNDERVOLTAGE LOCKOUT
VCC
IN1
RESET
MARGINREF
IN2
IN3
IN4
TOL
VCC
RESET CIRCUIT
WATCHDOG
TIMER CIRCUIT
OUTPUT
DRIVER
EN
MR SRTWDIWDO
TIMING
VCC
VCC
VCC
IN5
IN6
Figure 4. MAX16005C Functional Diagram
Functional Diagrams (continued)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 17
MAX16006/
MAX16007
REFERENCE UNDERVOLTAGE LOCKOUT
VCC
IN1
MARGIN
( ) MAX16006 ONLY
IN2
IN3
IN4
TOL
VCC
RESET CIRCUIT
WATCHDOG
TIMER CIRCUIT
OUTPUT
DRIVER
EN
MR SRTWDI
TIMING
VCC
VCC
IN5
IN6
IN7
IN8
(OUT1)
RESET
(OUT2)
(OUT3)
OUT8
VCC
(OUT4)
(OUT5)
(OUT6)
(OUT7)
Figure 5. MAX16006C/MAX16007C Functional Diagram
Functional Diagrams (continued)
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
18 ______________________________________________________________________________________
Detailed Description
The MAX16000–MAX16007 are low-voltage, quad-/hex-/
octal-voltage µP supervisors in small thin QFN and TSSOP
packages. These devices provide supervisory functions
for complex multivoltage systems. The MAX16000/
MAX16001/MAX16002 monitor four voltages, the
MAX16003/MAX16004/MAX16005 monitor six voltages,
and the MAX16006/MAX16007 monitor eight voltages.
The MAX16000/MAX16001/MAX16003/MAX16004/
MAX16006 offer independent outputs for each moni-
tored voltage. The MAX16001/MAX16002/MAX16004–
MAX16007 offer a reset output that asserts whenever
any of the monitored voltages fall below their respective
thresholds or the manual reset input is asserted. The
reset output remains asserted for the reset timeout after
all voltages are above their respective thresholds and
the manual reset input is deasserted. The minimum
reset timeout is internally set to 140ms or can be
adjusted with an external capacitor.
All open-drain outputs have internal 30µA pullups that
eliminate the need for external pullup resistors.
However, each output can be driven with an external
voltage up to 5.5V. Other features offered include a
manual reset input, a tolerance pin for selecting 5% or
10% input thresholds, and a margin enable function for
deasserting the outputs during margin testing.
The MAX16001/MAX16002/MAX16004–MAX16007 offer
a watchdog timer that asserts RESET or an indepen-
dent watchdog output (MAX16005) when the watchdog
timeout period (1.6s typ) is exceeded. The watchdog
timer can be disabled by leaving input open.
Applications Information
Undervoltage-Detection Circuit
The open-drain outputs of the MAX16000–MAX16007
can be configured to detect an undervoltage condition.
Figure 6 shows a configuration where an LED turns on
when the comparator output is low, indicating an
undervoltage condition. These devices can also be
used in applications such as system supervisory moni-
toring, multivoltage level detection, and VCC bar-graph
monitoring (Figure 7).
Tolerance (TOL)
The MAX16000–MAX16007 feature a pin-selectable
threshold tolerance. Connect TOL to GND to select 5%
threshold tolerance. Connect TOL to VCC to select 10%
threshold tolerance.
Window Detection
A window detector circuit uses two auxiliary inputs in
the configuration shown in Figure 8. External resistors
set the two threshold voltages of the window detector
circuit. External logic gates create the OUT signal. The
window detection width is the difference between the
threshold voltages (Figure 9).
MAX16000
MAX16001
GND
VCC
IN1V1
5V
V2
V3
V4 OUT1
IN2
IN3
IN4
OUT2
OUT3
OUT4
Figure 6. Quad Undervoltage Detector with LED Indicators
MAX16000
MAX16001
GND
D2
VCC
IN1
VIN(5V)
5V
OUT1
IN2
IN3
IN4
OUT2
OUT3
OUT4
D1
D3
D4
Figure 7. VCC Bar-Graph Monitoring
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 19
Adjustable Input
These devices offer several monitor options with
adjustable input thresholds (see Table 1). The threshold
voltage at each adjustable IN_ input is typically 0.394V
(TOL = GND) or 0.372 (TOL = VCC). To monitor a voltage
VINTH, connect a resistive-divider network to the circuit as
shown in Figure 10.
VINTH = VTH ((R1 / R2) + 1)
R1 = R2 ((VINTH / VTH) - 1)
Large resistors can be used to minimize current through
the external resistors. For greater accuracy, use lower-
value resistors.
Unused Inputs
Connect any unused IN_ inputs to a voltage above its
threshold.
OUT_
Outputs
(MAX16000/MAX16001/MAX16003/
MAX16004/MAX16006)
The OUT_ outputs go low when their respective IN_
inputs drop below their specified thresholds. The output
is open drain with a 30µA internal pullup to VCC. For
many applications, no external pullup resistor is required
to interface with other logic devices. An external pullup
resistor to any voltage from 0 to 5.5V overrides the inter-
nal pullup if interfacing to different logic supply voltages.
Internal circuitry prevents reverse current flow from the
external pullup voltage to VCC (Figure 11).
MAX16000
MAX16001
GND
VCC
IN1
5V
R2
INPUT
R1
OUT1
IN2
IN3
OUT
IN4
OUT2
OUT3
OUT4
R4
R3
VTH1 = (1 + R1) (VTH + VTH_HYS)
R2
VTH4 = (1 + R3) VTH
R4
Figure 8. Window Detection
R1
VINTH
VTH
R2
R1 = R2(VINTH )
VTH
- 1
Figure 10. Setting the Adjustable Input
∆V TH
V TH4
V TH1
OUT
OUT4
OUT1
Figure 9. Output Response of Window Detector Circuit
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
20 ______________________________________________________________________________________
RESET
Output (MAX16001/MAX16002/
MAX16004–MAX16007)
RESET asserts low when any of the monitored voltages
fall below their respective thresholds or MR is asserted.
RESET remains asserted for the reset timeout period
after all monitored voltages exceed their respective
thresholds and MR is deasserted (see Figure 12). This
open-drain output has a 30µA internal pullup. An exter-
nal pullup resistor to any voltage from 0 to 5.5V overrides
the internal pullup if interfacing to different logic supply
voltages. Internal circuitry prevents reverse current flow
from the external pullup voltage to VCC (Figure 11).
WDO
(MAX16005 Only)
WDO asserts and stays low whenever any of the IN_
inputs fall below their respective thresholds. WDO
deasserts without a timeout delay when all the IN_
inputs rise above their thresholds. When all the IN_
inputs rise above their thresholds, WDO asserts low
whenever the watchdog timer times out. WDO
deasserts after a valid WDI transition or if MR is pulled
low. The watchdog timer begins counting after the reset
timeout period once MR goes high. Pull MARGIN low to
deassert WDO regardless of any other condition. The
watchdog timer continues to run when MARGIN is low
and if a timeout occurs. WDO will assert MR after
MARGIN is deasserted. This open-drain output has a
30µA internal pullup. An external pullup resistor to any
voltage from 0 to 5.5V overrides the internal pullup if
interfacing to different logic supply voltages. Internal cir-
cuitry prevents reverse current flow from the external
pullup voltage to VCC (Figure 11).
MAX16001/
MAX16002/
MAX16004–MAX16007
GND
VCC
GND
RESET
VCC
5V
OUT_
VCC = 3.3V
100kΩ
Figure 11. Interfacing to a Different Logic Supply Voltage
IN_
10%
90%
10%
90%
RESET
OUT_
VTH_
tRP
tD
tD
tRD
VTH_
Figure 12. Output Timing Diagram
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 21
RESET
WDO
WDI
tRP
t<tWD t<tWD t<tWD
tWD
tRP
VTH
VTH + VTH_HYST
VTH + VTH_HYST
VIN
Figure 13. WDO Timing Related to VTH and tRP
MARGIN
RESET
INTERNAL
RESET
SIGNAL
tRP tRP
tWD
VTH
VTH + VTH_HYST
VTH + VTH_HYST
VIN
Figure 14. Margin Output Disable (MARGIN) Affect on RESET within tRP
Reset Timeout Capacitor
The reset timeout period can be adjusted to accommo-
date a variety of µP applications from 50µs to 1.12s.
Adjust the reset timeout period (tRP) by connecting a
capacitor (CSRT) between SRT and GND. Calculate the
reset timeout capacitor as follows:
Connect SRT to VCC for a factory-programmed reset
timeout of 140ms (min).
Manual Reset Input (MR)
(MAX16001/MAX16002/
MAX16004–MAX16007)
Many µP-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic-low on MR
asserts RESET low. RESET remains asserted while MR
is low, and during the reset timeout period (140ms min)
after MR returns high. The MR input has an internal
20kΩpullup resistor to VCC, so it can be left uncon-
nected if not used. MR can be driven with TTL or
CMOS-logic levels, or with open-drain/collector out-
puts. Connect a normally open momentary switch from
MR to GND to create a manual reset function. External
debounce circuitry is not required. If MR is driven from
long cables or if the device is used in a noisy environ-
ment, connecting a 0.1µF capacitor from MR to GND
provides additional noise immunity.
Margin Output Disable (
MARGIN
)
MARGIN allows system-level testing while power sup-
plies are adjusted from their nominal voltages. Drive
MARGIN low to force RESET, WDO, and OUT_ high,
regardless of the voltage at any monitored input. The
state of each output does not change while MARGIN =
GND. The watchdog timer continues to run when
MARGIN is low, and if a timeout occurs, WDO/RESET
will assert tMD after MARGIN is deasserted.
The MARGIN input is internally pulled up to VCC. Leave
MARGIN unconnected or connect to VCC if unused.
Power-Supply Bypassing
The MAX16000–MAX16007 operate from a 2.0V to 5.5V
supply. An undervoltage lockout ensures that the out-
puts are in the correct states when the UVLO is exceed-
ed. In noisy applications, bypass VCC to ground with a
0.1µF capacitor as close to the device as possible. The
additional capacitor improves transient immunity. For
VCC transients with high slew rates, place an RC low-
pass filter in front of VCC, where R can be up to 100Ω.
CF
tsxI
V
SRT RP SRT
TH SRT
() ()
_
=
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
22 ______________________________________________________________________________________
MARGIN
RESET
INTERNAL
RESET
SIGNAL
tRP tRP
VTH
VTH + VTH_HYST
VTH + VTH_HYST
VIN
Figure 15. Margin Output Disable (MARGIN) Affect on RESET Outside tRP
MAX16000–MAX16007
Pin Configurations
12
11
10
4
5
IN4
GND
6
IN3
OUT2
MARGIN
OUT1
12
IN2
3
987
TOL +
+
OUT4
OUT3
VCC
MAX16000
IN1
THIN QFN
(4mm x 4mm)
TOP VIEW
12
11
10
4
5
IN4
WDI
6
IN3
SRT
MARGIN
RESET
12
IN2
3
987
TOL +
MR
GND
VCC
MAX16002
IN1
THIN QFN
(4mm x 4mm)
TOP VIEW
15
16
14
13
6
5
7
IN4
GND
8
IN3
OUT2
SRT
OUT1
12
IN1
4
12 11 9
IN2
TOL
MR
OUT4
OUT3
VCC
MAX16001
WDI MARGIN
3
10
RESET
THIN QFN
(4mm x 4mm)
TOP VIEW
+
15
16
14
13
6
5
7
IN5
GND
8
IN4
OUT2
OUT1
12
IN2
4
12 11 9
IN3
TOL
OUT5
OUT4
VCC
MAX16003
IN6
MARGIN
3
10
IN1 OUT6
THIN QFN
(4mm x 4mm)
TOP VIEW
OUT3
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 23
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
24 ______________________________________________________________________________________
Pin Configurations (continued)
+
+ +
15
16
14
13
6
5
7
IN5
WDI
8
IN4
MARGIN
MR
RESET
12
IN2
4
12 11 9
IN3
TOL
WDO
REF
VCC
GND
MAX16005
IN6 SRT
3
10
IN1
THIN QFN
(4mm x 4mm)
TOP VIEW
19
20
18
17
7
6
8
IN5
WDI
GND
9
IN4
OUT2
MARGIN
SRT
OUT1
12
IN2
45
15 14 12 11
IN3
TOL
OUT6
OUT5
OUT4
VCC
MAX16004
IN6 OUT3
3
13
IN1
16 10 MR
RESET
THIN QFN
(4mm x 4mm)
TOP VIEW
MARGIN
SRT
+
19
20
18
17
7
6
8
IN6
IN8
WDI
9
IN5
N.C.
MARGIN
SRT
RESET
12
IN3
45
15 14 12 11
IN4
TOL
N.C.
N.C.
VCC
GND
MAX16007
IN7 N.C.
3
13
IN2
16 10 MR
IN1
THIN QFN
(4mm x 4mm)
TOP VIEW
23
24
22
21
8
7
9
IN6
IN8
WDI
GND
10
IN5
12
IN3
456
1718 16 14 13
IN4
TOL
OUT7
OUT6
OUT5
VCC
MAX16006
IN7
3
15
IN2
20 11 OUT8
IN1
19 12 MR
RESET
THIN QFN
(4mm x 4mm)
TOP VIEW
OUT2
OUT1
OUT3
OUT4
16
15
14
13
12
11
10
1
2
3
4
5
6
7
IN2
IN1
RESET
MARGININ5
IN4
TOL
IN3
TOP VIEW
MAX16005
SRT
MR
WDOGND
WDI
98 REFVCC
IN6
TSSOP
+
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
______________________________________________________________________________________ 25
Chip Information
PROCESS: BiCMOS
Ordering Information (continued)
PART TEMP RANGE PIN-PACKAGE
MAX16001_TE+ -40°C to +125°C 16 TQFN-EP*
MAX16002_TC+ -40°C to +125°C 12 TQFN-EP*
MAX16003_TE+ -40°C to +125°C 16 TQFN-EP*
MAX16004_TP+ -40°C to +125°C 20 TQFN-EP*
MAX16005_TE+ -40°C to +125°C 16 TQFN-EP*
MAX16005_UE+ -40°C to +125°C 16 TSSOP
MAX16006_TG+ -40°C to +125°C 24 TQFN-EP*
MAX16007_TP+ -40°C to +125°C 20 TQFN-EP*
Note: The “_” is a placeholder for the input voltage threshold.
See Table 1.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel, add a “T” after the “+.” Tape-and-reel are
offered in 2.5k increments.
*
EP = Exposed pad.
PART MONITORED
VOLTAGES
INDEPENDENT
OUTPUTS RESET WDI/WDO MR
ADJUSTABLE
RESET
TIMEOUT
MAX16000 4 4 ————
MAX16001 4 4 ✔WDI ✔✔
MAX16002 4 — ✔WDI ✔✔
MAX16003 6 6 ————
MAX16004 6 6 ✔WDI ✔✔
MAX16005 6 — ✔WDI/WDO ✔✔
MAX16006 8 8 ✔WDI ✔✔
MAX16007 8 — ✔WDI ✔✔
Selector Guide
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND
PATTERN NO.
12 TQFN-EP T1244+4 21-0139 90-0068
16 TSSOP U16+2 21-0066 90-0117
16 TQFN-EP T1644+4 21-0139 90-0070
20 TQFN-EP T2044+3 21-0139 90-0037
24 TQFN-EP T2444+4 21-0139 90-0022
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
26
____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 12/05 Initial release —
1 1/06 Released MAX16003 and MAX16004. 20, 21
2 7/06 Released MAX16005. Updated Pin Description and Detailed Description. 1, 4, 7, 9, 10, 20, 21
3 12/08 Added the MAX16005 TSSOP package. Modified the Detailed Description,
and added Figures 13, 14, and 15.
1, 2, 7, 8, 9, 10,
20–26
4 8/10 Revised the Absolute Maximum Ratings and the Power-Supply Bypassing
sections. 2, 22
5 10/10 Added new graph to the Typical Operating Characteristics.6