MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
DESCRIPTION
The MC34064 is an undervoltage
sensing circuit designed specifically
for use as a reset controller in
microprocessor- based systems. It
offers the designer an economical,
space-efficient solution for low supply
voltage detection when used in
combination with a single pullup
resistor. Adding one capacitor offers
the functionality of a programmable
delay time after power returns. The
34064 consists of a temperature stable
reference comparator with hysteresis,
high-cur rent clampi ng di o de and open
collector output stage capable of
sinking up to 60mA. The MC34064's
RESET output is specified to be fully
functional at VIN=1V. A major
improvement over competing products
is the glitch-free supply current during
undervoltage detection. Competing
products demand a step function
increase in operating current during the
time that you least want or need it:
during power loss. See Product
Highlight below.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
KEY FEATURES
Monitors 5V Supplies (VT =
4.6V Typ.)
Outputs Fully Defined At VIN =
1V (See Figure 1)
Glitch-Free Supply Current
During Switching (See Product
Highlight)
Ultra-Low Supply Current
(500µA Max.)
Temperature Compensated
ICC For Extremely Stable
Current Consumption
µP Reset Function
Programmable With 1 External
Resistor And Capacitor
Comparator Hysteresis
Prevents Output Oscillation
Electrically Compatible With
Motorola MC34064
Pin-to-Pin Compatible With
Motorola MC34064 / MC34164
APPLICATIONS
All Microprocessor Or
Microcontroller Designs Using
5V Supplies
Simple 5V Undervoltage
Detection
PACKAGE ORDER INFO
DM Plastic SOIC
8-Pin LP Plastic TO-92
3-Pin PK Plastic SOT-89
3-Pin
TA (°C) RoHS / Pb-free
Transition DC: 0440
RoHS / Pb-free
Transition DC: 0509
RoHS / Pb-free
Transition DC: 0518
0 to 70 MC34064DM MC34064LP MC34064PK
-40 to 85 MC33064DM MC33064LP MC33064PK
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX34064DM-TR)
M
MC
C3
3X
X0
06
64
4
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (VIN)................................................................................ -1V to 10V
RESET Output Voltage (VOUT)......................................................................................10V
Output Sink Current (IOL) ..............................................................Internally Limited (mA)
Clamp Diode Forward Current (IF), Pin 1 to Pin 2 ....................................................100mA
Operating Temperature Range................................................................................... 150°C
Operating Ambient Temperature Range (TA)
MC34064 .........................................................................................................0°C to 70°C
MC33064.......................................................................................................-40°C to 85°C
Storage Temperature Range.........................................................................-65°C to 150°C
Package Peak Temp. for Solder Reflow (40 seconds maximum exposure) ...260°C (+0 -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
THERMAL DATA
DM Plastic SOIC 8-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 165°C/W
LP Plastic TO-92 3-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 156°C/W
PK Plastic SOT-89 3-Pi n
THERMAL RESISTANCE-JUNCTION TO TAB, θJT 35°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 71°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
PACKAGE PIN OUT
RESET
VIN
N.C.
GROUND N.C.
1
2
3
45
6
7
8
N.C.
N.C.
N.C.
DM PACKAGE
(Top View)
3
RESET
2
1
VIN
GROUND
LP PACKAGE
(Top View)
RESET
GROUND
VIN
1
2
3
PK PACKAGE
(Top View)
RoHS / Pb-free 100% matte Tin Lead Finish
RECOMMENDED OPERATING CONDITIONS
Conditions: Range over which the device is functional.
MC3x064
Parameter Symbol
Min Typ Max
Units
`
Input Supply Voltage VIN 1 6.5 V
RESET Output Voltage VOUT 6.5 V
Clamp Diode Forward Current IF 50 mA
P
PA
AC
CK
KA
AG
GE
E
D
DA
AT
TA
A
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
IC ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C≤ TA ≤ 70°C for the
MC34064 and -40°C < TA < 85°C for the MC33064. Low duty cycle pulse testing techniques are used which maintains junction and case
temperatures equal to the ambient temperature.
MC3x064
Parameter Symbol Test Conditions Min Typ Max
Units
` COMPARATOR SECTION
Threshold Voltage
High State Output VT+ VIN Increasing – 4V to 5V 4.5 4.61 4.7 V
Low State Outputs VT- VIN Decreasing – 5V to 4V 4.5 4.59 4.7 V
Hysteresis VH 0.01 0.02 0.05 V
` RESET OUTPUT SECTION
Output Low Level Saturation
Voltage VOL VIN = 4.0V, IOL = 8.0mA 1.0 V
VIN = 4.0V, IOL = 2.0mA 0.4 V
VIN = 1.0V, IOL = 0.1mA 0.1 V
Output Low Level Current IOL VIN = VOUT = 4.0V 10 27 60 mA
Output Off-State Leakage IOH VIN = VOUT = 5.0V 0.02 0.5 µA
Clamp Diode Forward Voltage VF Pin 1 to Pin 2, IF = 10mA 0.6 0.9 1.2 V
` TOTAL DEVICE
Supply Current ICC VIN = 5.0V 390 500 µA
CHART AND APPLICTION INDEX
Characteristic Curves Application Circuits
Figure #
1. Input Voltage and RESET Output Voltage vs. Time
2. Power-Up RESET Voltage
3. Power-Down RESET Voltage
4. RESET Output Voltage vs. Input Voltage
5. Threshold Voltage vs. Temperature
6. Threshold Hysteresis vs. Temperature
7. Supply Current vs. Input Voltage
8. Supply Current vs. Temperature
9. Low Level Output Current vs. Temperature
10. Low Level Output Saturation Voltage vs.
Temperature
11. Low Level Output Saturation Voltage vs.
Temperature
12. Clamp Diode Forward Voltage vs. Forward Current
13. Propagation Delay – HIGH to LOW
14. Propagation Delay – LOW to HIGH
Figure #
15. Low Voltage Microprocessor Reset
16. Switching the Load off when Battery Reaches
Below 4.3V
17. Voltage Monitor
18. MOSFET Low Voltage Gate Drive Protection
19. Low Voltage Microprocessor Reset with Additional
Hysteresis
20. Solar Powered Battery
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
SIMPLIFIED BLOCK DIAGRAM
VIN
+
_
1.2 VREF
GROUND
RESET
Simplified Block Diagram
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
LS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page
5
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
CHARACTERISTIC CURVES
Figure 1 – Input Voltage and RESET Output Voltage vs. Time
Figure 2 – Power-Up RESET Voltage
Figure 3 – Power-Down RESET Voltage
Figure 4 – RESET Output Voltage vs. Input Voltage
Figure 5 – Threshold Voltage vs. Temperature
Figure 6 – Threshold Hysteresis vs. Temperature
G
GR
RA
AP
PH
HS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
CHARACTERISTIC CURVES
Figure 7 – Supply Current vs. Input Voltage
Figure 8 – Supply Current vs. Temperature
Figure 9 – Low Level Output Current vs. Temperature
Figure 10 – Low Level Output Saturation Voltage vs.
Temperature
Figure 11 – Low Level Output Saturation Voltage vs.
Temperature
Figure 12 – Clamp Diode Forward Voltage vs. Forward Current
G
GR
RA
AP
PH
HS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
CHARACTERISTIC CURVES
Figure 13 – Propagation Delay – HIGH to LOW Figure 14 – Propagation Delay – LOW to HIGH
G
GR
RA
AP
PH
HS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
TYPICAL APPLICATION CIRUITS
Figure 15 – Low Voltage Microprocessor Reset
A time delayed reset can be accomplished with the addition
of CDLY. For systems with extremely fast power supply rise
times (<500ns) it is recommended that the RCDLY time
constant be greater than 5.0µs. VTH(MPU) is the
microprocessor reset input threshold.
Figure 16 – Switching the Load off When battery Reaches
Below 4.3V
Figure 17 – Voltage Monitor
Figure 18 – MOSFET Low Voltage gate Drive Protection
Overheating of the logic level power MOSFET due to
insufficient gate voltage can be prevented with the above
circuit. When the input signal is below the 4.6 volt threshold
of the MC34064, its output grounds the gate of the L2
MOSFET.
G
GR
RA
AP
PH
HS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
TYPICAL APPLICATION CIRUITS
Figure 19 – Low Voltage Microprocessor Reset with
Additional Hysteresis.
10k1.5R
150R:Where
10340RV
0.02
R
4.6R
V
L
H
6
HTH(LOWER)
L
H
H
==
=
•=
+=
−
Test Data
VH
(mV)
∆VTH
(mV)
RH
(Ω)
RL
(Ω)
20 0 0 0
51 3.4 10 1.5
40 6.8 20 4.7
81 6.8 20 1.5
71 10 30 2.7
112 10 30 1.5
100 16 47 2.7
164 16 47 1.5
190 34 100 2.7
327 34 100 1.5
276 51 150 2.7
480 51 150 1.5
Comparator hysteresis can be increased with the addition of resistor RH. The hysteresis equation has been simplified and does
not account for the change of input current IIN as VCC crosses the comparator threshold. An increase of the lower threshold.
VTH(LOWER) will be observed due to IIN which is typically 340A at 4.59V. The equations are accurate to ±10% with RH less
than 150 and RL between 1.5k and 10k.
Figure 20 – Solar Powered Battery Charger
G
GR
RA
AP
PH
HS
S
MC33064 / MC34064
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
Copyright © 1999
Rev. 1.4, 2006-12-14
2.1
WWW.Microsemi .COM
Undervoltage Sensing Circuit
TM ®
NOTES
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be modified in
any way without the express written consent of Microsemi. Product processing does not
necessarily include testing of all parameters. Microsemi reserves the right to change the
configuration and performance of the product and to discontinue product at any time.
N
NO
OT
TE
ES
S
