General Description
The MAX16054 is a pushbutton on/off controller with a
single switch debouncer and built-in latch. It accepts a
noisy input from a mechanical switch and produces a
clean latched digital output after a factory-fixed qualifi-
cation delay.
The MAX16054 eliminates contact bounce during switch
opening and closing. The state of the output changes
only when triggered by the falling edge of the
debounced switch input; the output remains unchanged
on the rising edge of the input. Robust switch inputs
handle ±25V levels and are ±15kV ESD protected for
use in harsh industrial environments. The MAX16054
features a complementary output, OUT, which is the
inverted state of OUT. An asynchronous CLEAR input
allows an external signal to force the output flip-flop low.
Undervoltage-lockout circuitry ensures that OUT is in the
off state upon power-up. The MAX16054 requires no
external components, and its low supply current makes
it ideal for use in portable equipment.
The MAX16054 operates from a +2.7V to +5.5V single
supply. The MAX16054 is offered in a 6-pin thin SOT23
package and operates over the -40°C to +125°C auto-
motive temperature range.
Applications
PDAs
MP3/Video Players
Portable Electronics
Set-Top Boxes
Portable Instrumentation
White Goods
Features
oRobust Inputs Can Handle Power Supplies Up to
±25V
o±15kV ESD Protection
oLatched Output
oLow 7µA Supply Current
oOperates from 2.7V to 5.5V
o-40°C to +125°C Temperature Range
oThin SOT23 Package
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
________________________________________________________________
Maxim Integrated Products
1
GND
OUTCLEAR
1
+
6V
CC
5 OUT
IN
MAX16054
THIN SOT23
TOP VIEW
2
34
Pin Configuration
Ordering Information
MAX16054
OUT
3V
LDO
μP
EN
OUT
IN
CLEAR
GND
ON/OFF WITH LDO
VCC
Typical Operating Circuits
19-4128; Rev 0; 5/08
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.
+
Denotes a lead-free package.
T = Tape and reel package. Devices are offered in 2.5k unit
increments.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX16054AZT+T
-40°C to +125°C 6 Thin SOT23
+AADU
Typical Operating Circuits continued at end of data sheet.
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values are at VCC = +5V, TA= +25°C.) (Note 2)
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.
Note 1: As per JEDEC 51 standard, multilayer board (PCB).
Note 2: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 3: OUT is guaranteed to be low for 1.0V ≤VCC ≤VUVLO.
VCC to GND..............................................................-0.3V to +6V
IN to GND ................................................................-30V to +30V
CLEAR to GND .........................................................-0.3V to +6V
OUT, OUT to GND......................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration
OUT, OUT to GND ...................................................Continuous
Continuous Power Dissipation (TA= +70°C)
6-Pin Thin SOT23
(derate 9.1mW/°C at +70°C) (Note 1) ............................727mW
Operating Temperature Range .........................-40°C to +125°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Voltage Range VCC (Note 3) 2.7 5.5 V
Supply Current ICC VCC = 5V, IOUT = IOUT = 0,
IN not connected 720µA
TA = +25°C 20 50 80
Debounce Duration tDP TA = -40°C to +125°C 5 50 99 ms
VIL 0.65
VCC = 5V 2.5IN Threshold VIH VCC = 2.7V 2.0
V
IN Hysteresis 420 mV
IN Pullup Resistance 32 63 100 kΩ
VIN = +25V +1.5
IN Current IIN VIN = -25V -1.5 mA
IN Voltage Range VIN -25 +25 V
Undervoltage-Lockout Threshold VUVLO VCC falling 1.8 2.4 V
VOL ISINK = 1.6mA 0.4
OUT/OUT Output Voltage VOH ISOURCE = 0.4mA VCC - 1.0 V
VCLEAR_IL 0.7
VCC = 5V 2.4CLEAR Threshold VCLEAR_IH VCC = 2.7V 2.0
V
CLEAR Input Current ICLEAR -1 +1 µA
CLEAR High to OUT Low
Propagation Delay tCO RL = 10kΩ, CL = 100pF 200 ns
ESD CHARACTERISTICS
IEC 61000-4-2 Air
Discharge ±15
IEC 61000-4-2 Contact
Discharge ±8
ESD Protection IN
Human Body Model ±15
kV
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
_______________________________________________________________________________________
3
SUPPLY CURRENT
vs. TEMPERATURE
MAX16054 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (μA)
1109565 80-10 5 20 35 50-25
1
2
3
4
5
6
7
8
9
10
0
-40 125
VCC = 5V
VCC = 3V
DEBOUNCE OF CLOSING SWITCH
MAX16054 toc02
10ms/div
10V
IN
10V/div
-10V
OUT
5V/div
0V
OUT
5V/div
0V
VCC = 5V
OUTPUT LOGIC LEVEL
vs. SUPPLY VOLTAGE
MAX16054 toc03
SUPPLY VOLTAGE (V)
OUTPUT LOGIC LEVEL (V)
5.04.54.03.53.02.5
1
2
3
4
5
6
0
2.0 5.5
VOH, ISOURCE = 0.4mA
VOL, ISINK = 1.6mA
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
DEBOUNCE DELAY PERIOD
vs. TEMPERATURE
MAX16054 toc04
TEMPERATURE (°C)
DEBOUNCE DELAY PERIOD (ms)
1109565 80-10 5 20 35 50-25
42
44
46
48
50
52
54
56
58
60
40
-40 125
VCC = 5V
VCC = 3V
VCC UNDERVOLTAGE LOCKOUT
vs. TEMPERATURE
MAX16054 toc05
TEMPERATURE (°C)
VCC UNDERVOLTAGE LOCKOUT (V)
1109580655035205-10-25
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
-40 125
VCC RISING
Pin Description
PIN NAME FUNCTION
1IN
Switch Toggle Input. IN features a -25V to +25V maximum input range and includes an internal 63kΩ
pullup resistor to VCC. Connect a pushbutton from IN to GND.
2 GND Ground
3 CLEAR Clear Input. Pull CLEAR high to force OUT low. Connect CLEAR to GND if unused.
4OUT Active-Low CMOS Output
5 OUT Active-High CMOS Output
6 V
CC +2.7V to +5.5V Supply Input. In noisy environments, bypass VCC to GND with a 0.1µF or greater
ceramic capacitor.
Detailed Description
Theory of Operation
The MAX16054 creates a push-on, push-off function
using a momentary-contact normally open SPST
switch. The high-to-low transition that occurs when
closing the switch causes OUT to go high and OUT to
go low. The output state remains latched after the
switch is released/opened. Closing the switch again
causes OUT to go low and OUT to go high.
Debounce circuitry eliminates the extraneous level
changes that result from interfacing with mechanical
switches (switch bounce). Virtually all mechanical
switches bounce upon opening and closing. The
bounce when a switch opens or closes is eliminated by
requiring that the sequentially clocked input remains in
the same state for a number of sampling periods. The
output does not change state from high-to-low or low-
to-high until the input is stable for at least 50ms (typ).
The
Functional Diagram
shows the functional blocks
consisting of an on-chip oscillator, counter, exclusive-
NOR gate, a D flip-flop, and a T (toggle) flip-flop. When
the pushbutton input does not equal the internal
debounced button state (the Q output of the D flip-
flop), the XNOR gate issues a counter reset. When the
switch input state is stable for the full qualification peri-
od, the counter clocks the D flip-flop, changing the
internal pushbutton state. The Q output of the D flip-flop
is connected to a toggle flip-flop that toggles when the
internal pushbutton state goes through a high-to-low
transition. Figure 1 shows the typical opening and clos-
ing switch debounce operation.
A rising pulse at CLEAR resets the T flip-flop and pulls
OUT low and OUT high.
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
4 _______________________________________________________________________________________
Functional Diagram
XNOR UNDERVOLTAGE
LOCKOUT
T
Q
CLR
COUNTER
DQ
R
DQ
CLR
OSC
VCC
RPU
R
IN
OUT
OUT
CLEAR
ESD
PROTECTION
VCC
MAX16054
Undervoltage Lockout
The undervoltage-lockout circuitry ensures that the out-
puts are at the correct state on power-up. While VCC is
less than the 2.1V (typ) undervoltage threshold and
greater than 1.0V, OUT remains low and transitions at
IN are ignored.
Robust Switch Input
The switch input (IN) has overvoltage clamping diodes to
protect against damaging fault conditions. Switch input
voltages can safely swing ±25V to ground. Proprietary
ESD-protection structures protect against high ESD
encountered in harsh industrial environments, membrane
keypads, and portable applications. They are designed
to withstand ±15kV per the IEC 61000-4-2 Air-Gap
Discharge test and ±8kV per the IEC 61000-4-2 Contact-
Discharge test.
Since there is a 63kΩ(typ) pullup resistor connected to
IN, driving the input to -25V draws approximately 0.5mA
from the VCC supply. Driving the input to +25V causes
approximately 0.32mA of current to flow back into the
VCC supply. If the total system VCC supply current is
less than the current flowing back into the VCC supply,
VCC rises above normal levels. In some low-current sys-
tems, a zener diode on VCC may be required.
±15kV ESD Protection
ESD-protection structures are incorporated on all pins
to protect against electrostatic discharges encountered
during handling and assembly. The MAX16054 has
extra protection against static electricity to protect
against ESD of ±15kV at the switch input without dam-
age. The ESD structures withstand high ESD in all
states: normal operation, shutdown, and powered
down. A design advantage of the MAX16054 is that it
continues working without latchup after an ESD event,
which eliminates the need to power-cycle the device.
ESD protection can be tested in various ways; this
product is characterized for protection to the following
limits:
1) ±15kV using the Human Body Model.
2) ±8kV using the Contact-Discharge method specified
in IEC 61000-4-2.
3) ±15kV using the IEC 61000-4-2 Air-Gap method.
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
_______________________________________________________________________________________ 5
VCC
tDP tDP tDP tDP tDP
tCO
UVLO
IN
OUTPUT OF D
FLIP-FLOP
(INVERTED
IN AFTER
DEBOUNCE)
OUT
CLEAR
Figure 1. MAX16054 Timing Diagram
MAX16054
Human Body Model
Figure 2a shows the Human Body Model, and Figure
2b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩresistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment; it does not specifi-
cally refer to integrated circuits. The MAX16054 helps in
the design of equipment that meets IEC 61000-4-2, with-
out the need for additional ESD-protection components.
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2, because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body Model.
Figure 3a shows the IEC 61000-4-2 model, and Figure
3b shows the current waveform for the IEC 61000-4-2
ESD Contact-Discharge test.
The Air-Gap test involves approaching the device with a
charged probe. The Contact-Discharge method connects
the probe to the device before the probe is energized.
Machine Model
The Machine Model for ESD tests all pins using a
200pF storage capacitor and zero discharge resis-
tance. Its objective is to emulate the stress caused by
contact that occurs with handling and assembly during
manufacturing.
On/Off Controller with Debounce and
±15kV ESD Protection
6 _______________________________________________________________________________________
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1MΩ
RD
1500Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 2a. Human Body ESD Test Model
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
RC
50MΩ to 100MΩ
RD
330Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 2b. Human Body Current Waveform
IP 100%
90%
36.8%
tRL
TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 3a. IEC 61000-4-2 ESD Test Model
tR = 0.7ns TO 1ns
30ns
60ns
t
100%
90%
10%
IPEAK
I
Figure 3b. IEC 61000-4-2 ESD Generator Current Waveform
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
_______________________________________________________________________________________ 7
Typical Operating Circuits (continued)
MAX16054
OUT
3V μP
OUT
IN
CLEAR
GND
ON/OFF WITH p-CHANNEL MOSFET
VCC
MAX16054
OUT
OUT
IN
CLEAR
GND
PUSH EITHER BUTTON
VCC
3.3V
MAX16054
OUT
OUT
IN
CLEAR
GND
DIGITAL PUSHBUTTON WITH LED (DEFAULT = OFF)
VCC
3.3V
MAX16054
OUT
OUT
IN
CLEAR
GND
PUSH BOTH BUTTONS
VCC
3.3V
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
8 _______________________________________________________________________________________
Typical Operating Circuits (continued)
MAX16054
OUT
OUT
IN
CLEAR
GND
DIGITAL PUSHBUTTON WITH LED (DEFAULT = ON)
VCC
3.3V
MAX16054
OUT
R
R, C SETS
PULSE WIDTH
C
OUT
IN
CLEAR
GND
PUSHBUTTON ONE-SHOT
VCC
3.3V
MAX16054
OUT
OUT
IN
AB
STATE
0
CLEAR
GND
VCC
3.3V
MAX16054
OUT
AB
OUT
IN
CLEAR
GND
4-POSITION PUSHBUTTON SELECTOR SWITCH
LED STATE
VCC
3.3V
STATE
1
STATE
2
STATE
3
MAX16054
On/Off Controller with Debounce and
±15kV ESD Protection
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________
9
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Package Information
For the latest package outline information, go to
www.maxim-ic.com/packages.
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
6 Thin SOT23 Z6-1 21-0114
Chip Information
PROCESS: BiCMOS
