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MAX16152/MAX16153/
MAX16154/MAX16155
nanoPower Supervisor and Watchdog Timer
General Description
Benefits and Features
The MAX16152/MAX16153/MAX16154/MAX16155 ultra-
low-current supervisory circuits monitor a single system
supply voltage and the integrity of code execution by a
microprocessor or microcontroller. These supervisors as-
● 400nA (typ) Supply Current
● 1.2V to 5.5V Operating Supply Range
● Monitors Supply Voltage and Provides System Reset
Signal
sert the reset output whenever the V
supply voltage is
● 1.5V to 5V Input Threshold Range in 100mV
Increments
● Watchdog Function Detects Faulty Code Execution
● Open-Drain Reset and Watchdog Outputs
● Watchdog Timer Enable Input
● 6-Bump WLP Package
CC
greater than the minimum operating voltage, but less than
the reset threshold. After the supply voltage rises above
the reset threshold, the reset output remains asserted for
the reset timeout period, and then de-asserts. Reset volt-
age thresholds are available from 1.50V to 5.0V in approx-
imately 100mV increments.
● 6-Pin SOT23 Package
● -40°C to +125°C Operating Temperature Range
A watchdog timer circuit monitors microprocessor or mi-
crocontroller activity. During normal operation, the micro-
processor or microcontroller should repeatedly toggle the
watchdog input (WDI) before the supervisor’s watchdog
timeout period elapses to confirm that the system is exe-
cuting code properly. If the microprocessor or microcon-
troller does not provide a valid watchdog input transition
before the timeout period expires, the supervisor asserts
a watchdog (WDO) output to signal that the system is
not executing code as expected. The watchdog output
pulse can be used to reset the microprocessor or micro-
controller, or it may be used to interrupt the system to
warn of execution errors. The MAX16152 and MAX16153
feature a manual reset input (MR) to allow an external
pushbutton or logic signal to initiate a reset pulse. The
MAX16154 and MAX16155 feature a logic input (WD_EN)
that allows the system to enable and disable the watchdog
function.
Ordering Information appears at end of data sheet.
The MAX16152 and MAX16154 are offered in a 0.86mm
x 1.27mm 6-bump WLP, while the MAX16153 and
MAX16155 are offered in 6-pin SOT23 package. All de-
vices operate over the -40ºC to +125ºC temperature
range.
Applications
● Portable/Battery-Powered Equipment
● Tablets/e-Readers/Mobile Devices
● Glucose Monitors/Patient Monitor
● Metering
19-100532; Rev 2; 8/19