MAX16154 Datasheet

• 400nA (typ) Supply Current
• 1.2V to 5.5V Operating Supply Range
• Monitors Supply Voltage and Provides System Reset Signal
• 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
• 6-Pin SOT23 Package
• -40°C to +125°C Operating Temperature Range

• Glucose Monitors/Patient Monitor
• Metering
• Portable/Battery-Powered Equipment
• Tablets/e-Readers/Mobile Devices

The MAX16154 ultra-low-current supervisory circuits monitor a single system supply voltage and the integrity of code execution by a microprocessor or microcontroller. These supervisors assert the reset output whenever the V_CC supply voltage is 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 voltage thresholds are available from 1.50V to 5.0V in approximately 100mV increments.

A watchdog timer circuit monitors microprocessor or microcontroller activity. During normal operation, the microprocessor or microcontroller should repeatedly toggle the watchdog input (WDI) before the supervisor’s watchdog timeout period elapses to confirm that the system is executing code properly. If the microprocessor or microcontroller does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (active-low 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 microcontroller, or it may be used to interrupt the system to warn of execution errors. The MAX16154 feature a logic input (WD_EN) that allows the system to enable and disable the watchdog function.

The MAX16154 are offered in a 0.86mm x 1.27mm, 6-bump WLP. The MAX16154 operate over the -40°C to +125°C temperature range.