Datasheet MAX16152, MAX16153, MAX16154, MAX16155 (Maxim)

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MAX16152/MAX16153/ nanoPower Supervisor and Watchdog Timer MAX16154/MAX16155 General Description Benefits and Features
The MAX16152/MAX16153/MAX16154/MAX16155 ultra- ● 400nA (typ) Supply Current low-current supervisory circuits monitor a single system ● 1.2V to 5.5V Operating Supply Range supply voltage and the integrity of code execution by a ● Monitors Supply Voltage and Provides System Reset microprocessor or microcontroller. These supervisors as- Signal sert the reset output whenever the VCC supply voltage is ● 1.5V to 5V Input Threshold Range in 100mV greater than the minimum operating voltage, but less than Increments the reset threshold. After the supply voltage rises above ● Watchdog Function Detects Faulty Code Execution the reset threshold, the reset output remains asserted for ● Open-Drain Reset and Watchdog Outputs the reset timeout period, and then de-asserts. Reset volt- ● Watchdog Timer Enable Input age thresholds are available from 1.50V to 5.0V in approx- ● 6-Bump WLP Package imately 100mV increments. ● 6-Pin SOT23 Package A watchdog timer circuit monitors microprocessor or mi- ● -40°C to +125°C Operating Temperature Range crocontroller activity. During normal operation, the micro-
Ordering Information appears at end of data sheet.
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. 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 Document Outline General Description Applications Benefits and Features Typical Application Circuit Absolute Maximum Ratings Package Information Electrical Characteristics Pin Configurations 6 WLP 6 SOT23 6 WLP 6 SOT23 Pin Description Functional Diagrams MAX16152/MAX16153 Block Diagram MAX16154/MAX16155 Block Diagram Detailed Description Input Threshold Watchdog Watchdog Startup Delay Watchdog Timeout Period Watchdog Enable Input (WD_EN) Watchdog Input Signal Reset Timeout Period Manual Reset Applications Information Power Supply Bypassing Watchdog Software Considerations Negative-Going VCC Transients Protection Selector Guide Ordering Information Revision History