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MAX16154DECT Scheda tecnica(PDF) 1 Page - Maxim Integrated Products |
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MAX16154DECT Scheda tecnica(HTML) 1 Page - Maxim Integrated Products |
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1 / 20 page  General Description 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- sert the reset output whenever the VCC 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 volt- age thresholds are available from 1.50V to 5.0V in approx- imately 100mV increments. 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. 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 Benefits and Features ● 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 Ordering Information appears at end of data sheet. Click here for production status of specific part numbers. MAX16152/MAX16153/ MAX16154/MAX16155 nanoPower Supervisor and Watchdog Timer EVALUATION KIT AVAILABLE 19-100532; Rev 0; 4/2019 |
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