The MAX16136, a low voltage, ±1% accurate window-detector supervisor circuit monitors a single system supply voltage and the integrity of code execution by a microprocessor or microcontroller. This device features an active-low, open-drain output that asserts whenever the monitored supply rail falls outside of the factory-trimmed undervoltage/overvoltage window threshold. The reset output remain asserted for the programmed reset timeout period after the monitored supply voltage falls within the undervoltage/overvoltage window threshold.
The MAX16136 offers factory-trimmed voltage thresholds from 0.5V to 5V in approximately 20mV increment. A variety of factory trimmed undervoltage/overvoltage thresholds from ±4% to ±11% are available to accommodate different supply voltages and tolerances.
A window-watchdog timer circuit monitors microprocessor or microcontroller activity. During normal operation, the microprocessor or microcontroller must repeatedly toggle the watchdog input (WDI) low within the fast watchdog timeout (tWD_F) and slow watchdog timeout (tWD_S). If the microcontroller or microprocessor does not toggle WDI within the window-timeout period, the supervisor asserts the watchdog output (
In addition, the MAX16136 features an overvoltage fault output (
The MAX16136 is available in a small, 2mm x 2mm, 8-pin TDFN side-wettable package and operates over the automotive temperature range of -40°C to +125°C.
- ±1% Accuracy
- Enables ASIL Compliance at System Level
- FMEDA Results Available Upon Request
- 0.5V to 5V Threshold Range with 20mV Increments
- ±4% to ±11% Undervoltage/Overvoltage Thresholds
- Latched Overvoltage Fault Output
- Clear Fault Input
- 5μs Overvoltage Fault Delay
- Window Watchdog Timeout
- Factory-Set Reset Timeout
- Open-Drain Reset Output
- TDFN-8 Side-Wettable Package
- -40°C to +125°C Operating Temperature Range
- Advanced Driver-Assistance Systems (ADAS)
- Multivoltage ASICs
- Storage Equipment
19-100580; Rev 0; 6/19