Watchdog Timeout Period Externally Adjustable Voltage Detector
The XC6131 series are voltage detectors with a watchdog function. The watchdog timeout time and release delay time can be set as desired using a single external capacitor. These voltage detectors are used for microprocessor monitoring, and when the power voltage reaches the detect voltage or an L→H pulse is not input to the watchdog pin within the watchdog timeout time, an L level signal is output from the RESETB pin.
The XC6131 series has a watchdog ON/OFF function. By setting the EN pin to L level, the watchdog function can be turned OFF while the voltage detector that monitors the power voltage continues to operate.
The MRB pin and EN pin are pulled up internally to VIN, and thus these pins can be left open when not used.
|Apr 15, 2014||
Typical Application Circuit
|Operating Ambient Temperature||-40℃～+125℃|
|Operating Voltage Range||1.5V～6.0V|
|Detect Voltage Range||1.6V～5.0V±1.0%|
|Detect Voltage Temperature Characteristics||±50ppm/℃|
|Output Configuration||N-channel open drain|
|Low Quiescent Current||8.1μADetect
|Functions||Watchdog ON/OFF Function|
|Watchdog Timeout Period||100ms(Cd=0.1μF)|
|Release Delay Time||100ms(Cd=0.1μF) (Power-on State)
10ms (Cd=0.1μF) (After Watchdog Timeout)
|Environmentally Friendly||EU RoHS compliant, Pb free|
|Package||DFN1515-6A||Number of Pins||6|
|Pcs/Reel||5,000||Package Size(mm)||1.5 x 1.5 x 0.37|
|Package||SOT-26||Number of Pins||6|
|Pcs/Reel||3,000||Package Size(mm)||2.8 x 2.9 x 1.3|
What does the watchdog timer work?
This timer function is continuously monitoring to check whether the microcomputer is normally operating or not and give notice of any abnormal operation.