YB1921 - 3-Pin Microprocessor Reset Monitor
Pin No.
2 Symbol GND Ground Description RESET 1 VCC 3 S809La 1 GND 2 RESET RESET output remains low while Vcc is below the reset voltage threshold and for 240msec(typ) after Vcc rises above reset threshold Supply Voltage (typ.) 3 Vcc Ordering/Marking Information Reset Vcc threshold (V
YB1921 3-Pin Microprocessor Reset Monitor Introduction The YB1921 is a cost-effective system supervisor Integrated Circuit (IC) designed to monitor VCC in digital and mixed signal systems and provide a warning signal when the system power supply is out of working range, and a reset signal to the host processor when necessary.
No external components are required.
The reset output is driven active within 20μsec of VCC falling through the reset voltage threshold.
Reset is maintained active for a mi
YB1921 Features
* z z z z z z z z Precision VCC Monitor for 2.8V, 3.0V, 3.3V, and 5.0V Supplies 140msec Guaranteed Minimum RESET Output Duration RESET Output Guaranteed to VCC=1.0V Low 18μA Supply Current VCC Transient Immunity Small SOT-23 Package No External Components Wide Operating Temperature: 0°C to 85°C Appl
