ASM802L
Description
The ASM690A / ASM692A / ASM802L / ASM802M / ASM805L offers plete single chip solutions for power supply monitoring and control battery functions in microprocessor systems. Each device implements four functions: Reset control, watchdog monitoring, battery- backup switching and power failure monitoring. In addition to microprocessor reset under power- up and power- down conditions, these devices provide battery- backup switching to maintain control in power loss and brown- out situations. Additional monitoring capabilities can provide an early warning of unregulated power supply loss before the voltage regulator drops out. The important features of these four functions are:
- 1.6 second watchdog timer to keep microprocessor responsive
- 4.40 V or 4.65 V VCC threshold for microprocessor reset at power- up and power- down
- SPDT (Single- pole, Double- throw) PMOS switch connects backup power to RAM if VCC fails
- 1.25 V threshold detector for power loss or general purpose voltage...
