ASM805L - ON Semiconductor

ASM805L uP Power Supply Supervisor

The ASM690A / ASM692A / ASM802L / ASM802M / ASM805L offers complete 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 .

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 monitoring These features are pin−compatible with the industry standard power−supply supervisors. Short−circuit and thermal protection have also been added. The ASM690A / ASM802L / ASM805L generate a reset pulse when the supply voltage drops below 4.65 V and the AS.