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ASM802L

ON Semiconductor
Part Number ASM802L
Manufacturer ON Semiconductor
Description uP Power Supply Supervisor
Published Feb 2, 2016
Detailed Description ASM690A/692A, ASM802L/802M, ASM805L mP Power Supply Supervisor with Battery Backup Switch Description The ASM690A / AS...
Datasheet PDF File ASM802L PDF File

ASM802L
ASM802L

Overview
ASM690A/692A, ASM802L/802M, ASM805L mP Power Supply Supervisor with Battery Backup Switch Description 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 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 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 ASM692A / ASM802M generate a reset below 4.
40 V.
The ASM802L / ASM802M have power−fail accuracy to ±2%.
The ASM805L is the same as the ASM690A except that RESET is provided instead of RESET.
http://onsemi.
com PDIP−8 P SUFFIX CASE 646AA SOIC−8 S SUFFIX CASE 751BD PIN CONFIGURATIONS VOUT VCC GND PFI 1 ASM690A, ASM692A, ASM802L, ASM802M VBATT RESET WDI PFO VOUT VCC GND PFI 1 ASM805L (Top Views) VBATT RESET WDI PFO Features • Two Precision Supply−voltage Monitor Options 4.
65 V (ASM690A / ASM802L / ASM805L) 4.
40 V (ASM692A / ASM802M) • Battery−backup Power Switch On−chip • Watchdog Timer: 1.
6 Second Timeout • Power Failure / Low Batte...


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