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ASM690ACSAF Datasheet(PDF) 1 Page - ON Semiconductor |
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ASM690ACSAF Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 12 page © Semiconductor Components Industries, LLC, 2011 August, 2011 − Rev. 3 1 Publication Order Number: ASM690A/D 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. 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 Battery Detection • Short Circuit Protection and Thermal Limiting • Small 8−pin SO and 8−pin PDIP Packages • No External Components • Specified Over Full Temperature Range Applications • Embedded Control Systems • Portable/Battery Operated Systems • Intelligent Instruments • Wireless Instruments • Wireless Communication Systems • PDAs and Hand−held Equipments • mP / mC Power Supply Monitoring • Safety System http://onsemi.com PIN CONFIGURATIONS See detailed ordering and shipping information in the package dimensions section on page 11 of this data sheet. ORDERING INFORMATION PDIP−8 P SUFFIX CASE 646AA SOIC−8 S SUFFIX CASE 751BD VOUT VCC GND PFI VBATT RESET WDI PFO ASM690A, ASM692A, ASM802L, ASM802M 1 VOUT VCC GND PFI VBATT RESET WDI PFO ASM805L 1 (Top Views) |
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