ADM800M

a FEATURES Low Power Consumption: Precision Voltage Monitor ؎2% Tolerance on ADM800L/M Reset Time Delay—200 ms, or Adjustable 1 ␮ A Standby Current Automatic Battery Backup Power Switching Fast Onboard Gating of Chip Enable Signals Also Available in TSSOP Package (ADM691A) APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Automotive Systems Critical ␮P Power Monitoring Microprocessor Supervisory Circuits ADM691A/ADM693A/ADM800L/M FUNCTIONAL BLOCK DIAGRAM BATT ON 4.65V1 VCC VOUT VBATT CHIP ENABLE OUTPUT CONTROL CEIN CEOUT LOW LINE OSC IN OSC SEL RESET & WATCHDOG TIMEBASE RESET & GENERATOR RESET RESET WATCHDOG INPUT (WDI) WATCHDOG TRANSITION DETECTOR WATCHDOG TIMER WATCHDOG OUTPUT (WDO) POWER FAIL OUTPUT (PFO) GENERAL DESCRIPTION POWER FAIL INPUT (PFI) 1.25V The ADM691A/ADM693A/ADM800L/ADM800M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include µP reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The family of products provides an upgrade for the MAX691A/93A/800M family of products. All parts are available in 16-pin DIP and SO packages. The ADM691A is also available in a space-saving TSSOP package. The following functionality is provided: 1. Power-on reset output during power-up, power-down and brownout conditions. The circuitry remains operational with VCC ...