ADM691ARZ

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: - Power - on reset output during power - up, power - down and brownout conditions. The circuitry remains operational with VCC as low as 1V - Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic. - A reset pulse if the optical watchdog timer has not been toggled within a specified time. - A 1.25V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5V

Applications

• Microprocessor Systems
• Computers
• Controllers
• Intelligent Instruments
• Automotive Systems
• Critical μP Power Monitoring

Key features

• Low Power Consumption: Precision Voltage Monitor ±2% Tolerance on ADM800L/M
• Reset Time Delay - 200 ms, or Adjustable
• 1μA Standby Current
• Automatic Battery Backup Power Switching
• Fast Onboard Gating of Chip Enable Signals
• Also Available in TSSOP Package (ADM691A)