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ADM8697 Datasheet Microprocessor Supervisory Circuits

Manufacturer: Analog Devices

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General Description

VBATT Microprocessor Supervisory Circuits ADM8696/ADM8697 FUNCTIONAL BLOCK DIAGRAMS BATT ON VOUT VCC LLIN LOW LINE RESET RESET GENERATOR RESET OSC IN OSC SEL TIMEBASE FOR RESET AND WATCHDOG WATCHDOG TIMER WATCHDOG INPUT (WDI) POWER FAIL INPUT (PFI) 1.3V WATCHDOG TRANSITION DETECTOR WATCHDOG OUTPUT (WDO) ADM8696 POWER FAIL OUTPUT (PFO) The ADM8696/ADM8697 supervisory circuits offer 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 ADM8696/ADM8697 are available in 16-pin DIP and small outline packages (including TSSOP) and provide the following functions: 1.

Overview

a.

Key Features

  • Upgrade for ADM696/ADM697, MAX696/MAX697 Specified Over Temperature Adjustable Low Line Voltage Monitor Power OK/Reset Time Delay Reset Assertion Down to 1 V VCC Watchdog Timer.
  • 100 ms, 1.6 s, or Adjustable Low Switch On Resistance 0.7 ⍀ Normal, 7 ⍀ in Backup 400 nA Standby Current Automatic Battery Backup Switching (ADM8696) Fast On-Board Gating of Chip Enable Signals (ADM8697) Voltage Monitor for Power Fail or Low Battery Warning Also Available in TSSOP Package.

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