Analog Devices Inc. ADM8697AN

Description
The ADM8696/ADM8697 supervisory circuits provide complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include:
Power-On Reset output during power-up, power-down, and brownout conditions
Reset pulse if the optional watchdog timer has not been toggled within a specified time
Separate watchdog timeout and low line status outputs
Adjustable reset and watchdog timeout periods
1.3 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than Voc
Battery backup switching for CMOS RAM, CMOS microprocessor, or other low power logic (ADM8696)
Write protection of CMOS RAM or EEPROM (ADM8697)

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 Vec
Watchdog timer - 100 ms, 1.6 s, or adjustable
Low switch on resistance: 0.7 normal, 7 Ω 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
Qualified for automotive applications

Applications
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Automotive Systems