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GENERAL DESCRIPTION

The ADM8690/ADM8691/ADM8695 supervisory circuits offer complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include microprocessor reset, backup battery switchover, watchdog timer, CMOS RAM write protection, and power failure warning. The complete family provides a variety of configurations to satisfy most microprocessor system requirements.

FEATURES

Upgrade for the ADM690, ADM691, ADM695 and

for the MAX690, MAX691, MAX695

Specified over temperature

Low power consumption: 0.7 mW

Precision voltage monitor

Reset assertion down to 1 V VCC

Low switch on resistance: 0.7 Ω normal, 7 Ω in backup

High current drive: 100 mA

Watchdog timer: 100 ms, 1.6 sec, or adjustable

Standby current: 400 nA

Automatic battery backup power switching

Extremely fast gating of chip enable signals (3 ns)

Voltage monitor for power fail

Available in TSSOP package

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Automotive systems