Datasheet Linear Technology LTC691ISW#TRPBF — 数据表

LTC690/LTC691
LTC694/LTC695
Microprocessor
Supervisory Circuits
Features Description Guaranteed Reset Assertion at VCC = 1V
n 1.5mA Maximum Supply Current
n Fast (35ns Max) Onboard Gating of RAM Chip Enable Signals
n SO-8 and S16 Packaging
n 4.65V Precision Voltage Monitor
n Power OK/Reset Time Delay: 50ms, 200ms or Adjustable
n Minimum External Component Count
n 1ВµA Maximum Standby Current
n Voltage Monitor for Power-Fail or Low Battery Warning
n Thermal Limiting
n Performance Specified Over Temperature
n Superior Upgrade for MAX690 Family The LTCВ®690 family, LTC690/LTC691/LTC694/LTC695,
provides complete power supply monitoring and battery
control functions for microprocessor reset, battery backup, CMOS RAM write protection, power failure warning
and watchdog timing. A precise internal voltage reference
and comparator circuit monitor the power supply line.
When an out-of-tolerance condition occurs, the reset
outputs are forced to active states and the chip enable
output unconditionally write-protects external memory. …