General Description

The ICL7665 warns microprocessors (µPs) of overvoltage and undervoltage conditions. It draws a typical operating current of only 3µA. The trip points and hysteresis of the two voltage detectors are individually programmed via external resistors to any voltage greater than 1.3V. The ICL7665 will operate from any supply voltage in the 1.6V to 16V range, while monitoring voltages from 1.3V to several hundred volts. The Maxim ICL7665A is an improved version with a 2%-accurate VSET1 threshold and guaranteed performance over temperature.

Features

♦ µP Over/Undervoltage Warning

♦ Improved Second Source

♦ Dual Comparator with Precision Internal Reference

♦ 3µA Operating Current

♦ 2% Threshold Accuracy (ICL7665A)

♦ 1.6V to 16V Supply Voltage Range

♦ On-Board Hysteresis Outputs

♦ Externally Programmable Trip Points

♦ Monolithic, Low-Power CMOS Design

Applications

  µP Voltage Monitoring

  Low-Battery Detection

  Power-Fail and Brownout Detection

  Battery Backup Switching

  Power-Supply Fault Monitoring

  Over/Undervoltage Protection

  High/Low Temperature, Pressure, Voltage Alarms