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µP Voltage Monitor with Dual Over/Undervoltage Detection

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection

Product Details

Key Features

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2
Reset Out Active High
Active Low
Open Drain
Interface R/C Adjustable
tRESET (min) <1ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Overvoltage/Window Monitor
ICC (µA) (max) 15
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.04
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Simplified Block Diagram

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Parameters

Parametric specs for Supervisors (2 Monitored Voltages)
Reset Thresh. (V) 1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2
Reset Out Active High
Active Low
Open Drain
Interface R/C Adjustable
tRESET (min) <1ms
Watchdog Feature No Watchdog
Supervisor Features Adjustable Reset Input
Overvoltage/Window Monitor
ICC (µA) (max) 15
Package/Pins PDIP/8
SOIC (N)/8
Budgetary
Price (See Notes)
3.04

Key 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/Uses

  • µP Voltage Monitoring
  • Battery-Backup Switching
  • High/Low Temperature, Pressure, Voltage Alarms
  • Low-Battery Detection
  • Over/Undervoltage Protection
  • Power Supply Fault Monitoring
  • Power-Fail and Brownout Detection

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.

The 3µA quiescent current of the ICL7665 makes it ideal for voltage monitoring in battery-powered systems. In both battery- and line-powered systems, the unique combination of a reference, two comparators, and hysteresis outputs reduces the size and component count of many circuits.

Simplified Block Diagram

ICL7665: Typical Operating Circuit ICL7665: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .