ICL7665:µP Voltage Monitor with Dual Over/Undervoltage Detection

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection

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.

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
ICL7665: Typical Operating Circuit
ICL7665: Typical Operating Circuit
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
DataSheet
titleDownload file
ICL7665 Data SheetICL7665.pdf
Parametrics
Part NumberInterfaceReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
ICL7665R/C Adjustable1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active High
Active Low
Open Drain
<1msNo WatchdogAdjustable Reset Input
Overvoltage/Window Monitor
215CDIP(N)/8
PDIP(N)/8
SOIC(N)/8
TO99/8
$2.73 @1k
Quality and Environmental Data
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Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
ICL7665AC/DNo Longer AvailableDICE SALES,;NA pin;DICE;0°C to +70°CSee data sheet
ICL7665ACJANo Longer AvailableCDIP(N),;8 pin;82.6 mm²0°C to +70°CNo
ICL7665ACJA/HRNo Longer AvailableCDIP(N),;8 pin;82.6 mm²-55°C to +125°CNo
ICL7665ACPANo Longer AvailableICL7665ACPA+PDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
ICL7665ACPA+ActivePDIP(N),;8 pin;79.7 mm²0°C to +70°CLead Free
ICL7665ACSANo Longer AvailableICL7665ACSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
ICL7665ACSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
ICL7665ACSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
ICL7665ACSA-TNo Longer AvailableICL7665ACSA+TSOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
ICL7665ACTVNo Longer AvailableTO99,;8 pin;88.4 mm²0°C to +70°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
ICL7665AEPANo Longer AvailableICL7665AEPA+PDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
ICL7665AEPA+ActivePDIP(N),;8 pin;79.7 mm²-40°C to +85°CLead Free
ICL7665AESANo Longer AvailableICL7665AESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
ICL7665AESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
ICL7665AESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
ICL7665AESA-TNo Longer AvailableICL7665AESA+TSOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
ICL7665BC/DNo Longer AvailableDICE SALES,;NA pin;DICE;0°C to +70°CSee data sheet
ICL7665BCJANo Longer AvailableCDIP(N),;8 pin;82.6 mm²0°C to +70°CNo
ICL7665BCPANo Longer AvailablePDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
ICL7665BCSANo Longer AvailableSOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
ICL7665BCSA-TNo Longer AvailableN.SO;8 pin0°C to +70°CSee data sheet
ICL7665BCTVNo Longer AvailableTO99,;8 pin;88.4 mm²0°C to +70°CNo
ICL7665C/DNo Longer AvailableDICE SALES,;NA pin;DICE S;0°C to +70°CSee data sheet
ICL7665CJANo Longer AvailableCDIP(N),;8 pin;82.6 mm²0°C to +70°CNo
ICL7665CPANo Longer AvailablePDIP(N),;8 pin;79.7 mm²0°C to +70°CNo
ICL7665CSANo Longer AvailableICL7665CSA+SOIC(N),;8 pin;30.9 mm²0°C to +70°CNo
ICL7665CSA+ActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
ICL7665CSA+TActiveSOIC(N),;8 pin;30.9 mm²0°C to +70°CLead Free
ICL7665CSA-TNo Longer AvailableICL7665CSA+TN.SO;8 pin0°C to +70°CSee data sheet
ICL7665CTVNo Longer AvailableTO99,;8 pin;88.4 mm²0°C to +70°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
ICL7665EPANo Longer AvailablePDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
ICL7665ESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
ICL7665ESA+TActiveN.SO;-40°C to +85°CSee data sheet
ICL7665IJANo Longer AvailableCDIP(N),;8 pin;82.6 mm²-20°C to +85°CNo
ICL7665IPANo Longer AvailableICL7665EPAPDIP(N),;8 pin;79.7 mm²-40°C to +85°CNo
ICL7665.pdf ICL7665
ICL7665.pdf ICL7665
ICL7665.pdf ICL7665
ICL7665.pdf ICL7665
ICL7665.pdf ICL7665