19-0001; Rev 3; 11/15
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
V SET1 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.
________________________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
____________________________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
______________Ordering Information
PART
ICL7665CPA+
ICL7665ACPA+
TEMP. RANGE
PIN-PACKAGE
0°C to +70°C
8 Plastic DIP
0°C to +70°C
8 Plastic DIP
ICL7665BCPA+
0°C to +70°C
8 Plastic DIP
ICL7665CSA+
0°C to +70°C
8 SO
ICL7665ACSA+
0°C to +70°C
8 SO
ICL7665BCSA+
0°C to +70°C
8 SO
ICL7665CJA+
0°C to +70°C
8 CERDIP
ICL7665ACJA +
0°C to +70°C
8 CERDIP
+
ICL7665BCJA
0°C to +70°C
8 CERDIP
+Denotes a lead(pb)-free/RoHS-compliant package.
Ordering Information continued on last page.
_________________Pin Configurations
TOP VIEW
__________Typical Operating Circuit
VIN1
OVERVOLTAGE
DETECTION
V+
1 OUT1
8
V+
7
1
8
V+
HYST1
2
7
OUT2
6
SET2
5
HYST2
SET1 3
VIN2
OUT2
+
OUT1
ICL7665
GND 4
UNDERVOLTAGE
DETECTION
NMI
DIP/SO
ICL7665
3
SET2
SET1
6
GND
4
SIMPLE THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products
1
ICL7665
_______________General Description
