Rainbow Electronics ICL7665 - Manual

_______________General Description
The ICL7665 warns microprocessors (
µ
Ps) of overvolt-
age and undervoltage conditions. It draws a typical
operating current of only 3µA. The trip points and hys-
teresis of the two voltage detectors are individually pro-
grammed 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 volt-
ages 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 sys-
tems. In both battery- and line-powered systems, the
unique combination of a reference, two comparators,
and hysteresis outputs reduces the size and compo-
nent 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
Ordering Information continued on last page.
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
8
7
6
5
OUT2
SET2
HYST2 GND
SET1
HYST1
OUT1
ICL7665
DIP/SO
TOP VIEW
2
8
4
6
1 7
3 5
ICL7665
V+ (CASE)
HYST2
SET2
OUT2 OUT1
HYST1
SET1
TO-99
GND
V+
_________________Pin Configurations
ICL7665
OUT1 OUT2
SET2 SET1
V+ V IN2
V IN1
V+
8
4
1 7
6 3
GND
OVERVOLTAGE
DETECTION
UNDERVOLTAGE
DETECTION
SIMPLE THRESHOLD DETECTOR
NMI
__________Typical Operating Circuit
19-0001; Rev 2; 8/97
PART TEMP. RANGE PIN-PACKAGE
ICL7665CPA 0°C to +70°C 8 Plastic DIP
ICL7665ACPA 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
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.