19-0001; Rev 2; 8/97
Mic ro p ro c e s s o r Vo lt a g e Mo n it o r w it h
Du a l Ove r/Un d e rvo lt a g e De t e c t io n
ICL765
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ µP Over/Undervoltage Warning
The ICL7665 warns microprocessors (µPs) 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
♦ 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
V
SET
threshold and guaranteed performance over
1
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.
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 Plastic DIP
8 SO
ICL7665CPA
ICL7665ACPA
ICL7665BCPA
ICL7665CSA
ICL7665ACSA
ICL7665BCSA
ICL7665CJA
ICL7665ACJA
ICL7665BCJA
________________________Ap p lic a t io n s
µP Voltage Monitoring
8 SO
Low-Battery Detection
8 SO
Power-Fail and Brownout Detection
Battery Backup Switching
8 CERDIP
8 CERDIP
8 CERDIP
Power-Supply Fault Monitoring
Over/Undervoltage Protection
High/Low Temperature, Pressure, Voltage Alarms
Ordering Information continued on last page.
_________________P in Co n fig u ra t io n s
TOP VIEW
OUT1
HYST1
SET1
1
2
3
4
8
7
6
5
V+
__________Typ ic a l Op e ra t in g Circ u it
OUT2
SET2
ICL7665
V
IN1
V+
V
IN2
GND
HYST2
8
OVERVOLTAGE
DETECTION
UNDERVOLTAGE
DETECTION
V+
1
3
7
6
DIP/SO
OUT1
SET1
OUT2
NMI
V+ (CASE)
OUT2
8
ICL7665
OUT1
1
7
SET2
2
HYST1
6
SET2
GND
4
ICL7665
4
3
5
SET1
HYST2
GND
TO-99
SIMPLE THRESHOLD DETECTOR
________________________________________________________________ Maxim Integrated Products
1
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.