ICL7665CSA Maxim Integrated Products, ICL7665CSA Datasheet

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ICL7665CSA

Manufacturer Part Number
ICL7665CSA
Description
Microprocessor voltage monitor with dual overvoltage and undervoltage detection
Manufacturer
Maxim Integrated Products
Datasheet

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Part Number:
ICL7665CSA+
Manufacturer:
MAXIM/美信
Quantity:
20 000
The ICL7665 warns microprocessors ( 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
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
19-0001; Rev 2; 8/97
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.
__________Typical Operating Circuit
_______________General Description
SET1
OVERVOLTAGE
DETECTION
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
threshold and guaranteed performance over
V
IN1
SIMPLE THRESHOLD DETECTOR
1
3
OUT1
SET1
________________________________________________________________ Maxim Integrated Products
ICL7665
8
GND
4
V+
V+
OUT2
SET2
Microprocessor Voltage Monitor with
7
6
V
IN2
Dual Over/Undervoltage Detection
UNDERVOLTAGE
DETECTION
NMI
Ordering Information continued on last page.
____________________________Features
_________________Pin Configurations
______________Ordering Information
ICL7665CPA
ICL7665ACPA
ICL7665BCPA
ICL7665CSA
ICL7665ACSA
ICL7665BCSA
ICL7665CJA
ICL7665ACJA
ICL7665BCJA
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
TOP VIEW
PART
HYST1
HYST1
OUT1
SET1
GND
OUT1
SET1
TEMP. RANGE
1
2
3
4
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
2
1
3
DIP/SO
ICL7665
ICL7665
TO-99
8
4
GND
V+ (CASE)
5
7
6
8
7
6
5
OUT2
HYST2
SET2
PIN-PACKAGE
V+
OUT2
SET2
HYST2
8 Plastic DIP
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 CERDIP
8 CERDIP
8 CERDIP
8 SO
1

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ICL7665CSA Summary of contents

Page 1

... 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 ICL7665BCPA ICL7665CSA ICL7665ACSA ICL7665BCSA ICL7665CJA ICL7665ACJA ICL7665BCJA Ordering Information continued on last page. _________________Pin Configurations TOP VIEW UNDERVOLTAGE DETECTION NMI TEMP ...

Page 2

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection ABSOLUTE MAXIMUM RATINGS Supply Voltage (Note 1) .........................................-0.3V to +18V Output Voltages OUT1 and OUT2 (with respect to GND) (Note 1) ..........................-0.3V to +18V Output Voltages HYST1 and HYST2 (with respect to V+) ...

Page 3

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection ELECTRICAL CHARACTERISTICS (continued) ( +25°C, unless otherwise noted.) A PARAMETER SYMBOL Output Leakage Current I , OLK I HLK V Saturation OUT1 Voltage V Saturation HYST1 Voltage V Saturation ...

Page 4

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection AC OPERATING CHARACTERISTICS ( +25°C, unless otherwise noted.) A PARAMETER SYMBOL t SO1d t Output Delay Time, SH1d Input Going High t SO2d t SH2d t SO1d t Output ...

Page 5

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A OUT1 SATURATION VOLTAGE AS A FUNCTION OF OUTPUT CURRENT ...

Page 6

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection 1 OUT1 2 HYST1 INPUT 3 SET1 4 GND 1.6V 1.0V Figure 1. Test Circuit _______________Detailed Description As shown in the block diagram of Figure 2, the Maxim ICL7665 combines a 1.3V reference ...

Page 7

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection V V+ IN1 OUT1 OUT2 R21 ICL7665 SET1 SET2 R11 OUT1 V IN1 V TRIP1 OUT2 V IN2 Figure 3. Simple Threshold Detector Basic Over/Undervoltage Detection Circuits Figures 3, 4, and 5 show ...

Page 8

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection V IN R31 V+ HYST1 HYST2 R21 ICL7665 SET1 SET2 OVERVOLTAGE OUT1 OUT2 GND R11 OUT1 OUT2 Figure 5. Threshold Detector ...

Page 9

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection Combination Low-Battery Warning and Low-Battery Disconnect Nickel cadmium (NiCd) batteries are excellent recharge- able power sources for portable equipment, but care must be taken to ensure that NiCd batteries are not damaged by ...

Page 10

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection +5V SUPPLY V+ HYST1 HYST2 324k 13M 5% ICL7665 SET1 SET2 OVERVOLTAGE DETECTOR 100k OUT1 OUT2 V 5.55V U V 5.45V L Figure 6. Fault Monitor for a Single Supply R31 HYST1 R21 ...

Page 11

Microprocessor Voltage Monitor with Dual Over/Undervoltage Detection LINE-POWERED +5V INPUT 100k 2.4M 220 Figure 11. Battery Switchover Circuit TEMPERATURE SENSOR R3 (GENERAL 470k PURPOSE NPN TRANSISTOR) R1, 1M HIGH- TEMPERATURE LIMIT ADJUSTMENT Figure 12. Simple High/Low Temperature Alarm ______________________________________________________________________________________ Q1 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1997 Maxim Integrated Products ...

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