ICL7665.pdf

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19-0001; Rev 2; 8/97
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
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.
m
____________________________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
TEMP. RANGE
PIN-PACKAGE
ICL7665CPA
0°C to +70°C
8 Plastic DIP
________________________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
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
Ordering Information continued on last page.
_________________Pin Configurations
TOP VIEW
OUT1
1
2
3
4
8
7
6
5
V+
__________Typical Operating Circuit
HYST1
OUT2
SET2
HYST2
ICL7665
SET1
V IN1
V+
V IN2
GND
8
OVERVOLTAGE
DETECTION
UNDERVOLTAGE
DETECTION
1
V+
7
DIP/SO
OUT1
OUT2
NMI
8
V+ (CASE)
ICL7665
OUT1
1
7
OUT2
3
6
SET1
SET2
GND
HYST1
2
ICL7665
6
SET2
4
SET1
3
5
HYST2
4
GND
SIMPLE THRESHOLD DETECTOR
TO-99
________________________________________________________________ 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.
_______________General Description
The ICL7665 warns microprocessors (
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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+) (Note 1) .............................+0.3V to -18V
Input Voltages SET1 and SET2
(Note 1)........................................(GND - 0.3V) to (V+ + 0.3V)
Maximum Sink Output Current
OUT1 and OUT2.............................................................25mA
Maximum Source Output Current
HYST1 and HYST2 ........................................................-25mA
Continuous Power Dissipation (T A = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C) ........................471mW
CERDIP (derate 8.00mW/°C above +70°C) ................640mW
TO-99 (derate 6.67mW/°C above +70°C) ...................533mW
Operating Temperature Ranges
ICL7665C_ _.......................................................0°C to +70°C
ICL7665I_ _ .....................................................-20°C to +85°C
ICL7665E_ _ ....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: Due to the SCR structure inherent in the CMOS process used to fabricate these devices, connecting any terminal to volt-
ages greater than (V+ + 0.3V) or less than (GND - 0.3V) may cause destructive latchup. For this reason, we recommend
that inputs from external sources that are not operating from the same power supply not be applied to the device before its
supply is established, and that in multiple supply systems, the supply to the ICL7665 be turned on first. If this is not possi-
ble, currents into inputs and/or outputs must be limited to ±0.5mA and voltages must not exceed those defined above.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = 5V, T A = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ICL7665
T A = +25°C
1.6
16
T A = T MIN to T MIN
1.8
16
Operating Supply Voltage
V+
ICL7665A
T A = T MIN to T MIN
2.0
16
V
ICL7665B
T A = +25°C
1.6
10
T A = T MIN to T MIN
1.8
10
ICL7665,
T A = +25°C;
ICL7665A,
T A = T MIN to T MAX
V+ = 2V
2.5
10
GND £ V SET1,
V SET2 £ V+,
all outputs open
circuit
V+ = 9V
2.6
10
Supply Current
I+
V+ = 15V
2.9
15
m A
ICL7665B,
T A = +25°C
V+ = 2V
2.5
10
V+ = 9V
2.6
10
ICL7665, ICL7665B, T A = +25°C
V SET1
1.150
1.300
1.450
V SET2
1.200
1.300
1.400
Input Trip Voltage
V SET
ICL7665A, T A = +25°C
V SET1
1.275
1.300
1.325
V
V SET2
1.225
1.300
1.375
ICL7665A, T A = T MIN to T MAX
V SET1
1.250
1.300
1.350
V SET2
1.215
1.300
1.385
V SET Tempco
100
ppm/°C
Supply Voltage Sensitivity
of V SET1 , V SET2
R OUT1 , R OUT2 , R HYST1 , R HYST2 = 1M
½
0.004
%/V
2 _______________________________________________________________________________________
131540551.036.png
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, T A = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX UNITS
All grades, V SET = 0V or
V SET ³ 2V, T A = +25°C
OUT1, OUT2
10
200
HYST1, HSYT2
-10
-100
Output Leakage Current
I OLK ,
I HLK
ICL7665, ICL7665A,
V+ = 15V,
T A = T MIN to T MAX
OUT1, OUT2
2000
nA
HYST1, HSYT2
-500
ICL7665B, V+ = 9V,
T A = T MIN to T MAX
OUT1, OUT2
2000
HYST1, HSYT2
-500
ICL7665, ICL7665B: V+ = 2V
0.20
0.50
ICL7665A: V+ = 2V
0.20
V OUT1 Saturation
Voltage
V SET1 = 2V,
I OUT1 = 2mA
All grades: V+ = 5V
0.10
0.30
V
ICL7665, ICL7665A: V+ = 15V
0.06
0.20
ICL7665B: V+ = 9V
0.06
0.25
All grades: V+ = 2V
-0.15
-0.30
V HYST1 Saturation
Voltage
V SET1 = 2V,
I HYST1 = -0.5mA
All grades: V+ = 5V
-0.05
-0.15
V
ICL7665, ICL665A: V+ = 15V
-0.02
-0.10
ICL7665B: V+ = 9V
-0.02
-0.15
All grades: V+ = 2V
0.20
0.50
V OUT2 Saturation
Voltage
V SET2 = 0V,
I OUT2 = 2mA
All grades: V+ = 5V
0.15
0.30
V
ICL7665, ICL665A: V+ = 15V
0.11
0.25
ICL7665B: V+ = 9V
0.11
0.30
V SET2 = 2V,
I HYST2 = -0.2mA
All grades: V+ = 2V
-0.25
-0.80
V HYST2 Saturation
Voltage
All grades: V+ = 5V
-0.43
-1.00
V
V SET2 = 2V,
I HYST2 = -0.5mA
ICL7665: V+ = 15V
-0.35
-0.80
ICL7665A: V+ = 15V
-0.35
-1.00
ICL7665B: V+ = 9V
-0.35
-1.00
V SET Input Leakage
Current
I SET
GND £ V SET £ V+
±0.01
±10
nA
V SET Input Change for
Complete Output
Change
Difference in Trip
Voltage
Output/Hysteresis
Difference
D V SET
R OUT = 4.7k W , R HYST = 20k W ,
V OUT LO = 1% V+, V OUT HI = 99% V+
0.1
mV
V SET1 –
V SET2
R OUT , R HYST = 1M W
±5
±50
mV
R OUT , R HYST = 1M
W
±0.1
mV
_______________________________________________________________________________________ 3
131540551.037.png
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
AC OPERATING CHARACTERISTICS
(V+ = 5V, T A = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
t SO1d
85
V SET switched from 1.0V to 1.6V,
R OUT = 4.7k
Output Delay Time,
Input Going High
t SH1d
½
, C L = 12pF,
90
µs
t SO2d
55
R HYST = 20k
½
t SH2d
55
t SO1d
75
V SET switched from 1.6V to 1.0V,
R OUT = 4.7k
Output Delay Time,
Input Going Low
t SH1d
½
, C L = 12pF,
80
µs
t SO2d
60
R HYST = 20k
½
t SH2d
60
t O1r
0.6
V SET switched between 1.0V and 1.6V,
R OUT = 4.7k
Output Rise Times
t O2r
½
, C L = 12pF,
0.8
µs
t H1r
7.5
R HYST = 20k
½
t H2r
0.7
t O1f
0.6
V SET switched between 1.0V and 1.6V,
R OUT = 4.7k
Output Fall Times
t O2f
½
, C L = 12pF,
0.7
µs
t H1f
4.0
R HYST = 20k
½
t H2f
1.8
_______________________________________________________Switching Waveforms
1.6V
INPUT
V SET1, V SET2
1.0V
t SO1d
t SO1d
V+ (5V)
OUT1
t O1f
t O1r
GND
t SH1d
V+ (5V)
HYST1
t H1r
GND
t SH1d
t H1f
t SO2d
t SO2d
V+ (5V)
OUT2
t O2r
t O2f
GND
V+ (5V)
t SH2d
HYST2
t SH2d
GND
t H2r
t H2f
4 _______________________________________________________________________________________
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Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
__________________________________________Typical Operating Characteristics
(T A = +25°C, unless otherwise noted.)
OUT1 SATURATION VOLTAGE AS A
FUNCTION OF OUTPUT CURRENT
SUPPLY CURRENT AS A
FUNCTION OF SUPPLY VOLTAGE
SUPPLY CURRENT AS A
FUNCTION OF AMBIENT TEMPERATURE
5.0
4.5
4.0
5.0
2.0
0V
£
V SET1 , V SET2
£
V+
0V
£
V SET1 , V SET2
£
V+
4.5
V+ = 2V
V+ = 15V
V+ = 9V
4.0
1.5
3.5
T A = -20°C
3.5
V+ = 5V
V+ = 9V
V+ = 15V
3.0
3.0
T A = +25°C
T A = +70°C
1.0
2.5
2.5
2.0
2.0
1.5
1.5
0.5
V+ = 2V
1.0
1.0
0.5
0.5
0
0
0
0
5
10
15
20
0
2
4
6
8
10
12
14
16
-20
0
20
40
60
I OUT OUT1 (mA)
SUPPLY VOLTAGE (V)
AMBIENT TEMPERATURE (°C)
HYST1 OUTPUT SATURATION VOLTAGE
vs. HYST1 OUTPUT CURRENT
HYST2 OUTPUT SATURATION VOLTAGE
vs. HYST2 OUTPUT CURRENT
OUT2 SATURATION VOLTAGE AS A
FUNCTION OF OUTPUT CURRENT
0
0
2.0
-0.4
-1
V+ = 15V
1.5
V+ = 2V
V+ = 5V
V+ = 9V
V+ = 15V
-0.8
-2
V+ = 15V
V+ = 9V
V+ = 5V
1.0
V+ = 9V
-1.2
-3
V+ = 5V
V+ = 2V
0.5
-1.6
-4
V+ = 2V
-2.0
-5
0
-20
-16
-12
-8
-4
0
-5
-4
-3
-2
-1
0
0
5
10
15
20
HYST1 OUTPUT CURRENT (mA)
HYST2 OUTPUT CURRENT (mA)
I OUT OUT2 (mA)
_______________________________________________________________________________________ 5
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