ICL7665CPA ,Microprocessor Voltage Monitor withICL766519-0001; Rev 2; 8/97Microprocessor Voltage Monitor withDual Over/Undervoltage Detection_____ ..
ICL7665CSA ,Microprocessor Voltage Monitor withELECTRICAL CHARACTERISTICS(V+ = 5V, T = +25°C, unless otherwise noted.)APARAMETER SYMBOL CONDITIONS ..
ICL7665CSA ,Microprocessor Voltage Monitor withGeneral Description ________
ICL7665CSA ,Microprocessor Voltage Monitor withICL766519-0001; Rev 2; 8/97Microprocessor Voltage Monitor withDual Over/Undervoltage Detection_____ ..
ICL7665CSA ,Microprocessor Voltage Monitor withApplicationsICL7665BCPA 0°C to +70°C 8 Plastic DIPµP Voltage Monitoring ICL7665CSA 0°C to +70°C 8 S ..
ICL7665CSA+ ,µP Voltage Monitor with Dual Over/Undervoltage DetectionELECTRICAL CHARACTERISTICS(V+ = 5V, T = +25°C, unless otherwise noted.)APARAMETER SYMBOL CONDITIONS ..
IDT72V70840DA , 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH
IDT72V71660BB , 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 16,384 X 16,384
IDT72V73260BB , 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 16,384 X 16,384
IDT72V811L15TF , 3.3 VOLT DUAL CMOS SyncFIFO™
IDT72V815L10PF , 3.3 VOLT CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18
IDT72V815L10PF , 3.3 VOLT CMOS DUAL SyncFIFO DUAL 256 x 18, DUAL 512 x 18, DUAL 1,024 x 18, DUAL 2,048 x 18
ICL7665ACPA-ICL7665ACSA-ICL7665AEPA-ICL7665AESA-icl7665bcja-ICL7665BCPA-ICL7665BCSA-ICL7665CPA-ICL7665CSA-ICL7665CTV
Microprocessor Voltage Monitor with
_______________General DescriptionThe ICL7665 warns microprocessors (mPs) 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
VSET1threshold 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.
________________________ApplicationsµP 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
____________________________FeaturesµP Over/Undervoltage WarningImproved Second SourceDual Comparator with Precision Internal Reference3µA Operating Current2% Threshold Accuracy (ICL7665A)1.6V to 16V Supply Voltage RangeOn-Board Hysteresis OutputsExternally Programmable Trip PointsMonolithic, Low-Power CMOS Design
______________Ordering Information
Ordering Information continued on last page.
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
_________________Pin Configurations
__________Typical Operating Circuit19-0001; Rev 2; 8/97
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(V+ = 5V, TA= +25°C, unless otherwise noted.)
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.
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 notbe 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.
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 (TA= +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
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
ELECTRICAL CHARACTERISTICS (continued)(V+ = 5V, TA= +25°C, unless otherwise noted.)
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
AC OPERATING CHARACTERISTICS(V+ = 5V, TA= +25°C, unless otherwise noted.)
_______________________________________________________Switching Waveforms
ICL7665
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
ICL7665
_______________Detailed DescriptionAs shown in the block diagram of Figure 2, the Maxim
ICL7665 combines a 1.3V reference with two com-
parators, two open-drain N-channel outputs, and two
open-drain P-channel hysteresis outputs. The refer-
ence and comparator are very low-power linear CMOS
circuits, with a total operating current of 10mA maxi-
mum, 3mA typical. The N-channel outputs can sink
greater than 10mA, but are unable to source any cur-
rent. These outputs are suitable for wire-OR connections
and are capable of driving TTL inputs when an external
pull-up resistor is added.
The ICL7665 Truth Table is shown in Table 1. OUT1 is
an inverting output; all other outputs are noninverting.
HYST1 and HYST2 are P-channel current sources
whose sources are connected to V+. OUT1 and OUT2
are N-channel current sinks with their sources connect-
ed to ground. Both OUT1 and OUT2 can drive at least
one TTL load with a VOLof 0.4V.
In spite of the very low operating current, the ICL7665
has a typical propagation delay of only 75ms. Since the
comparator input bias current and the output leakages
are very low, high-impedance external resistors can be
used. This design feature minimizes both the total sup-
ply current used and loading on the voltage source that
is being monitored.
Microprocessor Voltage Monitor with
Dual Over/Undervoltage Detection
