Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Supervisors

Analog Devices Inc./Maxim Integrated ICL7665CTV

Name: ICL7665CTV
Brand: Analog Devices Inc./Maxim Integrated
SKU: ICL7665CTV
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ICL7665CTV

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Supervisors

Package:: TO-99-8 Metal Can

Datasheet:: ICL7665CTV.pdf

Description:: IC SUPERVISOR MPU VOLT MONITOR

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:113

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ICL7665CTV from Maxim Integrated is a dual over/undervoltage microprocessor supervisor IC featuring two independently programmable voltage detectors, 3µA typical quiescent current, 1.6V–16V supply range, and on-board hysteresis outputs. It monitors voltages ≥1.3V using external resistor dividers and delivers open-drain N-channel (OUT1/OUT2) and open-drain P-channel (HYST1/HYST2) outputs for battery-backed memory protection and power-fail warning in portable instrumentation.

For engineers reviewing the ICL7665CTV datasheet, ICL7665CTV pinout, ICL7665CTV application, or ICL7665CTV equivalent, this device supports precise low-power voltage monitoring with externally set trip points, temperature-stable 1.3V internal reference, and latchup-protected CMOS design suitable for battery-powered systems requiring brownout detection and backup switchover control.

Technical Context

The ICL7665CTV integrates a 1.3V bandgap reference, two high-impedance comparators (input bias <10nA), and four dedicated output drivers: two N-channel sinks (OUT1/OUT2) and two P-channel sources (HYST1/HYST2). Its architecture enables independent upper/lower trip point configuration per channel via three-resistor networks, supporting hysteresis as low as 43mV or as high as several volts depending on resistor selection and supply voltage.

Operation is validated across 0°C to +70°C ambient, with supply sensitivity of 0.004%/V and VSET temperature coefficient of 100ppm/°C. Propagation delay is 75µs typical, and output saturation voltages are specified down to 0.06V (V+ = 15V, IOUT = 2mA) for OUT1 and –0.35V (V+ = 15V, IHYST = –0.5mA) for HYST1 - enabling direct TTL interfacing with pull-ups and robust noise immunity in noisy industrial environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.6V to 16V - supports single-cell Li-ion, multi-cell alkaline, and regulated 5V/12V rails without external regulators.
Quiescent Current	3µA typical - enables >1-year battery life in coin-cell–powered fault monitors and low-battery warning circuits.
Reference Voltage	1.3V ±50mV - stable internal bandgap used as comparator threshold; sets absolute trip accuracy when combined with precision external resistors.
Output Types	2× open-drain N-channel (OUT1/OUT2), 2× open-drain P-channel (HYST1/HYST2) - allows wire-OR logic, bidirectional hysteresis control, and mixed-voltage interface without level shifters.
Input Trip Accuracy	±150mV at +25°C (ICL7665), ±25mV at +25°C (ICL7665A) - determines minimum detectable voltage deviation before alarm assertion.
Operating Temperature	0°C to +70°C - qualified for commercial-grade embedded systems including portable test equipment and industrial controllers.
Propagation Delay	75µs typical - ensures timely response to rapid supply collapse during AC brownouts or battery depletion events.

Pinout & Package

ICL7665CTV uses an 8-pin TO-99 metal can package with case connected to V+. Pin functions are electrically isolated from the case; V+ (pin 8) serves as both power supply and substrate reference.

Pin/Terminal	Circuit Role	Design Meaning
1: OUT1	N-channel open-drain sink	Inverting output for first detector; pulls low when SET1 > 1.3V; requires external pull-up for logic-high state.
2: OUT2	N-channel open-drain sink	Inverting output for second detector; asserts low on undervoltage condition at SET2; compatible with TTL inputs.
3: SET2	Comparator 2 input	Voltage-sense node for second detector; biased by external resistor divider; input leakage <±10nA minimizes divider error.
4: SET1	Comparator 1 input	Voltage-sense node for first detector; identical electrical behavior to SET2; supports independent trip point programming.
5: GND	Analog ground reference	Return path for internal reference and comparator circuitry; must be tied to system ground with low-impedance connection.
6: HYST1	P-channel open-drain source	Noninverting hysteresis output for first detector; sources current to V+ when SET1 > 1.3V; enables programmable hysteresis feedback.
7: HYST2	P-channel open-drain source	Noninverting hysteresis output for second detector; provides positive feedback path to SET2 for noise-immune threshold switching.
8: V+	Positive supply & substrate	Power input (1.6V–16V); also connects internally to substrate; case is electrically tied to V+, requiring isolation from chassis ground.

Key Features

Feature	Design Value
Dual independent voltage detectors	Enables simultaneous monitoring of overvoltage (e.g., 5.55V) and undervoltage (e.g., 4.45V) on same rail or separate supplies without additional ICs.
Externally programmable trip points	Supports custom thresholds from 1.3V to >100V using standard resistor networks - eliminates need for multiple fixed-threshold supervisors.
On-board hysteresis outputs	HYST1/HYST2 provide active feedback paths that eliminate external hysteresis components and reduce PCB area by up to 30% in fault-monitor designs.
3µA quiescent current	Reduces standby power consumption by >95% versus discrete comparator solutions - critical for long-life battery applications like medical sensors.
1.3V precision internal reference	Stable bandgap reference with 100ppm/°C tempco enables accurate trip-point setting across temperature without calibration or trimming.
Latchup-protected CMOS process	SCR structure mitigated via input current limiting and supply ramp control - ensures reliability in hot-plug and multi-rail sequencing environments.

Applications

Power-Fail Warning System	Battery Backup Switchover
Use Scenario: Monitors unregulated DC input to a 7805 regulator, asserting power-fail warning before 5V output collapses. IC Role / Device Role / Timing Role: Dual comparator detects falling input voltage (e.g., <8.0V) and decaying 5V rail (<3.9V) to generate staged alerts. Use Value: Provides ≥3.5ms advance warning before 5V dropout, enabling safe memory write termination and controlled shutdown sequences.	Use Scenario: Switches CMOS memory supply from line power to lithium backup cell when main voltage drops below 3.5V. IC Role / Device Role / Timing Role: OUT1 controls PNP pass transistor; OUT2 monitors backup cell voltage (e.g., <2.6V) to light low-battery LED. Use Value: Prevents data corruption during brownout and avoids NiCd reverse-charging by disconnecting load at 5V (N−1 cell threshold).
Multi-Supply Fault Monitor	High/Low Temperature Alarm
Use Scenario: Simultaneously supervises +5V, −5V, and −15V rails in industrial PLC backplanes using shared SET inputs. IC Role / Device Role / Timing Role: First detector triggers on any supply dropping >10% below nominal; second detects negative rail absence or sag. Use Value: Reduces component count by 60% versus discrete op-amp solutions while maintaining independent trip hysteresis per rail.	Use Scenario: Uses NPN transistor V_BE as temperature sensor with voltage divider to drive SET1/SET2 inputs. IC Role / Device Role / Timing Role: Converts −5mV/°C V_BE drift into high-temp (e.g., >65°C) and low-temp (e.g., <5°C) digital alarms. Use Value: Eliminates thermistor linearization circuitry and ADC requirements - delivers ±2°C accuracy with <1% resistor tolerance.

Power-Fail Warning System

Battery Backup Switchover

Use Scenario: Monitors unregulated DC input to a 7805 regulator, asserting power-fail warning before 5V output collapses.

IC Role / Device Role / Timing Role: Dual comparator detects falling input voltage (e.g., <8.0V) and decaying 5V rail (<3.9V) to generate staged alerts.

Use Value: Provides ≥3.5ms advance warning before 5V dropout, enabling safe memory write termination and controlled shutdown sequences.

Use Scenario: Switches CMOS memory supply from line power to lithium backup cell when main voltage drops below 3.5V.

IC Role / Device Role / Timing Role: OUT1 controls PNP pass transistor; OUT2 monitors backup cell voltage (e.g., <2.6V) to light low-battery LED.

Use Value: Prevents data corruption during brownout and avoids NiCd reverse-charging by disconnecting load at 5V (N−1 cell threshold).

Multi-Supply Fault Monitor

High/Low Temperature Alarm

Use Scenario: Simultaneously supervises +5V, −5V, and −15V rails in industrial PLC backplanes using shared SET inputs.

IC Role / Device Role / Timing Role: First detector triggers on any supply dropping >10% below nominal; second detects negative rail absence or sag.

Use Value: Reduces component count by 60% versus discrete op-amp solutions while maintaining independent trip hysteresis per rail.

Use Scenario: Uses NPN transistor V_BE as temperature sensor with voltage divider to drive SET1/SET2 inputs.

IC Role / Device Role / Timing Role: Converts −5mV/°C V_BE drift into high-temp (e.g., >65°C) and low-temp (e.g., <5°C) digital alarms.

Use Value: Eliminates thermistor linearization circuitry and ADC requirements - delivers ±2°C accuracy with <1% resistor tolerance.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-voltage-monitor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX6326US29D3+	Fixed 2.93V reset threshold, no external trip programming, 1µA quiescent current, SOT23-3 package	Single-supply reset only; lacks dual-channel flexibility and hysteresis outputs	Choose for ultra-low-power, space-constrained single-rail reset where programmability is unnecessary.
TLV809E29DBZR	Fixed 2.93V threshold, push-pull output, 0.5µA quiescent current, SOT23-3	No hysteresis control, no dual independent detectors, no P-channel HYST outputs	Select when only basic power-on reset is needed and board layout prohibits external resistor networks.

Compared with MAX6326US29D3+ and TLV809E29DBZR, the ICL7665CTV offers unique dual-programmable thresholds, integrated hysteresis sourcing capability, and wide 1.6V–16V operation - making it irreplaceable in multi-rail supervision, battery switchover, and analog sensor interface applications requiring field-adjustable trip points.

Availability

ICL7665CTV is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power-supply fault monitoring, and embedded microprocessor reset management requiring stable component supply across extended product lifecycles.

Supply support for ICL7665CTV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The ICL7665 family was designed specifically for low-power, high-accuracy voltage supervision in microprocessor-based systems - emphasizing programmability, minimal quiescent current, and robust latchup immunity in harsh electrical environments.

FAQ

What is the function of the HYST1 and HYST2 pins on the ICL7665CTV?

The HYST1 and HYST2 pins on the ICL7665CTV are open-drain P-channel outputs that source current to V+ when their respective SET inputs exceed 1.3V. They enable external hysteresis feedback loops by connecting to the SET resistor dividers - raising the effective upper trip point while leaving the lower trip point unchanged. This prevents chatter near threshold due to noise or slow-moving supply transients. Each HYST pin operates independently, allowing asymmetric hysteresis per channel in the ICL7665CTV.

Can the ICL7665CTV monitor voltages higher than its 16V supply rail?

Yes, the ICL7665CTV can monitor input voltages significantly higher than its 16V V+ supply - up to several hundred volts - using appropriately scaled external resistor dividers on the SET1 and SET2 pins. The internal comparators reference only the 1.3V bandgap, so the divider ratio determines the absolute monitored voltage. Input leakage current is <±10nA, permitting high-impedance dividers (e.g., 10MΩ/100kΩ) that draw <1µA from the monitored rail, preserving measurement accuracy and minimizing loading in high-voltage applications.

What is the maximum sink current capability of OUT1 and OUT2 in the ICL7665CTV?

The OUT1 and OUT2 pins of the ICL7665CTV are N-channel open-drain outputs rated for a maximum sink current of 25mA each, with saturation voltage as low as 0.06V at V+ = 15V and I_OUT = 2mA. This allows direct driving of LEDs, small relays, or TTL inputs with appropriate pull-up resistors. At 2mA load, VOL remains ≤0.3V across the full 1.6V–16V supply range, ensuring reliable logic-level compatibility without additional buffering in the ICL7665CTV.

How does the ICL7665CTV differ from the ICL7665A variant?

The ICL7665CTV is the base-grade version with ±150mV trip voltage tolerance at +25°C, while the ICL7665ACTV offers ±25mV tolerance and guaranteed 2% accuracy over temperature. Both share identical pinout, package (TO-99), and functional architecture. The "A" suffix denotes tighter VSET1/VSET2 initial accuracy and improved temperature stability - critical for applications like precision power sequencing or calibrated sensor alarms where drift must remain under ±50mV from –40°C to +85°C.

Is the TO-99 package of the ICL7665CTV lead-free compliant?

No, the ICL7665CTV in TO-99 packaging is not RoHS/lead-free compliant - its solder composition contains lead per Maxim's legacy industrial-grade specification. The "+" suffix (e.g., ICL7665ACPA+) indicates RoHS-compliant versions, but those are only available in SO and PDIP packages. For new designs requiring lead-free compliance, Aetrix recommends evaluating the ICL7665ACSA or ICL7665AEPA+ variants, as no lead-free TO-99 option exists for the ICL7665CTV.

ICL7665CTV Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: TO-99-8 Metal Can

Packaging:: Bulk

Product Status:: Active

Programmable:: Not Verified

Type:: Monitor

Number of Voltages Monitored:: 2

Voltage - Threshold:: Adjustable/Selectable

Output:: Open Drain or Open Collector

Reset:: -

Reset Timeout:: -

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-99-8

ICL7665CTV FAQ

1.How can I place an order for ICL7665CTV through Aetrix?

Please submit a Request for Quotation (RFQ) for ICL7665CTV on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ICL7665CTV reliable?

The price and inventory of ICL7665CTV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7665CTV is usually 5 days.

3.What payment methods are accepted for ICL7665CTV?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7665CTV transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ICL7665CTV?

ICL7665CTV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ICL7665CTV order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ICL7665CTV?

For technical support, including ICL7665CTV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7665CTV requirements.

6.How does Aetrix verify that ICL7665CTV is sourced from the original manufacturer or authorized distributors?

All ICL7665CTV products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ICL7665CTV meets industry standards.

7.What is the process for return or replacement of ICL7665CTV?

All ICL7665CTV units undergo pre-shipment inspection (PSI). If there is an issue with ICL7665CTV, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ICL7665CTV part is unused and in its original packaging.

Return procedure for ICL7665CTV:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…