My Inquiry
My Account
Analog Devices Inc./Maxim Integrated ICL7665BCPA
- Part No.:
- ICL7665BCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7665BCPA.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,258
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ICL7665BCPA from Maxim Integrated is a dual over/undervoltage monitor IC for microprocessor supervision, featuring two independently programmable voltage detectors with 1.3V internal reference, 3µA typical supply current, ±50mV VSET1–VSET2 difference, and operation from 1.6V to 10V supply. It delivers low-power battery monitoring in portable systems requiring precise brownout and power-fail detection.
For engineers reviewing the ICL7665BCPA datasheet, ICL7665BCPA pinout, ICL7665BCPA application, or ICL7665BCPA equivalent, this device supports wire-OR power-OK signaling, TTL-compatible open-drain outputs, externally set trip points above 1.3V, and hysteresis via HYST1/HYST2 P-channel current sources - critical for noise-immune voltage supervision in embedded and industrial control designs.
Technical Context
The ICL7665BCPA integrates a precision 1.3V bandgap reference with two independent CMOS comparators, each driving an open-drain N-channel output (OUT1/OUT2) and an open-drain P-channel hysteresis output (HYST1/HYST2). Its comparator input bias current is under ±10nA, enabling high-impedance resistor-divider programming of trip thresholds.
It operates across 1.6V to 10V supply range (per ICL7665B grade), supports external hysteresis configuration using R31/R32, and exhibits 75µs typical propagation delay. The device uses monolithic low-power CMOS process with SCR latchup mitigation design, requiring input current limiting per Absolute Maximum Ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 10V - enables direct operation from single-cell Li-ion or multi-cell alkaline supplies without regulation |
| Quiescent Current | 2.5µA to 10µA - ensures multi-year battery life in always-on supervisory applications |
| VSET1 Trip Voltage (TYP) | 1.300V - sets lower comparator threshold; used with external resistors to define undervoltage trip point |
| VSET2 Trip Voltage (TYP) | 1.300V - sets upper comparator threshold; used with external resistors to define overvoltage trip point |
| VSET1–VSET2 Difference | ±50mV - allows fine-tuning of trip point separation for asymmetric hysteresis requirements |
| Output Type | Open-drain N-channel (OUT1/OUT2) + open-drain P-channel (HYST1/HYST2) - supports flexible pull-up/pull-down and wire-OR logic |
| Propagation Delay | 75µs typical - provides fast response to supply transients while maintaining low power |
Pinout & Package
ICL7665BCPA is housed in an 8-pin Plastic DIP package (0.300" wide), RoHS-compliant, with through-hole mounting and standard DIP thermal profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | N-channel open-drain output | Inverting output for undervoltage detection; sinks current when VSET1 > 1.3V; requires external pull-up |
| 2 (HYST1) | P-channel open-drain hysteresis output | Noninverting hysteresis source tied to V+; supplies current to R31 for lower trip point adjustment |
| 3 (SET1) | Undervoltage detector input | Comparator input referenced to 1.3V; voltage divider node defining undervoltage trip threshold |
| 4 (GND) | Analog ground reference | Return path for internal reference and comparator circuitry; must be low-impedance connection |
| 5 (SET2) | Overvoltage detector input | Comparator input referenced to 1.3V; voltage divider node defining overvoltage trip threshold |
| 6 (HYST2) | P-channel open-drain hysteresis output | Noninverting hysteresis source tied to V+; supplies current to R32 for lower trip point adjustment |
| 7 (OUT2) | N-channel open-drain output | Inverting output for overvoltage detection; sinks current when VSET2 > 1.3V; requires external pull-up |
| 8 (V+) | Positive supply input | Power rail for internal reference, comparators, and hysteresis outputs; supports 1.6V–10V operation |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage detectors | Enables simultaneous overvoltage (OUT2) and undervoltage (OUT1) monitoring on separate rails or thresholds |
| Externally programmable trip points | Allows setting detection thresholds >1.3V using resistor dividers - no trimming required for most applications |
| On-board hysteresis outputs (HYST1/HYST2) | Eliminates need for external hysteresis components; simplifies design of noise-immune threshold detection |
| 3µA typical operating current | Reduces standby power in battery-backed memory, real-time clocks, and portable instrumentation |
| Monolithic low-power CMOS design | Ensures stable performance across temperature with minimal self-heating and leakage-induced drift |
Applications
| Microprocessor Power Supervision | Battery Backup Switchover |
|---|---|
Use Scenario: Monitoring 5V system rail for brownout during AC mains interruption or regulator failure. IC Role / Device Role / Timing Role: Dual comparator generates synchronized OUT1 (undervoltage) and OUT2 (overvoltage) signals to trigger NMI or reset assertion before µP enters undefined state. Use Value: Prevents corrupted memory writes and processor lockup by delivering deterministic reset timing with 75µs response and configurable hysteresis. | Use Scenario: Seamless transition from main +5V supply to 3V lithium backup cell when line power fails. IC Role / Device Role / Timing Role: OUT1 controls PNP switch disconnecting main supply; OUT2 monitors backup battery voltage and activates low-battery LED at 2.6V. Use Value: Eliminates external comparators and discrete hysteresis networks - reduces BOM count by ≥4 components per switchover channel. |
| Low-Battery Detection | AC Power-Fail & Brownout Detection |
Use Scenario: Detecting end-of-discharge in 6-cell NiCd "9V" battery pack (7.2V nominal) for portable test equipment. IC Role / Device Role / Timing Role: SET1 configured for 6.0V warning (100mV hysteresis); SET2 for 5.0V disconnect (800mV hysteresis) to prevent cell reversal. Use Value: Achieves accurate voltage thresholds without potentiometers - leverages 2% VSET accuracy and <100ppm/°C tempco for stable field operation. | Use Scenario: Monitoring transformer secondary AC waveform to detect grid brownouts before DC bus collapse. IC Role / Device Role / Timing Role: OUT2 triggers power-fail warning after 42ms delay (2.5 line cycles) when peak rectified voltage drops below 10.2V. Use Value: Provides deterministic warning window (>3.5ms) before 7805 regulator dropout - enables safe data save and controlled shutdown. |
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+ | Single-supply reset IC with fixed 2.93V threshold; no dual independent detectors or hysteresis outputs | Suitable only for basic power-on reset, not over/undervoltage supervision with adjustable thresholds | Select ICL7665BCPA when dual programmable thresholds and hysteresis control are required |
| TLV809E29DBZR | Single-channel 2.93V supervisor with push-pull output; no hysteresis programming capability or second detector | Limited to single-rail monitoring; lacks wire-OR compatibility and external hysteresis flexibility | Choose ICL7665BCPA for applications needing two independent, resistor-programmable voltage windows |
Compared with MAX6326US29D3+ and TLV809E29DBZR, the ICL7665BCPA uniquely supports dual independent trip points, on-chip hysteresis current sources, and open-drain outputs for wired-logic combining - making it irreplaceable for multi-rail fault monitoring and battery switchover circuits where threshold customization and noise immunity are essential.
Availability
ICL7665BCPA is available at Aetrix Electronics and suitable for microprocessor voltage monitoring, battery backup switchover, and power-fail warning applications requiring stable component supply across industrial, medical, and embedded design cycles.
Supply support for ICL7665BCPA 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 analog, mixed-signal, and power-management ICs for industrial, automotive, and communications markets.
The ICL7665BCPA belongs to Maxim's legacy microprocessor supervisory product line, designed specifically for low-power, dual-threshold voltage monitoring in battery-operated and line-powered systems where precision, configurability, and reliability are critical.
FAQ
What is the supply voltage range supported by the ICL7665BCPA?
The ICL7665BCPA supports a supply voltage range of 1.6V to 10V, as specified for the ICL7665B grade. This range enables direct operation from single-cell Li-ion (2.7–4.2V), multi-cell alkaline (3–9V), or regulated 5V/3.3V rails without additional LDO regulation. Operation outside this range risks functional failure or permanent damage per Absolute Maximum Ratings.
How are the trip voltages programmed on the ICL7665BCPA?
The ICL7665BCPA trip voltages are programmed externally using resistor dividers connected to SET1 and SET2 pins. Each divider scales the monitored voltage so that the input to the comparator equals 1.3V at the desired trip point. For example, a 5.5V overvoltage trip requires R21/R11 = (5.5 − 1.3)/1.3 ≈ 3.23. Hysteresis is added via HYST1/HYST2 current sources and third resistors (R31/R32).
Does the ICL7665BCPA provide hysteresis, and how is it implemented?
Yes, the ICL7665BCPA provides user-configurable hysteresis via dedicated HYST1 and HYST2 P-channel open-drain outputs. When the comparator trips, the corresponding HYST pin sources current into an external resistor (R31 or R32), shifting the effective trip point downward to create hysteresis. This eliminates external comparators or Schmitt-trigger circuits and ensures noise immunity without sacrificing threshold accuracy.
What is the function of the OUT1 and OUT2 pins on the ICL7665BCPA?
OUT1 and OUT2 are open-drain N-channel outputs. OUT1 is inverting and asserts low when VSET1 exceeds 1.3V (undervoltage condition detected); OUT2 is inverting and asserts low when VSET2 exceeds 1.3V (overvoltage condition detected). Both require external pull-up resistors and support wire-OR logic for combined power-OK signaling - a key feature for system-level fault monitoring in the ICL7665BCPA.
Can the ICL7665BCPA monitor voltages higher than its supply voltage?
Yes, the ICL7665BCPA can monitor input voltages significantly higher than its V+ supply - up to several hundred volts - using high-value resistor dividers on SET1 and SET2. The internal comparator inputs draw only ±10nA, allowing megaohm-level dividers that minimize loading and quiescent current. However, absolute maximum input voltage is limited to (V+ + 0.3V) per SCR latchup precautions; external clamping may be required for transient protection.
ICL7665BCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active High
- Reset Timeout:
- <1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ICL7665BCPA FAQ
1.How can I place an order for ICL7665BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7665BCPA 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 ICL7665BCPA reliable?
The price and inventory of ICL7665BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7665BCPA is usually 5 days.
3.What payment methods are accepted for ICL7665BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7665BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7665BCPA?
ICL7665BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7665BCPA 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 ICL7665BCPA?
For technical support, including ICL7665BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7665BCPA requirements.
6.How does Aetrix verify that ICL7665BCPA is sourced from the original manufacturer or authorized distributors?
All ICL7665BCPA 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 ICL7665BCPA meets industry standards.
7.What is the process for return or replacement of ICL7665BCPA?
All ICL7665BCPA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7665BCPA, 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 ICL7665BCPA part is unused and in its original packaging.
Return procedure for ICL7665BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICL7665BCPA Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
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.
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…
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…
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…
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 …
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…
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…
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…
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…
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…
