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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:3,789
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Product details
Overview
ICL7665BCPA+ from Maxim Integrated is a dual over/undervoltage microprocessor supervisor IC with two independently programmable voltage detectors, 3µA typical quiescent current, 1.6V to 10V supply range (ICL7665B grade), and ±50mV VSET1–VSET2 mismatch. It monitors supply rails in battery-powered systems and delivers open-drain N-channel OUT1/OUT2 and open-drain P-channel HYST1/HYST2 outputs for hysteresis control.
For engineers reviewing the ICL7665BCPA+ datasheet, ICL7665BCPA+ pinout, ICL7665BCPA+ application, or ICL7665BCPA+ equivalent, this device supports low-battery detection, power-fail warning, brownout monitoring, and dual-threshold alarm generation using external resistor networks - critical for embedded system reliability and BOM optimization in portable and industrial equipment.
Technical Context
The ICL7665BCPA+ integrates a precision 1.3V bandgap reference, two high-impedance comparators (input leakage <±10nA), and four open-drain outputs: OUT1/OUT2 (N-channel sinks) and HYST1/HYST2 (P-channel sources tied to V+). Its trip points are set externally via resistive dividers on SET1/SET2 pins, enabling detection of voltages ≥1.3V across wide input ranges.
It operates from 1.6V to 10V (ICL7665B specification), exhibits 100ppm/°C VSET temperature coefficient, and delivers 75µs typical propagation delay. The device avoids destructive latchup through SCR-aware layout and requires input current limiting per Absolute Maximum Ratings when interfacing with off-supply sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 10V - supports single-cell Li-ion and multi-cell alkaline/battery systems without external regulators. |
| Quiescent Current | 2.5µA to 10µA (typ. 3µA) - enables >10-year battery life in always-on monitoring applications. |
| VSET1 Trip Voltage (25°C) | 1.150V to 1.450V - sets first detector threshold; externally adjustable via resistor divider on SET1 pin. |
| VSET2 Trip Voltage (25°C) | 1.200V to 1.400V - sets second detector threshold; independent programming enables asymmetric over/under thresholds. |
| VSET1–VSET2 Mismatch | ±50mV - ensures predictable separation between upper and lower trip points for stable hysteresis design. |
| Output Type | Open-drain N-channel (OUT1/OUT2) + open-drain P-channel (HYST1/HYST2) - enables wire-OR logic and bidirectional hysteresis control without external transistors. |
| Propagation Delay | 75µs typical - fast enough for real-time brownout response while maintaining ultra-low power. |
Pinout & Package
ICL7665BCPA+ uses an 8-pin plastic DIP package (0.300" width), RoHS-compliant and lead-free. Pin functions are validated per Maxim's official pin configuration diagram and truth table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT1 | N-channel open-drain output | Inverting output; sinks current when VSET1 exceeds 1.3V; drives TTL with external pull-up. |
| 2 - HYST1 | P-channel open-drain hysteresis output | Noninverting; sources current from V+ when VSET1 > 1.3V; used to add hysteresis to SET1 divider. |
| 3 - SET1 | Comparator 1 input | High-impedance node (leakage <±10nA); connected to resistor divider for first threshold setting. |
| 4 - GND | Analog ground reference | Return path for internal reference and comparator bias; must be low-impedance for accuracy. |
| 5 - SET2 | Comparator 2 input | Independent high-Z input for second threshold; supports separate over/undervoltage detection. |
| 6 - HYST2 | P-channel open-drain hysteresis output | Noninverting; sources current from V+ when VSET2 > 1.3V; adds hysteresis to SET2 network. |
| 7 - OUT2 | N-channel open-drain output | Inverting output; sinks current when VSET2 exceeds 1.3V; complements OUT1 for dual-alert logic. |
| 8 - V+ | Positive supply input | Power rail (1.6V–10V); also serves as source for HYST1/HYST2 outputs; substrate tied to V+. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent voltage detectors | Enables simultaneous overvoltage (OUT1) and undervoltage (OUT2) monitoring with separate trip points and hysteresis. |
| 1.3V precision internal reference | Stable bandgap reference with 100ppm/°C tempco; eliminates need for external references in most designs. |
| 3µA typical operating current | Reduces standby power in battery-backed memory, RTC, and portable instrumentation by >95% vs. legacy supervisors. |
| Externally programmable thresholds | Supports detection of any voltage ≥1.3V using standard resistor networks - no trimming required. |
| On-board hysteresis outputs (HYST1/HYST2) | Eliminates external transistors or comparators for hysteresis implementation; simplifies PCB layout and improves noise immunity. |
Applications
| Microprocessor Voltage Monitoring | Low-Battery Detection |
|---|---|
Use Scenario: Monitoring 5V or 3.3V microcontroller supply rails during startup, operation, and sleep modes. IC Role / Device Role / Timing Role: Dual-threshold supervisor generating NMI or reset signals when supply deviates beyond ±5% window. Use Value: Prevents code corruption and undefined MCU behavior by triggering controlled shutdown before brownout-induced state loss. |
Use Scenario: Detecting end-of-discharge in NiCd/NiMH battery packs powering portable medical devices. IC Role / Device Role / Timing Role: First detector (SET1) triggers low-battery LED at 6.0V; second (SET2) disconnects load at 5.0V with 800mV hysteresis. Use Value: Extends battery cycle life by preventing cell reversal and enabling graceful power-down before deep discharge. |
| Power-Fail and Brownout Detection | Battery Backup Switching |
Use Scenario: Providing early warning before regulated 5V output collapses due to AC line interruption or capacitor discharge. IC Role / Device Role / Timing Role: OUT2 asserts power-fail signal when raw DC input falls below 8.0V; 75µs response ensures ≥3.5ms warning margin. Use Value: Enables safe data save to nonvolatile memory and controlled system halt prior to VCC dropout. |
Use Scenario: Seamlessly transferring CMOS SRAM power from main 5V rail to 3V lithium backup cell during mains failure. IC Role / Device Role / Timing Role: OUT1 controls PNP pass transistor to disconnect main supply; OUT2 monitors backup cell voltage for low-battery alert. Use Value: Maintains memory integrity and eliminates need for external power-path controllers or diode-OR circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-threshold voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6326US29D3+ | Single-supply reset IC with fixed 2.93V threshold; no dual detection or external programming. | Only suitable for single-rail reset generation; lacks independent over/undervoltage capability. | Select only if application requires simple power-on reset without hysteresis or dual thresholds. |
| TPS3808G12DBVR | Adjustable watchdog timer + reset IC; 1.2V threshold, 350nA IQ, but no hysteresis outputs or dual comparators. | Designed for system-level supervision with timeout; not optimized for resistor-programmable dual-voltage alarms. | Prefer when combining reset, watchdog, and low-power monitoring - but requires external hysteresis circuitry. |
Compared with MAX6326US29D3+ and TPS3808G12DBVR, the ICL7665BCPA+ uniquely provides two fully independent, resistor-programmable voltage detectors with integrated hysteresis outputs - reducing component count by up to 4 discrete parts in over/undervoltage alarm designs.
Availability
ICL7665BCPA+ is available at Aetrix Electronics and suitable for microprocessor voltage monitoring, low-battery detection, and power-fail warning applications requiring stable component supply, long-term industrial availability, and RoHS-compliant packaging.
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) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The ICL7665BCPA+ belongs to Maxim's microprocessor supervisor product line, engineered specifically for ultra-low-power, dual-threshold voltage monitoring in battery-critical and fault-tolerant embedded systems.
FAQ
What is the supply voltage range for the ICL7665BCPA+?
The ICL7665BCPA+ operates from 1.6V to 10V, as specified for the ICL7665B grade in the Electrical Characteristics table. This range supports direct connection to single-cell Li-ion (2.7–4.2V), 3-cell alkaline (3.6–4.8V), and regulated 5V/3.3V rails without level-shifting. Operation outside this range risks permanent damage per Absolute Maximum Ratings.
How are the trip voltages programmed on the ICL7665BCPA+?
The ICL7665BCPA+ uses external resistor dividers on SET1 and SET2 pins to program trip points. When the voltage at SET1 or SET2 reaches the internal 1.3V reference, the corresponding comparator toggles. For example, a 1.3V threshold at SET1 with a 5V monitored rail requires R1/R2 = 2.85:1. Hysteresis is added via HYST1/HYST2 feedback resistors per Figures 4 and 5 in the datasheet.
Does the ICL7665BCPA+ provide hysteresis, and how is it implemented?
Yes - the ICL7665BCPA+ provides on-board hysteresis via dedicated HYST1 and HYST2 outputs. These P-channel open-drain sources inject current into the SET1/SET2 resistor networks when active, shifting the lower trip point downward. This eliminates external transistors and ensures clean, noise-immune switching near threshold voltages without oscillation.
What is the maximum sink current capability of the OUT1 and OUT2 pins on the ICL7665BCPA+?
The OUT1 and OUT2 pins of the ICL7665BCPA+ can each sink up to 25mA continuously, as stated in Absolute Maximum Ratings. In practice, typical saturation voltage is ≤0.25V at 2mA (V+ = 9V), making them capable of directly driving one TTL load or small LEDs with appropriate series resistors - no buffer stage required.
Can the ICL7665BCPA+ monitor voltages higher than its supply voltage?
Yes - the ICL7665BCPA+ can monitor input voltages from 1.3V up to several hundred volts using high-value resistor dividers on SET1/SET2. The internal comparators only see the divided voltage, not the full rail. However, input voltages must never exceed (V+ + 0.3V) or fall below (GND − 0.3V) to prevent SCR latchup, per Absolute Maximum Ratings Note 1.
ICL7665BCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- 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.
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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.
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