Renesas ICL7665SACPA

Overview

ICL7665SACPA from Intersil is a dual CMOS micropower over/under voltage detector in an 8-lead PDIP package, featuring two independently programmable comparators with 1.3V internal bandgap reference, 3μA typical supply current, and ±5mV trip voltage matching between channels-designed for battery-operated systems requiring precise low-voltage warning and fault monitoring in portable instrumentation and memory backup circuits.

For engineers reviewing the ICL7665SACPA datasheet, ICL7665SACPA pinout, ICL7665SACPA application, or ICL7665SACPA equivalent, key selection considerations include guaranteed 10µA max quiescent current over temperature, 2% threshold accuracy (ICL7665SA variant), 100ppm/°C temperature coefficient, and open-drain N/P-channel output architecture enabling flexible wired-OR power-OK signaling and hysteresis programming via external resistors.

Technical Context

The ICL7665SACPA implements two independent high-impedance input comparators referencing a stable 1.3V bandgap source, each driving open-drain N-channel (OUT1/OUT2) and P-channel (HYST1/HYST2) outputs. Its architecture supports fully decoupled upper/lower trip point configuration with externally adjustable hysteresis via resistor networks connected to SET and HYST pins.

Operating from 1.6V to 16V supply across 0°C to +70°C, it delivers 20mA sink capability on OUTx and ±25mA source/sink on HYSTx, with propagation delays under 90µs and input leakage below 10nA-enabling reliable detection in low-power brownout, battery disconnect, and multi-rail fault monitor applications without external biasing.

Key Specifications

Pinout & Package

ICL7665SACPA uses an 8-lead PDIP (Plastic Dual-In-Line Package), JEDEC MS-001-BA compliant, with 0.300-inch body width, 0.100-inch lead pitch, and through-hole mounting. Pin 1 is marked by a notch or dot; leads are tin-plated, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV7032IDR and MAX6375CSA+, the ICL7665SACPA uniquely integrates dual programmable comparators with internal 1.3V reference and complementary open-drain outputs, enabling true over/under voltage supervision with hardware-configurable hysteresis - essential for battery management and fault-tolerant power systems where flexibility and reliability outweigh minimal quiescent current savings.

Availability

ICL7665SACPA is available at Aetrix Electronics and suitable for portable instrumentation, battery backup monitoring, and charging system fault detection requiring stable component supply across commercial temperature range (0°C to +70°C) and long-term production continuity.

Supply support for ICL7665SACPA 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

Intersil Corporation, now part of Renesas Electronics, designs precision analog and power management ICs with emphasis on low-power, high-reliability performance for industrial, computing, and portable applications.

The ICL7665S product line delivers micropower voltage supervision solutions with integrated references and programmable hysteresis, targeting battery-operated equipment needing robust fault detection without software intervention.

FAQ

What is the maximum supply voltage rating for the ICL7665SACPA?

The ICL7665SACPA has an absolute maximum supply voltage of +18V, but its specified operating range is 1.6V to 16V. Operation above 16V may cause latchup due to SCR structure inherent in the CMOS process, especially if inputs exceed V+ + 0.3V or fall below GND – 0.3V. Always limit V+ to ≤16V for reliable operation per the ICL7665SACPA datasheet.

Can the ICL7665SACPA be used to monitor negative supply voltages?

Yes, the ICL7665SACPA can monitor negative supplies when configured with appropriate resistor dividers referenced to GND. For example, connecting SET1 to a voltage divider from –5V to GND allows detection of –4.5V undervoltage. However, all inputs must remain within GND – 0.3V to V+ + 0.3V, so V+ must be ≥0V and GND remains the reference. The ICL7665SACPA itself does not operate from negative supplies.

Does the ICL7665SACPA provide hysteresis by default, or must it be added externally?

Hysteresis must be added externally using the HYST1 and HYST2 pins. The ICL7665SACPA has no internal hysteresis; instead, it provides dedicated open-drain P-channel outputs that short portions of the external SET resistor network when tripped. This architecture allows precise, resistor-programmable hysteresis (e.g., 20–200mV) tailored to each detector channel independently - a key differentiator from fixed-hysteresis supervisors.

What is the purpose of the HYST1 and HYST2 pins on the ICL7665SACPA?

The HYST1 and HYST2 pins are open-drain P-channel outputs that source current when their respective comparator trips (VSET1 > 1.3V or VSET2 > 1.3V). They are designed to connect directly into the feedback path of the SET1/SET2 resistor dividers, dynamically altering the effective trip point to introduce hysteresis. This eliminates the need for external op-amps or comparators in hysteresis implementation - a core feature of the ICL7665SACPA architecture.

Is the ICL7665SACPA RoHS compliant and suitable for wave soldering?

Yes, the ICL7665SACPA is RoHS compliant (Pb-free) and qualified for through-hole wave soldering per manufacturer specifications. Its PDIP package is explicitly rated for wave solder processing only - reflow soldering is not recommended due to thermal stress limitations. Peak wave temperature must not exceed 260°C for ≤10 seconds, and board design must accommodate 0.300-inch DIP footprint per JEDEC MS-001-BA outline E8.3.