Analog Devices Inc./Maxim Integrated MAX4665CPE

Overview

MAX4665CPE from Maxim Integrated is a quad single-pole single-throw (SPST) analog switch with normally open (NO) configuration, designed for rail-to-rail signal routing in precision analog systems. It delivers 5Ω maximum on-resistance, 0.5Ω maximum on-resistance match between channels, and 5nA maximum off-leakage current at +85°C, enabling low-distortion audio-signal routing and reed-relay replacement in test equipment.

For engineers reviewing the MAX4665CPE datasheet, MAX4665CPE pinout, MAX4665CPE application, or MAX4665CPE equivalent, key selection criteria include guaranteed R_ON flatness over ±10V signal range, TTL/CMOS-compatible logic thresholds at ±15V or +12V supply, and dual-supply operation from ±4.5V to ±20V or single-supply operation from +4.5V to +36V.

Technical Context

The MAX4665CPE implements CMOS-based SPST switching architecture with independent channel control via four digital inputs (IN1–IN4), each driving one NO switch (NO1–NO4). Its internal charge-pump-free design ensures rail-to-rail analog conduction without level-shifting circuitry, supporting bidirectional signal flow across COM–NO paths.

All switches share common analog supplies (V+, V−), logic supply (VL), and ground (GND), with guaranteed break-before-make timing only in the MAX4666 variant - not applicable to MAX4665CPE. Input logic thresholds (+0.8V low, +2.4V high) are fixed and independent of supply voltage, ensuring robust interfacing with standard digital controllers.

Key Specifications

Pinout & Package

MAX4665CPE is housed in a 16-pin plastic DIP package (0.300" width), compatible with through-hole prototyping and legacy industrial PCBs. Pin numbering follows standard DIP layout with notch-left orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Compared with ADG451BRZ and TS5A3157DBVR, the MAX4665CPE uniquely supports both high-voltage operation (+36V/±20V) and precision matching (0.5Ω R_ON match), making it the only option qualified for wide-range industrial test and avionics multiplexing where supply flexibility and channel uniformity are jointly critical.

Availability

MAX4665CPE is available at Aetrix Electronics and suitable for reed relay replacement, audio-signal routing, and test equipment signal switching requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX4665CPE 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 U.S.-based semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and automotive markets.

The MAX4664/MAX4665/MAX4666 family was engineered for low-distortion, high-reliability analog signal routing in automatic test equipment and mission-critical systems where mechanical relay limitations-speed, lifetime, and size-must be overcome.

FAQ

What is the maximum supply voltage rating for MAX4665CPE?

The MAX4665CPE supports a single positive supply up to +36V or dual supplies from ±4.5V to ±20V. Absolute maximum ratings specify V+ to GND ≤ +44V and V− to GND ≥ −44V, but continuous operation must remain within the specified functional ranges to ensure reliability and parameter guarantees.

Does MAX4665CPE support rail-to-rail analog signal switching?

Yes, the MAX4665CPE supports rail-to-rail analog signal handling - signals from V− to V+ pass unattenuated through the ON switch path. This is confirmed in the General Description and Electrical Characteristics tables, where input voltage range is specified as V− to V+ across all operating conditions.

Is MAX4665CPE pin-compatible with MAX4664CPE or MAX4666CPE?

No, MAX4665CPE is not pin-compatible with MAX4664CPE or MAX4666CPE. While all three share the same 16-pin DIP package and pinout numbering, their terminal functions differ: MAX4664CPE uses NC (normally closed) switches, MAX4665CPE uses NO (normally open), and MAX4666CPE mixes both. Swapping them without redesigning logic control and signal routing will cause functional failure.

What is the guaranteed on-resistance match between channels for MAX4665CPE?

The MAX4665CPE guarantees on-resistance match (ΔR_ON) of 0.5Ω maximum between any two channels, measured as R_ON(MAX) − R_ON(MIN) at TA = TMIN to TMAX. This specification is explicitly listed in the Electrical Characteristics table under "On-Resistance Match Between Channels" for both dual- and single-supply conditions.

Can MAX4665CPE operate with VL disconnected or floating?

No, VL must be connected to a valid logic supply between +2.7V and +7V. The datasheet specifies VL as a required input for proper logic threshold definition and internal biasing. Leaving VL floating risks undefined logic behavior, increased supply current, and potential damage due to uncontrolled internal node voltages.