Analog Devices Inc./Maxim Integrated MAX4668CPE

Overview

MAX4668CPE from Maxim Integrated is a dual, normally open (NO), single-pole single-throw (SPST) CMOS analog switch with 2.5Ω maximum on-resistance, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and rail-to-rail signal handling. It delivers matched on-resistance (≤0.4Ω between channels), flat on-resistance (≤0.5Ω over signal range), and 5nA max off-leakage at +85°C - ideal for precision test equipment and audio routing where low distortion and high reliability are critical.

For engineers reviewing the MAX4668CPE datasheet, MAX4668CPE pinout, MAX4668CPE application, or MAX4668CPE equivalent, key selection considerations include its NO-switch configuration, 16-pin plastic DIP package, guaranteed break-before-make exclusion (vs. MAX4669), TTL/CMOS-compatible logic thresholds, and performance across industrial temperature range (0°C to +70°C).

Technical Context

The MAX4668CPE implements two independent SPST analog switches with complementary control logic: IN1 and IN2 directly enable NO1 and NO2 conduction when driven high. Its CMOS architecture supports bidirectional rail-to-rail analog signals from V− to V+, with internal protection diodes clamping inputs beyond supply rails.

It operates with separate analog supplies (V+, V−) and logic supply (VL), enabling level-shifted control in mixed-voltage systems. All digital inputs meet TTL/CMOS thresholds (+0.8V low, +2.4V high) under ±15V or +12V supply conditions, ensuring robust interfacing with standard microcontrollers and logic families.

Key Specifications

Pinout & Package

MAX4668CPE uses a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard PCB layouts and socketing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4668CPE, MAX4668EPE extends thermal capability without altering electrical behavior, while ADG1419BRZ trades dual-supply support and leakage performance for lower on-resistance in battery-powered designs.

Availability

MAX4668CPE is available at Aetrix Electronics and suitable for reed relay replacement, audio-signal routing, and test equipment signal switching requiring stable component supply and long-term industrial availability.

Supply support for MAX4668CPE 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, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The MAX4667/MAX4668/MAX4669 family was designed specifically for high-fidelity, high-reliability analog signal routing in automatic test equipment and mission-critical systems where mechanical relays fall short.

FAQ

What is the operating temperature range for MAX4668CPE?

The MAX4668CPE is rated for 0°C to +70°C ambient operation. This commercial-grade temperature range is validated per the device's ordering information and absolute maximum ratings table. The 'C' prefix in MAX4668CPE explicitly denotes the 0°C to +70°C grade, distinguishing it from the 'E' grade (–40°C to +85°C) versions like MAX4668EPE. Thermal derating applies above +70°C per the plastic DIP power dissipation specification.

Does MAX4668CPE support break-before-make switching?

No, MAX4668CPE does not support break-before-make (BBM) operation. It is a dual normally open (NO) switch with independent control inputs (IN1, IN2), and its truth table shows no guaranteed overlap or timing control between channel transitions. BBM is only guaranteed for the MAX4669 variant (one NO + one NC switch). Using MAX4668CPE in BBM-sensitive applications requires external timing control or additional logic to prevent momentary shorts.

Can MAX4668CPE operate from a single +5V supply?

No, MAX4668CPE cannot operate from a single +5V supply. Its minimum single-supply voltage is +4.5V, but functional performance (especially RON and leakage) is only specified down to +12V in single-supply mode per the Electrical Characteristics tables. At +5V, RON increases significantly (>10Ω typical), and logic thresholds may not be reliably met. For true 5V operation, consider alternatives like the ADG1419 or MAX4617.

What is the purpose of the VL pin on MAX4668CPE?

The VL pin on MAX4668CPE provides a dedicated logic supply input, decoupled from the analog supplies (V+, V−). It sets the reference for digital input thresholds and must be connected to a stable +5V source (or other logic-compatible voltage) with local 0.1µF bypassing. This separation allows independent optimization of analog signal integrity and logic interface robustness - especially critical when V+ and V− are at ±15V while control logic runs at +5V or +3.3V.

How is the MAX4668CPE pinout different from MAX4667CPE and MAX4669CPE?

All three variants - MAX4667CPE (dual NC), MAX4668CPE (dual NO), and MAX4669CPE (one NC + one NO) - share identical 16-pin DIP pinouts and package dimensions. The functional difference lies solely in internal switch configuration: MAX4668CPE connects IN1→NO1/COM1 and IN2→NO2/COM2, whereas MAX4667CPE routes those same pins to NC terminals, and MAX4669CPE assigns IN1 to NC1/COM1 and IN2 to NO2/COM2. No PCB layout change is needed when substituting within this family.