Analog Devices Inc./Maxim Integrated MAX4604CPE

Overview

The MAX4604CPE from Maxim Integrated is a quad, single-pole single-throw (SPST), normally closed (NC) analog switch IC with 5Ω maximum on-resistance, 0.5Ω maximum on-resistance match between channels, and rail-to-rail signal handling capability across ±4.5V to ±20V dual supplies or +4.5V to +36V single supply. It delivers 2.5nA max off-leakage at +85°C and supports TTL/CMOS-compatible control inputs-ideal for reed relay replacement in automatic test equipment.

For engineers reviewing the MAX4604CPE datasheet, MAX4604CPE pinout, MAX4604CPE application, or MAX4604CPE equivalent, key selection criteria include guaranteed R_ON flatness (0.5Ω max), low charge injection (225pC typ), dual- or single-supply flexibility, and NC-switch topology for fail-safe signal path closure.

Technical Context

The MAX4604CPE implements a CMOS-based SPST analog switch architecture with four independent normally closed channels, each featuring matched and flat on-resistance over its full ±10V analog signal range. Its logic inputs accept 0.8V/2.4V thresholds for direct TTL/CMOS interfacing without level shifting when operated from ±15V or +12V supplies.

Internal ESD protection exceeds 2000V per Method 3015.7, and all analog terminals (COM, NC) tolerate signals beyond V+ and V− via clamping diodes-enabling robust operation in industrial signal routing where transient immunity and rail-to-rail dynamic range are critical.

Key Specifications

Pinout & Package

MAX4604CPE is housed in a 16-pin plastic DIP package (0.3-inch width), compatible with through-hole PCB assembly and socket-based prototyping. Pin spacing follows JEDEC MS-001 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4604CPE, MAX4604CSE offers identical switching performance in a surface-mount package ideal for high-density layouts, while ADG444BRZ provides lower R_ON but lacks NC topology and independent logic supply-making it unsuitable for fail-safe or mixed-rail applications.

Availability

MAX4604CPE is available at Aetrix Electronics and suitable for reed relay replacement, automatic test equipment, avionics signal conditioning, and audio-signal routing requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX4604CPE 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and automotive markets.

The MAX4604 series belongs to Maxim's precision analog switch product line, designed specifically for low-distortion, rail-to-rail signal routing in test, measurement, and safety-critical systems where mechanical relay limitations must be overcome.

FAQ

What is the operating temperature range for the MAX4604CPE?

The MAX4604CPE is specified for operation from 0°C to +70°C. This commercial-grade temperature range aligns with its C-suffix designation and makes it suitable for indoor industrial equipment, lab instruments, and non-extended-environment avionics subsystems. The device's leakage and R_ON parameters are fully characterized across this span, with off-leakage guaranteed ≤2.5nA at +85°C (derated stress condition). For extended temperature operation, consider the MAX4604EPE variant rated from -40°C to +85°C.

Does the MAX4604CPE require a separate logic supply voltage?

Yes, the MAX4604CPE uses a dedicated VL pin (Pin 12) for logic-level referencing, allowing independent 5V logic supply regardless of analog rail voltages. This decoupling ensures TTL/CMOS-compatible 0.8V/2.4V thresholds even when operating from ±15V analog supplies or +36V single supply. Unlike many analog switches, VL does not need to match V+ or V−, simplifying power architecture in mixed-voltage systems and eliminating level-shifter components when interfacing with 3.3V or 5V microcontrollers.

How does the normally closed (NC) configuration of the MAX4604CPE affect system behavior during power loss?

The MAX4604CPE's NC topology ensures that all four switch channels remain conductive (COM–NC path closed) when INx = 0, including during power-down or logic fault conditions. Since digital inputs float high by default without pull-downs, proper design requires external 10kΩ pull-down resistors on IN1–IN4 to guarantee fail-closed behavior. This intrinsic safety feature makes the MAX4604CPE appropriate for applications like sensor monitoring or emergency signal bypass where uninterrupted analog continuity is mandatory-even if the controlling MCU resets or loses power.

Can the MAX4604CPE handle bipolar analog signals without external level shifting?

Yes, the MAX4604CPE supports true rail-to-rail analog signal handling from V− to V+, including bipolar ranges such as ±10V or ±15V, without external level-shifting circuitry. Its CMOS switch core and internal charge-pump design allow signal voltages to extend 0.3V beyond the supply rails (per absolute maximum ratings), and its R_ON flatness remains ≤0.5Ω across the full ±10V range. This capability eliminates DC-blocking capacitors and associated distortion in precision instrumentation, making it suitable for direct coupling in oscilloscope front-ends and medical sensor interfaces.

What is the maximum allowable voltage difference between V+ and V− for the MAX4604CPE?

The MAX4604CPE permits a maximum voltage difference of 44V between V+ and V−, as defined in its Absolute Maximum Ratings. This allows operation up to ±20V dual supply (40V total) or +36V/0V single supply, with 4V margin for transient tolerance. Exceeding this differential risks permanent damage due to internal junction breakdown. When using external overvoltage protection diodes (as recommended in the datasheet), ensure their forward drop plus V+–V− remains within 44V-especially important in systems with unregulated or loosely coupled supplies.