Analog Devices Inc./Maxim Integrated MAX4581CSE+

Overview

MAX4581CSE+ from Maxim Integrated is an 8-channel CMOS analog multiplexer configured for rail-to-rail signal switching in low-voltage systems. It operates with ±2V to ±6V dual supplies or +2V to +12V single supply, delivers 80Ω on-resistance at ±5V, guarantees <1nA off-leakage at +25°C, and supports TTL/CMOS logic compatibility - enabling use in battery-powered data-acquisition front-ends.

For engineers reviewing the MAX4581CSE+ datasheet, MAX4581CSE+ pinout, MAX4581CSE+ application, or MAX4581CSE+ equivalent, key selection criteria include guaranteed on-resistance matching across channels, low distortion (<0.02% @ 600Ω), high off-isolation (–74dB @ 50Ω), and compatibility with industry-standard 74HC4051 pinout and logic diagrams.

Technical Context

The MAX4581CSE+ implements a single 8:1 analog multiplexer using CMOS transmission-gate architecture with independent VCC and VEE supply rails. Its digital control interface uses three address inputs (A, B, C) and an active-low ENABLE pin, supporting break-before-make switching with <20ns tBBM at +25°C.

All analog I/O pins are bidirectional and interchangeable, with internal ESD diodes clamping signals to VCC and VEE. Logic thresholds scale with VCC (e.g., 0.8V–2.4V at +5V), ensuring robust operation across supply voltages without external level-shifting.

Key Specifications

Pinout & Package

MAX4581CSE+ is housed in a 16-pin narrow SO package (SOIC-16, 3.9mm width), RoHS-compliant, with standard 1.27mm pitch and exposed pad not present (TQFN variant has EP; this SO version does not).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRZ and TS5A23157DGSR, the MAX4581CSE+ uniquely combines 8:1 functionality, guaranteed 80Ω RON at ±5V, sub-nA leakage, and wide +2V to +12V single-supply support - making it optimal for scalable, battery-aware analog signal routing where channel count and precision matter.

Availability

MAX4581CSE+ is available at Aetrix Electronics and suitable for industrial sensor multiplexing, portable medical instrumentation, automotive body control units, and audio signal routing requiring stable component supply and long-term production continuity.

Supply support for MAX4581CSE+ 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 demanding industrial, medical, and automotive applications.

The MAX4581 belongs to Maxim's low-voltage CMOS analog switch/multiplexer product line, engineered for rail-to-rail signal integrity, ultra-low leakage, and seamless integration into battery-powered and multi-supply systems.

FAQ

What is the maximum analog signal voltage range supported by the MAX4581CSE+?

The MAX4581CSE+ supports rail-to-rail analog signals from VEE to VCC. With ±5V supplies, this is –5V to +5V; with +5V single supply (VEE = GND), it is 0V to +5V. Absolute maximum ratings allow VCC up to +13V and VEE down to –0.3V, but signal range remains bounded by the applied VCC and VEE voltages. The MAX4581CSE+ must never see analog signals exceeding VCC or falling below VEE due to internal ESD diode conduction.

Does the MAX4581CSE+ require external pull-up or pull-down resistors on its address or enable pins?

No, the MAX4581CSE+ does not require external biasing on A, B, C, or ENABLE pins. Its logic inputs have defined TTL/CMOS-compatible thresholds (0.8V low, 2.4V high at +5V) and internal input current specs (±1µA typical). Direct connection to microcontroller GPIO or FPGA outputs is sufficient. ENABLE is active-low and internally referenced - tying it to VCC disables all channels; grounding enables switching.

Can the MAX4581CSE+ be used with a +3.3V single supply, and what performance trade-offs occur?

Yes, the MAX4581CSE+ operates from +2V to +12V single supply, including +3.3V. At +3.3V, typical on-resistance increases to ~190Ω (vs. 80Ω at ±5V), off-leakage remains ≤5nA at +85°C, and switching times lengthen (e.g., tTRANS up to 400ns). THD degrades slightly but stays below 0.05%. System design must verify signal swing, settling time, and RON-induced gain error meet requirements.

Is the MAX4581CSE+ pin-compatible with the 74HC4051, and are logic diagrams identical?

Yes, the MAX4581CSE+ is fully pin-compatible and functionally identical to the 74HC4051, including identical pinout (X0–X7, X, A/B/C, ENABLE, VCC, VEE, GND), truth table, and logic diagram per RCA CD4051 specifications. No PCB changes are needed for drop-in replacement. Electrical performance (lower RON, lower leakage, wider supply range) is superior, but timing and logic behavior match exactly.

What is the thermal performance of the MAX4581CSE+ in its narrow SO package at full load?

In the 16-pin narrow SO package, the MAX4581CSE+ has a thermal resistance θJA of 115°C/W. At maximum continuous power dissipation (696mW at +70°C ambient), junction temperature rise is ~80°C - resulting in ~150°C junction temp, exceeding absolute max rating. In practice, typical analog switching loads draw <100µA supply current, limiting power to <1mW and keeping junction temp within 5°C of ambient - well within safe operating area for 0°C to +70°C commercial range.