Analog Devices Inc./Maxim Integrated MAX4581ASE+T

Overview

MAX4581ASE+T from Maxim Integrated is an 8-channel CMOS analog multiplexer configured for rail-to-rail signal switching in low-voltage systems. It operates from ±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 MAX4581ASE+T datasheet, MAX4581ASE+T pinout, MAX4581ASE+T application, or MAX4581ASE+T equivalent, key selection criteria include guaranteed on-resistance matching across channels, automotive-grade temperature range (-40°C to +125°C), low distortion (<0.02% @ 600Ω), and compatibility with legacy 74HC4051 pinout and logic architecture.

Technical Context

The MAX4581ASE+T 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 lines (A/B/C) and an active-low ENABLE input, supporting break-before-make switching with <20ns tBBM and <5pC charge injection.

All analog I/O pins are bidirectional and interchangeable; internal ESD diodes clamp signals to VCC/VEE, requiring proper power sequencing (VCC first, then VEE). The device is fabricated in BICMOS process and features matched on-resistance flatness over ±3V signal range.

Key Specifications

Pinout & Package

MAX4581ASE+T is supplied in a 16-pin narrow SO package (SOIC-16, 150mil width) with standard 74HC4051-compatible pinout. Pin 1 is X0 (channel 0 input); pins 13–15 and 12,1,5,2,4 are X0–X7; pin 3 is X (common output); pins 11,10,9,8 are A,B,C,ENABLE; pins 16,7,6 are VCC,GND,VEE.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4581CSE+ and ADG708BRUZ, the MAX4581ASE+T uniquely combines automotive temperature qualification, guaranteed RON matching, and proven low-leakage performance - making it optimal for safety-critical or high-accuracy analog front-ends where long-term stability matters.

Availability

MAX4581ASE+T is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical devices, and industrial data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4581ASE+T 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX4581 family targets low-voltage, low-leakage analog signal routing - specifically engineered for battery-operated equipment and high-accuracy data-acquisition systems where rail-to-rail operation and thermal stability are critical.

FAQ

What is the maximum analog signal range supported by the MAX4581ASE+T?

The MAX4581ASE+T supports rail-to-rail analog signals from VEE to VCC. With ±5V supplies, this equals a ±5V range; with +5V single supply (VEE = GND), it supports 0V to +5V. Absolute maximum ratings allow VCC up to +13V and VEE down to -0.3V, but operational range is limited by supply choice - e.g., +12V single supply enables 0V to +12V signal handling. The MAX4581ASE+T must never see analog signals exceeding VCC or falling below VEE.

Does the MAX4581ASE+T require external level-shifting for 3.3V microcontroller control signals?

No, the MAX4581ASE+T does not require external level-shifting. Its digital inputs have TTL/CMOS-compatible thresholds (0.8V low, 2.4V high) that function correctly with 3.3V logic outputs. When VCC = +5V, the thresholds remain within spec; even at VCC = +12V, the high threshold rises only to ~3.1V - still compatible with 3.3V CMOS drivers. This eliminates added components and board space in mixed-voltage systems using the MAX4581ASE+T.

How does the MAX4581ASE+T handle power-supply sequencing, and what happens if VEE is applied before VCC?

The MAX4581ASE+T requires strict power-supply sequencing: VCC must be applied before VEE, followed by logic inputs and analog signals. If VEE is applied before VCC, internal ESD diodes may become forward-biased, causing excessive current flow and potential damage. The MAX4581ASE+T datasheet recommends adding external blocking diodes (D1, D2) in series with VCC and VEE if sequencing cannot be guaranteed - though this reduces usable analog range by one diode drop. Proper sequencing protects the MAX4581ASE+T's internal BICMOS structure.

Can the MAX4581ASE+T be used in a single-supply configuration with VEE tied to GND?

Yes, the MAX4581ASE+T fully supports single-supply operation with VEE tied to GND. In this mode, it operates from +2V to +12V on VCC, and analog signals swing from 0V to VCC. Key specs remain valid: on-resistance is 150Ω max at +5V, off-leakage is ≤5nA at +85°C, and logic thresholds adapt accordingly. The MAX4581ASE+T's internal architecture ensures rail-to-rail performance and TTL/CMOS compatibility even in single-supply mode - making it ideal for portable and industrial 3.3V/5V systems.

Is the MAX4581ASE+T pin-compatible with the industry-standard 74HC4051 multiplexer?

Yes, the MAX4581ASE+T is fully pin-compatible and functionally identical to the 74HC4051, including identical pin numbering (X0–X7, X, A/B/C, ENABLE, VCC, GND, VEE) and truth table. It also matches the MAX4051 pinout. This allows direct replacement in existing designs without PCB changes - while delivering superior performance: lower on-resistance (80Ω vs. typical 120Ω), lower leakage (1nA vs. 100nA), and extended temperature range (-40°C to +125°C vs. 0°C to +70°C).