Analog Devices Inc./Maxim Integrated MAX4581LESE+

Overview

MAX4581LESE+ 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, features 80Ω on-resistance (±5V), <1nA off-leakage at +25°C, and TTL/CMOS-compatible logic inputs-enabling use in battery-powered data-acquisition front-ends and audio routing circuits.

For engineers reviewing the MAX4581LESE+ datasheet, MAX4581LESE+ pinout, MAX4581LESE+ application, or MAX4581LESE+ equivalent, key selection criteria include guaranteed on-resistance matching across channels, break-before-make timing (<20ns), low charge injection (≤5pC), high off-isolation (–74dB @50Ω), and compatibility with industry-standard 74HC4051 pinout and logic diagrams.

Technical Context

The MAX4581LESE+ implements a single 8:1 analog multiplexer using CMOS transmission-gate architecture with independent VCC and VEE supply rails. Its digital control interface accepts three address lines (A/B/C) and an active-low ENABLE input, supporting full channel selection via binary decoding per Table 1.

All analog I/O pins are bidirectional and interchangeable; internal ESD diodes clamp signals to VCC and VEE, enabling rail-to-rail analog swing. Logic-level translators isolate digital control circuitry from analog supply domains, ensuring TTL/CMOS compatibility across supply voltages from +2.7V to +12V.

Key Specifications

Pinout & Package

MAX4581LESE+ is supplied in a 16-pin narrow SO (SOIC) package with exposed pad (RoHS-compliant, lead-free). Pin functions are defined per Maxim's MAX4581-specific nomenclature and match 74HC4051 pinout and logic behavior.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4051ACPE+, MAX4581LESE+ delivers lower on-resistance and distortion for audio/data acquisition, while ADG1408BRUZ offers superior RON at the cost of supply flexibility-making MAX4581LESE+ the optimal balance of performance, voltage range, and interoperability with legacy 74HC4051 layouts.

Availability

MAX4581LESE+ is available at Aetrix Electronics and suitable for battery-operated equipment, audio and video signal routing, and low-voltage data-acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for MAX4581LESE+ 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 industrial, automotive, and communications markets.

The MAX4581 family targets low-voltage, high-fidelity analog signal routing in space-constrained and power-sensitive applications-emphasizing rail-to-rail operation, low leakage, and pin compatibility with industry-standard 74HC4051 logic.

FAQ

What supply configurations does the MAX4581LESE+ support?

The MAX4581LESE+ supports both dual-supply (±2V to ±6V) and single-supply (+2V to +12V) operation. When using single supply, VEE must be tied to GND. The device maintains rail-to-rail analog signal handling across all valid supply combinations, and logic thresholds automatically scale with VCC-ensuring reliable interface with 3.3V or 5V controllers without external level shifting. MAX4581LESE+ is rated for operation from –40°C to +125°C.

How does the MAX4581LESE+ handle analog signal directionality?

The MAX4581LESE+ features fully bidirectional analog paths: any X0–X7 pin may serve as input or output, and the X pin functions identically as common terminal. Signals pass with equal integrity in either direction, and there is no internal ground reference for analog signals-they are bounded solely by VCC and VEE. This design eliminates polarity constraints in AC-coupled or differential signal routing applications. MAX4581LESE+ maintains specified RON, leakage, and isolation regardless of signal flow direction.

What is the significance of the "L" suffix in MAX4581LESE+?

The "L" in MAX4581LESE+ denotes the automotive-grade temperature range variant (–40°C to +125°C), distinct from commercial (C), extended (E), or standard industrial (A) versions. It is not a functional or electrical variant-electrical specifications (RON, leakage, THD, etc.) are identical to other MAX4581 variants within their respective temperature ranges. The "L" suffix confirms qualification per AEC-Q100 stress test requirements for automotive applications. MAX4581LESE+ is supplied in RoHS-compliant narrow SO package.

Can the MAX4581LESE+ replace a 74HC4051 in existing designs?

Yes-the MAX4581LESE+ is pin-compatible and functionally identical to the 74HC4051, including matching pinout, truth table, and logic diagram per RCA CD4051 conventions. Electrical improvements include lower on-resistance (80Ω vs. ~120Ω), lower leakage (1nA vs. ~100nA), and enhanced THD (<0.02% vs. ~0.1%). No PCB changes are required for drop-in replacement, though designers should verify supply decoupling and ensure VEE is properly grounded for single-supply use. MAX4581LESE+ retains full backward compatibility while delivering measurable performance gains.

What layout considerations improve high-frequency performance of the MAX4581LESE+?

To maximize high-frequency performance of the MAX4581LESE+, minimize trace lengths between X0–X7/X pins and maintain tight 50Ω impedance control on critical paths. Place 0.1µF ceramic decoupling capacitors within 2mm of VCC and VEE pins, and tie the exposed pad (if present in TQFN variants) directly to VCC. Avoid routing digital address lines parallel to analog paths; use ground guard traces between adjacent channels to reduce crosstalk. MAX4581LESE+ achieves –74dB off-isolation at 1MHz, but performance degrades above 10MHz due to capacitive coupling-layout optimization is essential for >5MHz applications.