Analog Devices Inc./Maxim Integrated MAX4581EEE+

Overview

MAX4581EEE+ 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 MAX4581EEE+ datasheet, MAX4581EEE+ pinout, MAX4581EEE+ application, or MAX4581EEE+ equivalent, key selection criteria include guaranteed on-resistance matching across channels, break-before-make timing (4–20ns), low charge injection (0.5–5pC), high off-isolation (–74dB @ 50Ω), and QSOP-16 packaging suitable for space-constrained industrial sensor interfaces.

Technical Context

The MAX4581EEE+ implements a single 8:1 analog multiplexer architecture with three address inputs (A/B/C) and an active-low ENABLE control. Its CMOS switch core uses matched P/N transistor pairs driven by level-shifted logic to maintain rail-to-rail analog conduction while preserving low distortion (<0.02% THD @ 600Ω) and minimal crosstalk (–96dB for comparable MAX4582).

It features internal ESD diodes between each analog pin and VCC/VEE, requiring strict power sequencing (VCC first, then VEE, then signals) to avoid latch-up. The device is pin-compatible with industry-standard CD4051 and MAX4051, but retains RCA-style pin nomenclature (X0–X7, X, A/B/C, ENABLE, VCC, VEE, GND).

Key Specifications

Pinout & Package

MAX4581EEE+ is housed in a 16-pin QSOP (Quarter-size Outline Package) with 0.65mm pitch, 5.0mm × 4.0mm body, and exposed pad not present (TQFN variant has EP; QSOP does not). Pin 1 is marked via laser top-side dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4581ESE+, the MAX4581EEE+ offers finer pitch and better thermal performance in compact layouts; versus ADG708BRUZ, it trades higher RON for wider supply flexibility (±2V to ±6V or +2V to +12V), making it uniquely suited for mixed-rail industrial and automotive subsystems.

Availability

MAX4581EEE+ is available at Aetrix Electronics and suitable for battery-operated equipment, audio/video signal routing, and low-voltage data-acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for MAX4581EEE+ 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, medical, and communications markets.

The MAX4581EEE+ belongs to Maxim's low-voltage analog switch/multiplexer family, engineered for rail-to-rail signal integrity, ultra-low leakage, and robust operation in space- and power-constrained embedded systems.

FAQ

What supply configurations does the MAX4581EEE+ support?

The MAX4581EEE+ supports dual supplies from ±2V to ±6V (e.g., ±5V) or single supply from +2V to +12V (with VEE tied to GND). At ±5V, it achieves 80Ω typical on-resistance and 1nA off-leakage at +25°C. Operation below +2V is possible but degrades RON and switching speed - full specifications apply only within the rated ranges.

Is the MAX4581EEE+ pin-compatible with the CD4051?

Yes, the MAX4581EEE+ is pin-compatible with the CD4051B and MAX4051, sharing identical pinout (X0–X7, X, A/B/C, ENABLE, VCC, VEE, GND) and logic function. However, its BICMOS process delivers significantly lower on-resistance (80Ω vs. ~120Ω for CD4051), lower leakage, and guaranteed performance over –40°C to +85°C - making it a direct upgrade in existing CD4051 designs.

How does the ENABLE pin function on the MAX4581EEE+?

The ENABLE pin on the MAX4581EEE+ is active-low: when logic high, all internal switches open (high-impedance state), regardless of address inputs; when logic low, the A/B/C address lines determine which of X0–X7 connects to the common X terminal. It has no internal pull-down, so external termination is required for deterministic behavior during power-up or MCU reset.

What is the maximum analog signal voltage range for the MAX4581EEE+?

The MAX4581EEE+ 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. Exceeding VCC or falling below VEE forward-biases internal ESD diodes - clamping is possible but risks excessive current if not current-limited externally.

Does the MAX4581EEE+ require power-supply sequencing?

Yes - proper sequencing is critical: apply VCC first, then VEE, then logic inputs and analog signals. Violating this order may cause latch-up or excessive leakage. If sequencing isn't feasible, external blocking diodes (D1/D2) can be added in series with VCC/VEE, reducing analog range by ~0.7V but preserving RON and leakage specs - refer to Figure 1 in the MAX4581 datasheet.