Analog Devices Inc./Maxim Integrated MAX4581CPE+

Overview

MAX4581CPE+ 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-ideal for battery-powered data-acquisition front-ends.

For engineers reviewing the MAX4581CPE+ datasheet, MAX4581CPE+ pinout, MAX4581CPE+ application, or MAX4581CPE+ equivalent, key selection criteria include guaranteed on-resistance matching across channels, low distortion (<0.02% @ 600Ω), high off-isolation (–74dB @ 50Ω), and PDIP-16 packaging suitable for prototyping and industrial signal routing where thermal margin and through-hole reliability are prioritized.

Technical Context

The MAX4581CPE+ implements a single 8:1 analog multiplexer architecture using BICMOS process technology. Its internal switch array is controlled by three digital address inputs (A, B, C) and an active-low ENABLE pin, supporting break-before-make switching with <20ns t_BBM at +25°C. All analog paths are bidirectional and fully rail-to-rail capable.

Dual-supply operation sets V_CC and V_EE as analog voltage rails, while GND serves only digital logic reference. ESD protection diodes clamp analog pins to V_CC and V_EE, making proper supply sequencing critical-V_CC must be applied before V_EE and signals to avoid forward conduction and leakage increase.

Key Specifications

Pinout & Package

MAX4581CPE+ uses a 16-pin plastic DIP (PDIP) package with through-hole mounting, rated for 0°C to +70°C operation. Pin 1 is X0 (analog input 0); pin 16 is V_CC; pin 8 is GND; pin 7 is V_EE; pin 13–15 and 12,1,5,2,4 are X0–X7; pin 3 is X (common output); pins 11,10,9 are A,B,C (address); pin 6 is ENABLE.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG708BRUZ and CD4051BM96, the MAX4581CPE+ uniquely balances dual-supply flexibility, sub-nA leakage, and guaranteed R_ON matching-making it optimal for precision, low-power, and mixed-rail instrumentation where signal integrity and thermal stability are non-negotiable.

Availability

MAX4581CPE+ is available at Aetrix Electronics and suitable for medical instrumentation, industrial data acquisition, audio signal routing, and battery-powered test equipment requiring stable component supply across extended production lifecycles.

Supply support for MAX4581CPE+ 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 communications applications.

The MAX4581CPE+ belongs to Maxim's low-voltage analog switch/multiplexer product line, engineered specifically for high-fidelity, low-leakage signal routing in resource-constrained and thermally variable environments.

FAQ

What supply configurations does the MAX4581CPE+ support?

The MAX4581CPE+ supports both dual-supply (±2V to ±6V) and single-supply (+2V to +12V) operation. When using single supply, V_EE must be tied to GND. The device maintains rail-to-rail analog signal handling across all supported ranges, and logic inputs remain TTL/CMOS-compatible at +5V or ±5V supplies. This flexibility allows the MAX4581CPE+ to interface directly with diverse host systems without external level-shifting circuitry.

How does the MAX4581CPE+ ensure signal integrity in precision applications?

The MAX4581CPE+ ensures signal integrity through guaranteed 80Ω on-resistance at ±5V with ≤10Ω channel-to-channel matching, <0.02% THD at 600Ω, and –74dB off-isolation at 50Ω/1MHz. Its 1nA off-leakage at +25°C minimizes DC error in high-impedance sensor interfaces, while low charge injection (≤5pC) prevents transient glitches during switching. These parameters are production-tested and specified across temperature, making the MAX4581CPE+ suitable for medical and industrial measurement systems where accuracy is critical.

What is the function of the ENABLE pin on the MAX4581CPE+?

The ENABLE pin on the MAX4581CPE+ is an active-low control that globally disables all internal switches when driven high. When ENABLE is low, the device responds to address inputs A, B, and C to select one of eight analog channels. This pin enables system-level power gating-allowing the MAX4581CPE+ to enter zero-current state during idle periods-and supports time-division multiplexing schemes where multiple devices share a common bus. No external pull-up is required; the pin accepts standard TTL/CMOS logic levels.

Can the MAX4581CPE+ be used in automotive applications?

The MAX4581CPE+ is rated for 0°C to +70°C operation and is not qualified to AEC-Q100 standards. For automotive applications requiring –40°C to +125°C operation and qualification, Maxim offers the MAX4581ASE+ (SO-16) and MAX4581AUE+ (TSSOP-16) variants. The MAX4581CPE+ may be used in non-safety-critical, cabin-located consumer electronics within vehicles-but not in engine bay, ADAS, or safety-related subsystems where extended temperature and qualification compliance are mandatory.

What package type and pin count does the MAX4581CPE+ use?

The MAX4581CPE+ uses a 16-pin plastic dual in-line package (PDIP) with through-hole mounting. This package provides mechanical robustness, ease of prototyping on breadboards and PCBs, and adequate thermal dissipation for continuous operation at +70°C ambient. Pinout follows industry-standard 74HC4051 compatibility, enabling drop-in replacement in legacy designs. The "+" suffix denotes RoHS-compliant, lead-free construction per Maxim's packaging standards.