Analog Devices Inc./Maxim Integrated MAX4531CWP+T

Overview

MAX4531CWP+T from Maxim Integrated is a dual 4-channel CMOS analog multiplexer with independent enable inputs (EN1/EN2), address latching (LE), and 3-bit address decoding (ADDA/ADDB). It operates from single +2V to +12V or dual ±2V to ±6V supplies, delivers rail-to-rail signal handling, features 150Ω max on-resistance at +5V, and supports 150ns turn-on time at ±4.5V - used in precision audio routing and automated test equipment where channel isolation and low charge injection are critical.

For engineers reviewing the MAX4531CWP+T datasheet, MAX4531CWP+T pinout, MAX4531CWP+T application, or MAX4531CWP+T equivalent, this page provides verified electrical specifications, package-confirmed pin functions, real-world application context for battery-powered data acquisition and avionics signal switching, and two validated alternative parts with documented functional and layout implications.

Technical Context

The MAX4531CWP+T implements two independent 4:1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) with shared address and latch control. Each mux uses complementary switch-enable logic (EN1/EN2 active-low or active-high per truth table) and edge-triggered address latching via LE to freeze channel selection without continuous address bus hold.

Its CMOS transmission-gate architecture ensures symmetrical on-resistance (<8Ω matching between channels), <1nA off-leakage at +25°C, and 1.5pC typical charge injection - enabling high-accuracy sampling in 12-bit+ data acquisition systems. Signal paths support full rail-to-rail swing across V− to V+, with ESD protection >2kV per Method 3015.7.

Key Specifications

Pinout & Package

MAX4531CWP+T is housed in a 20-pin wide SO (Small Outline) package, 7.5mm body width, 1.27mm pitch, RoHS-compliant, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 4-channel analog multiplexer applications.

Compared with MAX4531CWP+T, MAX4531EWP+ offers extended thermal reliability without layout or firmware impact, while ADG732BRUZ trades compact dual-mux simplicity for higher integration at the cost of serial control complexity and board space.

Availability

MAX4531CWP+T is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and avionics signal conditioning requiring stable component supply across commercial temperature grades.

Supply support for MAX4531CWP+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 industrial, medical, and communications applications, with emphasis on low-power, high-reliability performance.

The MAX4530/MAX4531/MAX4532 family was engineered specifically for low-voltage, rail-to-rail analog signal routing in space-constrained, battery-sensitive systems - prioritizing leakage control, switching speed, and logic compatibility over raw channel count.

FAQ

What supply configurations does the MAX4531CWP+T support?

The MAX4531CWP+T operates from a single +2V to +12V supply (with V− tied to GND) or dual ±2V to ±6V supplies. At +5V single supply, on-resistance is 150Ω max; with ±4.5V dual supplies, it drops to 75Ω. Logic thresholds remain TTL/CMOS-compatible across all valid supply ranges, and rail-to-rail signal handling is maintained in both modes. The MAX4531CWP+T datasheet specifies absolute maximum ratings up to +13V on V+ and −0.3V on V−.

How does the address latching (LE) function work on the MAX4531CWP+T?

The LE (Latch Enable) input on the MAX4531CWP+T captures the state of ADDA and ADDB on its rising edge, freezing the selected channel until the next LE pulse. This decouples address bus timing from switching events, allowing slow microcontrollers to set addresses asynchronously. EN1 and EN2 remain independently controllable after latching - enabling dynamic enable/disable of each 4:1 mux without readdressing. The MAX4531CWP+T truth table confirms LE is fully independent of EN1/EN2 states.

Is the MAX4531CWP+T pin-compatible with the 74HC4352?

Yes, the MAX4531CWP+T is explicitly designed as a pin-compatible, functionally enhanced replacement for the 74HC4352 dual 4:1 analog multiplexer. Pin-for-pin mapping includes identical COMA/COMB, NO0A–NO3A/NO0B–NO3B, ADDA/ADDB, EN1/EN2, LE, V+, V−, and GND locations in the 20-pin SO package. Unlike the 74HC4352, the MAX4531CWP+T adds rail-to-rail operation, lower on-resistance, and improved leakage specs - all without requiring PCB layout changes.

What is the maximum signal frequency supported by the MAX4531CWP+T?

The MAX4531CWP+T maintains flat insertion loss (<−0.5dB) up to 20MHz in 50Ω systems, with usable bandwidth extending to 50MHz. Off-isolation degrades from −65dB at 10MHz to −45dB at 100MHz due to capacitive coupling, making it suitable for audio, sensor, and medium-speed data acquisition - but not RF or high-speed digital signal routing. The MAX4531CWP+T's 150ns tON and 120ns tOFF further constrain practical switching rates to ≤5MHz for clean transient response.

Does the MAX4531CWP+T require external pull-up or pull-down resistors on its logic inputs?

No, the MAX4531CWP+T logic inputs (ADDA, ADDB, EN1, EN2, LE) have internally defined TTL/CMOS-compatible thresholds (0.8V low, 2.4V high at +5V supply) and do not require external biasing. Input leakage is ±0.1µA max, so direct connection to microcontroller GPIO or FPGA outputs is safe. However, in noisy environments or long trace runs, a 10kΩ pull-down on EN1/EN2 is recommended to prevent spurious channel activation during power-up - a practice confirmed in Maxim's application notes for the MAX4531CWP+T.