Analog Devices Inc./Maxim Integrated MAX308CUE+T

Overview

MAX308CUE+T from Maxim Integrated is a precision single-ended 1-of-8 CMOS analog multiplexer with on-resistance <100Ω, on-resistance matching <5Ω between channels, and guaranteed flatness of ≤7Ω over ±10V signal range. It operates from +5V to +30V single supply or ±5V to ±20V dual supplies, features rail-to-rail signal handling, and is used in sample-and-hold circuits and automatic test equipment.

For engineers reviewing the MAX308CUE+T datasheet, MAX308CUE+T pinout, MAX308CUE+T application, or MAX308CUE+T equivalent, key selection criteria include on-resistance flatness, charge injection (<10pC), NO-off leakage (<5nA at +85°C), and TSSOP-16 package compatibility for high-density PCB layouts.

Technical Context

The MAX308CUE+T implements a CMOS decode logic architecture with three address inputs (A0–A2) and an active-high enable (EN) controlling eight bidirectional analog switches between NO1–NO8 and COM. Switching is governed by TTL/CMOS-compatible digital inputs with low input loading (≤1µA).

It uses Maxim's 44V silicon-gate process to achieve low charge injection (<10pC), ESD protection >2000V, and stable on-resistance across temperature (−40°C to +85°C for E-grade; this part is C-grade: 0°C to +70°C). Signal routing supports rail-to-rail operation up to ±20V dual or +30V single supply.

Key Specifications

Pinout & Package

MAX308CUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), optimized for compact, high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX308CUE+T, MAX308EUE+ offers identical performance with extended temperature capability, while ADG408BRUZ trades lower on-resistance for higher charge injection and lacks guaranteed flatness-making it less suitable for precision metrology or high-fidelity sample-and-hold.

Availability

MAX308CUE+T is available at Aetrix Electronics and suitable for sample-and-hold circuits, automatic test equipment, and heads-up displays requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX308CUE+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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX308/MAX309 product line delivers precision analog switching solutions targeting instrumentation, test equipment, and military-grade signal routing where low distortion, predictable on-resistance, and low leakage are critical.

FAQ

What is the maximum analog signal range supported by the MAX308CUE+T?

The MAX308CUE+T supports rail-to-rail analog signals from V− to V+. With ±15V dual supplies, this yields a ±15V range; with +12V/0V single supply, it supports 0V to +12V. The device guarantees flat on-resistance up to ±10V, and absolute maximum analog voltage is limited to (V− − 2V) to (V+ + 2V) per internal clamping diodes.

Is the MAX308CUE+T pin-compatible with the DG408 analog multiplexer?

Yes, the MAX308CUE+T is explicitly designed as a plug-in upgrade for the industry-standard DG408, DG409, DG508A, and DG509A. Its pinout, logic interface, and electrical behavior match these legacy devices, allowing direct replacement without PCB modification.

What is the typical charge injection value for the MAX308CUE+T, and why does it matter?

The MAX308CUE+T guarantees charge injection of less than 10pC. This parameter directly impacts accuracy in sample-and-hold and switched-capacitor circuits: lower charge injection reduces voltage step errors when a channel turns off, improving settling time and DC precision in data acquisition systems.

Does the MAX308CUE+T require decoupling capacitors, and if so, where should they be placed?

Yes, the MAX308CUE+T requires local decoupling. Place a 0.1µF ceramic capacitor between V+ and GND, and another between V− and GND, as close as possible to pins 13 and 15. This suppresses supply noise and prevents transient coupling into analog paths, especially critical during fast switching transitions.

Can the MAX308CUE+T operate with unbalanced supplies, such as +24V and −5V?

Yes, the MAX308CUE+T supports unbalanced supplies. The datasheet confirms operation with configurations like +24V/−5V, provided the difference between V+ and V− does not exceed +44V and each supply remains within its absolute maximum rating (V+ ≤ 44V referenced to V−, GND ≤ 25V referenced to V−).