Analog Devices Inc./Maxim Integrated MAX308CUE

Overview

MAX308CUE 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 <10pC charge injection, and targets high-accuracy signal routing in test equipment and military radios.

For engineers reviewing the MAX308CUE datasheet, MAX308CUE pinout, MAX308CUE application, or MAX308CUE equivalent, key selection criteria include rail-to-rail analog signal handling (±10V), low leakage (<5nA NO-off at +85°C), fast transition time (<250ns), and TSSOP-16 package compatibility for space-constrained PCB layouts.

Technical Context

The MAX308CUE implements CMOS decode logic with three address inputs (A0–A2) and an active-low enable (EN) to select one of eight bidirectional analog channels (NO1–NO8) to the common port (COM). Its silicon-gate process ensures matched channel characteristics and low temperature drift.

It supports both unipolar and bipolar operation: V+ and V− pins accept asymmetric supplies (e.g., +24V/−5V), with substrate tied to V+. All digital inputs are TTL/CMOS-compatible, and internal clamping diodes protect against signal overvoltage when used with external series resistors.

Key Specifications

Pinout & Package

MAX308CUE is housed in a 16-pin Thin Shrink Small Outline Package (TSSOP) with 0.65mm pitch, optimized for automated assembly and thermal performance in compact systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG408BRUZ and TMUX1308PWR, the MAX308CUE uniquely guarantees on-resistance flatness (≤7Ω) and low hot-temperature leakage (≤5nA) within its full ±10V signal range-making it irreplaceable in precision metrology and high-reliability defense applications where channel-to-channel consistency is non-negotiable.

Availability

MAX308CUE is available at Aetrix Electronics and suitable for automatic test equipment, military radios, and sample-and-hold circuits requiring stable component supply across extended production lifecycles.

Supply support for MAX308CUE 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX308CUE belongs to Maxim's precision analog multiplexer product line, engineered specifically for applications demanding low distortion, tight channel matching, and reliable operation in harsh electrical environments.

FAQ

What is the maximum analog signal voltage range supported by the MAX308CUE?

The MAX308CUE supports an analog signal range of ±10V when operated with ±15V supplies. With +12V/0V single supply, the usable range is 0V to +12V. The device maintains rail-to-rail signal handling capability, and its on-resistance remains flat (≤7Ω) across the full specified range-critical for maintaining accuracy in precision data acquisition systems using the MAX308CUE.

Does the MAX308CUE require external pull-up resistors on its address or enable pins?

No, the MAX308CUE does not require external pull-up resistors. Its CMOS digital inputs (A0, A1, A2, EN) have low input current (<±1µA) and are fully compatible with standard TTL/CMOS logic levels (VAL ≤ 0.8V, VAH ≥ 2.4V). Internal input structure eliminates need for external biasing-simplifying design and reducing BOM count in systems using the MAX308CUE.

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

Yes, the MAX308CUE supports unbalanced supplies. Its absolute maximum rating allows V+ − V− ≤ +44V, and operation is verified across configurations like +24V/−5V. This flexibility enables integration into legacy industrial systems where asymmetric rails exist-ensuring the MAX308CUE functions correctly without modification while preserving its low on-resistance and leakage specs.

How does the MAX308CUE's charge injection performance affect sample-and-hold circuit accuracy?

The MAX308CUE's guaranteed charge injection of <10pC directly limits voltage error on hold capacitors: for a 1000pF capacitor, error is <10mV-well below 1 LSB of a 12-bit system (≈2.4mV at 10V full scale). This makes the MAX308CUE suitable for high-fidelity data acquisition where signal integrity across all eight channels must be preserved, especially in systems relying on the MAX308CUE for multi-channel S/H front-ends.

Is the MAX308CUE pin-compatible with the industry-standard DG408 multiplexer?

Yes, the MAX308CUE is a plug-in upgrade for the DG408, sharing identical pinout, function, and footprint in TSSOP-16. It improves upon the DG408 with tighter on-resistance matching (<5Ω vs. typical 15Ω), lower leakage (<5nA vs. 25nA at +85°C), and enhanced ESD protection (>2000V vs. ~200V). No PCB changes are required when replacing DG408 with MAX308CUE-delivering immediate performance uplift in existing designs.