Analog Devices Inc./Maxim Integrated MAX308EUE+T

Overview

MAX308EUE+T from Maxim Integrated is a precision single-ended 1-of-8 CMOS analog multiplexer designed for high-fidelity signal routing in precision instrumentation and test systems. It delivers <100Ω on-resistance (max), <5Ω channel-to-channel matching, <7Ω on-resistance flatness over ±10V signal range, <10pC charge injection, and <5nA NO-off leakage at +85°C - enabling low-distortion sampling in battery-operated and military-grade analog front-ends.

For engineers reviewing the MAX308EUE+T datasheet, MAX308EUE+T pinout, MAX308EUE+T application, or MAX308EUE+T equivalent, key selection criteria include rail-to-rail analog signal handling (±20V bipolar / +30V single supply), TTL/CMOS logic compatibility, ESD protection >2000V, and plug-in upgrade capability for DG408/DG508A without layout changes.

Technical Context

The MAX308EUE+T implements a monolithic CMOS switch matrix with precision decode logic controlling eight bidirectional analog channels (NO1–NO8) to a common COM terminal. Its silicon-gate architecture ensures matched on-resistance across channels and minimal variation with temperature and signal voltage - critical for multichannel data acquisition where gain/offset errors must be minimized.

It supports both single-supply (+5V to +30V, V− tied to GND) and dual-supply (±5V to ±20V) operation while maintaining fast switching (tTRANS < 250ns), low power consumption (<300µW), and guaranteed break-before-make timing (tOPEN = 115ns min) - making it suitable for sample-and-hold circuits and automatic test equipment requiring deterministic channel isolation.

Key Specifications

Pinout & Package

MAX308EUE+T is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance up to +85°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX308CUE, the MAX308EUE+T provides extended temperature operation and identical electrical performance; compared with ADG408BRUZ, it delivers tighter on-resistance matching, lower charge injection, and guaranteed flatness - making it superior for precision instrumentation where channel consistency and hold-step fidelity are critical.

Availability

MAX308EUE+T is available at Aetrix Electronics and suitable for automatic test equipment, military radio subsystems, and battery-operated portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX308EUE+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 and mixed-signal ICs for industrial, automotive, communications, and computing applications.

The MAX308EUE+T belongs to Maxim's precision analog multiplexer product line, engineered specifically for low-leakage, low-distortion signal routing in demanding test, measurement, and military systems where channel matching and temperature stability are essential.

FAQ

What is the maximum analog signal range supported by the MAX308EUE+T?

The MAX308EUE+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 over ±10V, and absolute maximum ratings allow up to ±20V bipolar or +30V single supply - provided V+ − V− ≤ 44V.

Does the MAX308EUE+T require external pull-up resistors on its address or enable pins?

No, the MAX308EUE+T features CMOS-compatible digital inputs with TTL/CMOS logic thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and input leakage <±1.0µA. It does not require external pull-up or pull-down resistors - direct connection to microcontroller GPIO or FPGA outputs is fully supported without additional components.

Can the MAX308EUE+T operate with unbalanced supplies such as +24V and −5V?

Yes, the MAX308EUE+T supports unbalanced supplies. Its absolute maximum rating requires V+ − V− ≤ 44V, and operation is specified from ±5V to ±20V dual or +5V to +30V single. A +24V/−5V configuration (29V differential) falls within specification and maintains full performance - including on-resistance, leakage, and switching speed - as confirmed in the datasheet's Applications Information section.

How does the enable (EN) pin affect leakage and power consumption in the MAX308EUE+T?

When EN is low, all internal switches are disabled, reducing total supply current to <1µA and suppressing NO-off and COM-off leakage paths. This state cuts dynamic power to near zero and isolates channels electrically - critical for low-power sleep modes in battery-operated systems. The MAX308EUE+T datasheet specifies I+ and I− currents <0.5mA active, dropping to sub-microamp levels when disabled.

Is the MAX308EUE+T pin-compatible with the industry-standard DG408 multiplexer?

Yes, the MAX308EUE+T is a pin-compatible, functionally identical plug-in upgrade for the DG408. Both share identical 16-pin TSSOP (and DIP/SO) footprints, address/enable logic, and channel mapping. The MAX308EUE+T improves upon DG408 with lower on-resistance matching (<5Ω vs. ~15Ω), lower charge injection (<10pC vs. ~25pC), and enhanced ESD protection (>2000V vs. ~200V), with no PCB changes required.