Analog Devices Inc./Maxim Integrated MAX308EPE

Overview

MAX308EPE 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 supports rail-to-rail analog signal handling in military-grade temperature range (–40°C to +85°C) for use in automatic test equipment and guidance systems.

For engineers reviewing the MAX308EPE datasheet, MAX308EPE pinout, MAX308EPE application, or MAX308EPE equivalent, this page delivers verified electrical parameters, package-specific terminal mapping, real-world timing behavior, leakage performance at temperature extremes, and validated drop-in alternatives for legacy DG408/DG508A-based designs.

Technical Context

The MAX308EPE implements a CMOS decode logic architecture with three address inputs (A0–A2), an active-low enable (EN), and eight bidirectional analog inputs (NO1–NO8) routed to a common bidirectional COM terminal. Its silicon-gate process ensures low charge injection (<10pC) and ESD protection >2000V, enabling reliable switching in sample-and-hold and battery-operated systems.

It supports both unbalanced and balanced supply configurations - e.g., +24V/–5V - with analog signal range scaling linearly with supply voltage. Switching dynamics include transition time <250ns (TA = TMIN to TMAX), enable turn-on time <600ns, and break-before-make interval <450ns under single-supply conditions, all measured with 1kΩ load and 1nF capacitance.

Key Specifications

Pinout & Package

MAX308EPE is supplied in a 16-pin plastic DIP package (0.300" wide), with through-hole mounting and industry-standard footprint compatible with MIL-STD-1835B outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX308EPE, MAX308CPE trades extended temperature capability for lower cost in benign environments, while ADG408BNZ offers lower on-resistance but omits key precision specs like channel matching and flatness - making MAX308EPE uniquely suited for metrology-grade analog switching.

Availability

MAX308EPE is available at Aetrix Electronics and suitable for automatic test equipment, military radio systems, and heads-up display electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX308EPE 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 demanding industrial, automotive, and communications applications.

The MAX308/MAX309 family was engineered specifically for precision analog signal routing in test, measurement, and defense systems - emphasizing low distortion, guaranteed matching, and robust operation across extreme temperatures.

FAQ

What is the maximum analog signal range supported by the MAX308EPE?

The MAX308EPE supports analog signals from V− to V+ across its full specified supply range. With ±15V dual supplies, the signal range is ±10V; with +12V single supply (V− = GND), it is 0V to +10V. The device guarantees on-resistance flatness ≤7Ω only within these defined ranges - exceeding them degrades linearity and increases distortion. Always refer to the "Analog Signal Range" parameter in the Electrical Characteristics tables for your specific supply configuration.

Does the MAX308EPE require external pull-up resistors on its address or enable pins?

No, the MAX308EPE does not require external pull-up resistors on A0, A1, A2, or EN. Its CMOS inputs have leakage current <±1.0µA across temperature, and logic thresholds are TTL/CMOS-compatible (VAL ≤ 0.8V, VAH ≥ 2.4V). Direct connection to microcontroller GPIO or FPGA outputs is fully supported. Pull-ups are unnecessary unless system-level noise immunity or default-safe state (e.g., disabled at power-up) is required - in which case a 10kΩ resistor to V+ is sufficient.

Can the MAX308EPE operate with unbalanced supplies such as +24V and –5V?

Yes, the MAX308EPE supports unbalanced supplies including +24V and –5V, provided the difference between V+ and V− does not exceed +44V (per Absolute Maximum Ratings) and both rails remain within their individual voltage limits (V+ ≤ 44V referenced to V−, GND ≤ 25V referenced to V−). In this configuration, the analog signal range becomes –5V to +24V, and on-resistance increases slightly versus symmetric ±15V operation - consult the Typical Operating Characteristics curves for RON vs. VCOM at your specific supply points.

How does the MAX308EPE compare to the industry-standard DG408 in terms of pin compatibility?

The MAX308EPE is a pin-compatible, functionally identical drop-in replacement for the DG408. Pin assignments (1–16), truth table, supply requirements, and switching behavior match exactly - including EN polarity, address decoding, and COM/NO terminal roles. No PCB layout changes are needed. Key improvements include lower on-resistance (<100Ω vs. ~120Ω), tighter matching (<5Ω vs. ~10Ω), and enhanced ESD protection (>2000V vs. ~200V), making MAX308EPE a direct upgrade without redesign.

What is the recommended power-supply sequencing for the MAX308EPE?

Per Maxim's datasheet, the recommended sequencing is: apply V+ first, then V−, then logic inputs (A0/A1/A2/EN), and finally analog signals (NOx/COM). Violating this sequence risks latch-up or excessive leakage due to internal diode conduction. If strict sequencing cannot be guaranteed in the system, add two small-signal diodes (e.g., 1N4148) in series with V+ and V− pins - this limits analog range to 1V below V+ and 1V above V− but preserves all other electrical performance of the MAX308EPE.