Analog Devices Inc./Maxim Integrated MAX308EPE+

Overview

MAX308EPE+ from Maxim Integrated is a precision single-ended 1-of-8 CMOS analog multiplexer with ≤100Ω on-resistance, <5Ω channel-to-channel matching, and <10pC charge injection. It operates from +5V to +30V single supply or ±5V to ±20V dual supplies, supports rail-to-rail signal handling up to ±10V, and targets high-accuracy sample-and-hold and automatic test equipment where low leakage (<5nA NO-off at +85°C) and fast switching (<250ns transition time) are critical.

For engineers reviewing the MAX308EPE+ datasheet, MAX308EPE+ pinout, MAX308EPE+ application, or MAX308EPE+ equivalent, this page delivers verified electrical parameters, package-specific pin mapping for the 16-pin plastic DIP, real-world application context for military radios and battery-operated systems, and two validated alternative parts with documented functional and thermal differences.

Technical Context

The MAX308EPE+ implements a monolithic CMOS switch architecture with silicon-gate process optimization for low distortion and minimal signal path degradation. Its decode logic accepts three address bits (A0–A2) and an active-low enable (EN) to select one of eight bidirectional analog channels (NO1–NO8) to the common port (COM), with guaranteed break-before-make timing (115–450ns).

It features integrated electrostatic discharge protection (>2000V HBM), TTL/CMOS-compatible digital inputs, and matched on-resistance flatness (≤7Ω max variation across ±10V signal range). Leakage performance is fully specified over –40°C to +85°C, with COM-off leakage <20nA and NO-off leakage <5nA at maximum temperature.

Key Specifications

Pinout & Package

The MAX308EPE+ is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is A0 (LSB address), pin 16 is A2 (MSB address); V+ (pin 13), V- (pin 3), and GND (pin 14) provide independent analog and digital supply connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX308CPE+, the MAX308EPE+ extends operational reliability to harsher environments; versus ADG408BRZ, it delivers tighter matching and lower leakage critical for uncalibrated high-accuracy signal chains-making it the preferred choice for military, aerospace, and industrial test systems.

Availability

MAX308EPE+ is available at Aetrix Electronics and suitable for automatic test equipment, military radio subsystems, and battery-operated medical diagnostics 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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX308/MAX309 product line was engineered specifically for high-fidelity analog signal routing in test and measurement systems, emphasizing low distortion, thermal stability, and drop-in compatibility with legacy industry-standard multiplexers.

FAQ

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

The MAX308EPE+ supports an analog signal range of ±10V when operated with ±15V supplies, and scales linearly with supply voltage-for example, ±5V supplies yield ±5V signal range. This rail-to-rail capability allows direct interfacing with standard industrial sensors and DACs without level-shifting circuitry, and is explicitly guaranteed across the full –40°C to +85°C operating temperature range of the MAX308EPE+.

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

No, the MAX308EPE+ features CMOS-compatible digital inputs with defined logic thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and input leakage <±1.0µA, eliminating the need for external pull-up or pull-down resistors. Its inputs draw negligible current, allowing direct connection to microcontroller GPIOs or FPGA outputs-this behavior is confirmed in the Electrical Characteristics table for IA_H and IA_L parameters of the MAX308EPE+.

Can the MAX308EPE+ be used with unbalanced supply voltages like +24V and –5V?

Yes, the MAX308EPE+ supports unbalanced supplies-the absolute maximum rating specifies V+ – V– ≤ +44V, and the device functions correctly with configurations such as +24V/V– = –5V. However, the usable analog signal range becomes limited to V– +1V to V+ –1V due to internal clamp diodes, and on-resistance increases slightly compared to symmetric supplies. This capability is documented in the Applications Information section of the MAX308EPE+ datasheet.

How does the MAX308EPE+ achieve its <5Ω on-resistance matching specification?

The MAX308EPE+ achieves <5Ω on-resistance matching through Maxim's improved 44V silicon-gate CMOS process and matched transistor layout techniques that minimize process-induced variations across the eight switch channels. This matching is guaranteed over the full specified analog signal range (±10V) and temperature range (–40°C to +85°C), and is verified by production testing-not just design simulation-as stated in the Electrical Characteristics table for ∆R_ON of the MAX308EPE+.

Is the MAX308EPE+ pin-compatible with the DG408 multiplexer?

Yes, the MAX308EPE+ is a plug-in upgrade for the DG408, with identical pinout, logic interface, and functional behavior-including address decoding, enable polarity, and channel assignment. It improves upon the DG408 with lower on-resistance (<100Ω vs. ~120Ω), tighter matching (<5Ω vs. ~10Ω), and enhanced ESD protection (>2000V vs. ~200V), while maintaining backward compatibility-confirmed in the Features section and Ordering Information of the MAX308EPE+ datasheet.