Analog Devices Inc./Maxim Integrated MAX379EPE+

Overview

MAX379EPE+ from Maxim Integrated is a 4-channel differential (2-of-8) fault-protected analog multiplexer with series N-channel/P-channel/N-channel switch architecture, ±60V continuous input tolerance with ±15V supplies, <2mW power dissipation, and break-before-make switching - deployed in industrial data acquisition front ends where sensor overvoltage and power-loss fault conditions must be contained.

For engineers reviewing the MAX379EPE+ datasheet, MAX379EPE+ pinout, MAX379EPE+ application, or MAX379EPE+ equivalent, this page delivers verified specifications, validated package mapping to 16-pin plastic DIP, confirmed differential channel operation, real-world leakage behavior under fault conditions, and two rigorously cross-checked alternative parts for high-voltage analog signal routing.

Technical Context

The MAX379EPE+ implements a triple-FET series protection structure that actively blocks ±60V faults with power applied and withstands ±75V with supplies off - limiting input leakage to <100nA across all fault states. Its digital interface accepts TTL/CMOS logic levels (0.8V/2.4V thresholds) without pull-ups and guarantees break-before-make timing (25–200ns).

As a differential 2-of-8 mux, it routes two independent analog signals simultaneously (e.g., IN1A/IN1B → OUTA/OUTB), supports ±4.5V to ±18V dual supplies, and maintains <2kΩ typical ON resistance at ±15V - enabling precision signal conditioning in avionics test equipment and process control systems where channel isolation and fault resilience are non-negotiable.

Key Specifications

Pinout & Package

MAX379EPE+ uses a 16-pin plastic DIP (dual in-line package) with 0.300-inch width, 0.100-inch lead pitch, and through-hole mounting. Pin 1 is top-left corner (A1), substrate may float or connect to V+ per JI CMOS design.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG509FBRZ and MAX4617CSE+, the MAX379EPE+ uniquely delivers integrated differential channel pairs, guaranteed break-before-make, and ±75V fault tolerance with supplies off - making it the only option for safety-critical, power-interruption-prone environments requiring true differential signal integrity.

Availability

MAX379EPE+ is available at Aetrix Electronics and suitable for industrial data acquisition, avionics test equipment, and process control systems requiring stable component supply across extended temperature ranges (-40°C to +85°C) and long-term obsolescence management.

Supply support for MAX379EPE+ 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 high-reliability ICs for industrial, automotive, and communications infrastructure markets - with emphasis on fault tolerance, low power, and signal integrity.

The MAX379EPE+ belongs to Maxim's fault-protected analog multiplexer product line, engineered specifically for high-voltage signal routing in harsh environments where sensor overvoltage, power loss, and EMI must not compromise measurement accuracy or system safety.

FAQ

What is the maximum continuous input voltage the MAX379EPE+ can withstand with its power supplies turned off?

The MAX379EPE+ withstands ±75V continuous input voltage with V+ and V- supplies disconnected, drawing less than 100nA leakage current. This capability protects upstream sensors and prevents backfeed into unpowered circuitry - a key differentiator versus first-generation fault-protected muxes limited to ±35V under the same condition. The MAX379EPE+ achieves this via its series N/P/N FET structure, which turns off all channels automatically when supplies are absent.

Does the MAX379EPE+ support true differential signal routing, and how is it implemented?

Yes, the MAX379EPE+ is a native 4-channel differential (2-of-8) multiplexer: each channel consists of matched A and B inputs (e.g., IN1A/IN1B) routed to corresponding outputs (OUTA/OUTB) simultaneously. This architecture preserves signal balance and common-mode rejection without external pairing. Unlike single-ended muxes, the MAX379EPE+ guarantees matched ON resistance and charge injection between A/B paths - critical for precision instrumentation amplifier interfaces.

What is the guaranteed break-before-make timing specification for the MAX379EPE+?

The MAX379EPE+ guarantees 25ns minimum to 200ns maximum break-before-make delay across -40°C to +85°C, as measured in Figure 2 of the datasheet. This timing prevents momentary shorting between differential inputs during channel transitions - essential for avoiding cross-talk or damage in multi-sensor systems. The delay is inherent to the triple-FET gate drive design and does not require external timing components.

Can the MAX379EPE+ operate from asymmetric power supplies, such as +15V and -5V?

Yes, the MAX379EPE+ supports asymmetric supplies (e.g., +15V/V+ and -5V/V-) and single supplies (+9V to +22V with V- tied to GND). Its analog performance - including ON resistance and output swing - depends on the total V+–V- differential, while digital thresholds remain referenced to GND. With +15V/-5V, the output swing is limited to approximately +13.5V to -2V, preserving compatibility with standard op-amps and ADC drivers.

How does the MAX379EPE+ handle overvoltage on an OFF channel when power supplies are active?

When an OFF channel experiences overvoltage (e.g., ±60V) with ±15V supplies active, the MAX379EPE+'s series FET structure forces either the N-channel or P-channel device into cutoff - limiting leakage to <100nA at +25°C. Transient leakage may reach 40–50µA initially but decays to nanoamp levels within seconds due to internal node discharge. This behavior is documented in Figures 9 and the "Detailed Description" section - ensuring no damage to downstream circuitry or cross-channel coupling.