Analog Devices Inc./Maxim Integrated MAX379EPE

Overview

MAX379EPE from Maxim Integrated is a 4-channel differential (2-of-8) analog multiplexer with series N-channel/P-channel/N-channel fault protection architecture, ±60V continuous input tolerance with ±15V supplies, <2 mW power dissipation, and break-before-make switching - deployed in avionics test equipment for high-reliability signal routing under transient overvoltage conditions.

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 fault-protection behavior under power-off and overvoltage conditions, and real-world design implications for industrial data acquisition and safety-critical routing systems.

Technical Context

The MAX379EPE implements a triple-FET series switch structure (N-P-N) that actively blocks fault currents at nanoamp levels during ±60V overvoltage events with power applied, and fully disables all channels when V+ and V− are unpowered. Its digital interface accepts TTL/CMOS logic thresholds (0.8V/2.4V) without pull-ups and guarantees break-before-make timing (25–200 ns).

Unlike first-generation fault-protected muxes limited to ±35V, the MAX379EPE sustains ±60V continuous analog inputs with ±15V supplies and ±75V with supplies off - enabled by gate-driven FET isolation that forces infinite ON-resistance beyond ±13.5V/+12V thresholds. It operates across ±4.5V to ±18V supply rails and supports demultiplexer mode with full fault protection retained.

Key Specifications

Pinout & Package

MAX379EPE is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.300-inch width, compliant with JEDEC MS-001. Pin 1 is top-left corner (notch side), with GND at Pin 3, V+ at Pin 4, V− at Pin 5, EN at Pin 6, A0 at Pin 7, A1 at Pin 8, OUTA at Pin 11, OUTB at Pin 12, IN1A–IN4A on Pins 13–16 and 1–2, and IN1B–IN4B on Pins 9–10 and 14–16 per datasheet Figure.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG509F and MAX4617, the MAX379EPE uniquely combines differential architecture, ±75V power-off fault tolerance, and automatic channel disable - making it the sole option for safety-critical avionics and industrial systems where input voltage may persist during power loss.

Availability

MAX379EPE is available at Aetrix Electronics and suitable for avionics test equipment, industrial data acquisition systems, and process control instrumentation 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX379EPE belongs to Maxim's fault-protected analog multiplexer product line, engineered specifically for signal routing in harsh environments where overvoltage, power interruption, and sensor protection are primary design constraints.

FAQ

What is the maximum continuous input voltage the MAX379EPE supports with its ±15V supplies?

The MAX379EPE supports ±60V continuous analog input voltage when operated with ±15V supplies - a key differentiator from first-generation fault-protected muxes limited to ±35V. This rating is guaranteed across the full −40°C to +85°C operating range and reflects sustained DC stress, not transient peaks. The device achieves this via its series N-P-N FET structure, which forces channel cutoff beyond ±13.5V/+12V thresholds while limiting leakage to <100nA.

Does the MAX379EPE remain protected when its power supplies are turned off?

Yes - the MAX379EPE maintains full fault protection with zero supply voltage applied, tolerating ±75V continuous input while drawing only ≤100nA leakage current. All internal switches turn OFF automatically when V+ and V− are unpowered, preserving isolation between inputs and preventing backfeeding. This behavior is intrinsic to its series FET architecture and requires no external control or biasing.

Can the MAX379EPE be used as a demultiplexer?

Yes - the MAX379EPE functions bidirectionally and supports demultiplexer operation with full fault protection retained. When the OUTA/OUTB pins are driven and INx pins used as outputs, the device still enforces break-before-make timing and limits fault current to nanoamp levels under overvoltage. This capability is explicitly documented in the "Operation as a Demultiplexer" section of the datasheet and validated across temperature.

What is the guaranteed ON-resistance matching between channels of the MAX379EPE?

The MAX379EPE guarantees ≤3% R_DS(ON) matching between channels at ±10V analog input with ±15V supplies - measured as the ratio of highest to lowest channel resistance. At +10V input, typical match is 2%; at −10V, it degrades slightly to 3%. This matching directly impacts gain error in differential instrumentation amplifier stages and is specified in the Typical Operating Characteristics section.

Is the MAX379EPE pin-compatible with other members of the MAX378/MAX379 family?

No - the MAX379EPE is not pin-compatible with the MAX378 series due to differing channel count and pin assignments. While both use 16-pin DIP packages, MAX378 has 8 single-ended inputs and one output, whereas MAX379EPE has four differential input pairs (IN1A/B through IN4A/B) and two outputs (OUTA/OUTB). Pin mappings for address bits, enable, and power rails differ significantly between the two families.