Analog Devices Inc./Maxim Integrated MAX381EPE

Overview

The MAX381EPE from Maxim Integrated is a precision single-pole single-throw (SPST) analog switch with normally open configuration, designed for low-voltage signal routing in high-accuracy systems. It delivers 20Ω typical on-resistance (≤35Ω max), <2Ω channel-to-channel on-resistance matching, and <5pC charge injection - enabling stable performance in sample-and-hold circuits and audio signal paths operating from ±3V to ±8V or +3V to +15V supplies.

For engineers reviewing the MAX381EPE datasheet, MAX381EPE pinout, MAX381EPE application, or MAX381EPE equivalent, key selection considerations include rail-to-rail analog signal handling (V− to V+), sub-100ns turn-off time, guaranteed leakage <2.5nA at +85°C, and compatibility with TTL/CMOS logic across 3V/5V/±3V/±5V supply domains.

Technical Context

The MAX381EPE implements a monolithic CMOS analog switch architecture fabricated using Maxim's low-voltage silicon-gate process. Its internal topology supports dual-supply operation with independent V+ and V− rails, while maintaining logic-level compatibility via CMOS inputs that minimize loading on control circuitry.

It features break-before-make switching only in the MAX383 variant - the MAX381EPE is SPST NO with no break-before-make timing. All electrical specifications - including on-resistance flatness (<4Ω over full analog range), off-isolation (72dB), and crosstalk (90dB) - are validated across −40°C to +85°C per its E-grade qualification.

Key Specifications

Pinout & Package

MAX381EPE is housed in a 16-pin plastic DIP (PDIP) package, 0.300" wide, with lead finish SnPb (non-RoHS). Pin 13 is GND; pins 11 and 14 are V+ and V− respectively; pins 1/3/6/8 are COM terminals; pins 9/16 are NO terminals; pins 10/15 are logic inputs (IN1/IN2); pins 2/7/12 are not internally connected (N.C.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX381CPE, the MAX381EPE extends operational reliability to −40°C and adds tighter leakage guarantees at elevated temperatures; versus ADG401BRZ, it trades ESD margin for superior analog performance - making it optimal for high-accuracy, temperature-variable signal routing.

Availability

MAX381EPE is available at Aetrix Electronics and suitable for military radios, test equipment, and battery-operated systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX381EPE 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 industrial, communications, and automotive markets.

The MAX381EPE belongs to Maxim's precision analog switch family, engineered for low-voltage, low-distortion signal routing in demanding applications such as military comms, test instrumentation, and avionics displays.

FAQ

What is the maximum analog signal voltage range supported by the MAX381EPE?

The MAX381EPE supports rail-to-rail analog signals from V− to V+, meaning it can switch voltages spanning the full difference between its negative and positive supply rails. With ±5V supplies, this yields a −5V to +5V range; with +12V/0V, it handles 0V to +12V. Absolute maximum ratings limit V+ to +17V and V− to −17V, but the usable analog range remains bounded by the applied supplies. This capability is confirmed in the Electrical Characteristics tables for both dual- and single-supply configurations.

Does the MAX381EPE require external protection diodes for overvoltage conditions?

The MAX381EPE does not require external protection diodes under normal operation, but Maxim recommends adding two series signal diodes (e.g., 1N4148) on V+ and V− if power-supply sequencing cannot be controlled - especially when V+ and V− are powered independently. These diodes prevent damage from transient overvoltages exceeding absolute maximum ratings, though they reduce the effective analog signal range by ~1.4V. The MAX381EPE itself contains internal protection diodes, as noted in the Pin Description section.

Is the MAX381EPE pin-compatible with the DG401 analog switch?

Yes, the MAX381EPE is explicitly specified as pin-compatible with the DG401 in its Features list. Both devices use identical 16-pin DIP pinouts, share the same COM/NO/IN/V+/V−/GND assignments, and operate with compatible logic thresholds and supply ranges. This allows direct replacement in legacy designs without PCB modification - a key advantage highlighted in Maxim's ordering documentation and application notes.

What is the guaranteed on-resistance matching between channels in the MAX381EPE?

The MAX381EPE guarantees on-resistance matching of less than 2Ω between its two switch channels (COM1/NO1 and COM2/NO2), as stated in the Features and Electrical Characteristics sections. This specification holds across the full operating temperature range (−40°C to +85°C) and analog signal range (V− to V+), ensuring consistent gain and phase response in differential or parallel signal paths - critical for instrumentation and audio applications.

Can the MAX381EPE operate from a single +3.3V supply?

Yes, the MAX381EPE supports single-supply operation down to +3V, including +3.3V nominal systems. At +3.3V, its on-resistance rises to 75Ω typical (185Ω max), and turn-on/turn-off times increase to 400ns/150ns respectively - values documented in the "Single +3.3V Supply" Electrical Characteristics table. Logic inputs remain compatible with 3.3V CMOS levels, and analog signal range spans 0V to +3.3V, making it viable for low-power portable designs.