Analog Devices Inc./Maxim Integrated MAX382EWN

Overview

MAX382EWN from Maxim Integrated is an 8-channel, single-ended analog multiplexer with latchable digital inputs, designed for low-voltage signal routing in precision data-acquisition and battery-powered systems. It operates from a +2.7V to +16.5V single supply or ±3V to ±8V dual supplies, delivers ≤100Ω on-resistance (max), guarantees ≤4Ω channel-to-channel on-resistance matching, and supports TTL/CMOS logic compatibility - enabling robust analog switching in portable medical instruments and automated test equipment.

For engineers reviewing the MAX382EWN datasheet, MAX382EWN pinout, MAX382EWN application, or MAX382EWN equivalent, key selection criteria include its -40°C to +85°C industrial temperature rating, 18-pin wide SO package, latched address control (A0–A2, WR, RS), guaranteed charge injection ≤10pC, and off-leakage <2.5nA at +85°C - all critical for low-error, low-power analog front-end design.

Technical Context

The MAX382EWN integrates parallel N- and P-channel MOSFET switch pairs per channel, driven by internal level translators and a BCD-decoded latch architecture. Its transparent mode (WR low, RS high) enables nonlatching operation like the MAX398, while WR strobing latches the A0–A2 address for persistent channel selection without continuous µP bus hold.

It supports unbalanced supplies (e.g., +10V/–5V), features break-before-make timing (t_OPEN = 100ns min), and maintains analog signal integrity via low on-resistance flatness (≤13Ω), low crosstalk (–92dB), and high off-isolation (–75dB). All logic inputs are fully compatible with TTL and CMOS voltage thresholds across its full operating temperature range.

Key Specifications

Pinout & Package

MAX382EWN is housed in an 18-pin wide SO (Small Outline) package, 0.300" body width, with standard JEDEC MS-013AC footprint and gull-wing leads. Pin 16 is GND; pins 14 and 15 are V+ and V− respectively; COM (pin 9) is the common analog I/O terminal; NO1–NO8 (pins 5–8, 10–13) are bidirectional analog channel inputs; address/control pins (A0, A1, A2, EN, WR, RS) occupy pins 1, 2, 17, 3, 1, and 18 respectively.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX382CPN and MAX382EPN, the MAX382EWN offers identical industrial-grade performance in a space-optimized wide SO package - delivering superior thermal dissipation, board-area savings, and reflow compatibility for modern SMT production, without compromising on leakage, R_ON, or timing specs.

Availability

MAX382EWN is available at Aetrix Electronics and suitable for portable medical devices, automated test equipment, audio routing systems, and low-voltage data-acquisition modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX382EWN 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, medical, and communications applications.

The MAX382EWN belongs to Maxim's low-voltage analog switch/multiplexer product line, engineered specifically for high-fidelity signal routing in resource-constrained, battery-operated, and thermally variable environments.

FAQ

What is the maximum analog signal range supported by the MAX382EWN?

The MAX382EWN supports analog signals from V− to V+, where V− and V+ are the applied supply rails. With ±5V dual supplies, the range is –5V to +5V; with a +5V single supply (V− = GND), it is 0V to +5V. The device guarantees operation across the full range, and analog signals exceeding the rails are clamped by internal diodes - so proper supply sequencing and external protection are advised for overvoltage scenarios. This behavior is consistent across all operating conditions of the MAX382EWN.

Does the MAX382EWN require external pull-up or pull-down resistors on its logic inputs?

No, the MAX382EWN does not require external biasing on A0, A1, A2, EN, WR, or RS inputs. Its TTL/CMOS-compatible thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.4V) and low input leakage (<0.1µA) allow direct connection to microcontroller GPIOs or FPGA outputs. However, floating inputs must be avoided - unused address lines should be tied to V+ or GND to prevent metastability. This applies identically to all logic-controlled functions of the MAX382EWN.

How does the latch function of the MAX382EWN differ from transparent-mode operation?

In transparent mode (WR low, RS high), the MAX382EWN routes analog signals in real time based on current A0–A2 levels - behaving like a non-latching mux. When WR goes high, the present address is latched and held indefinitely, decoupling channel selection from ongoing bus activity. This latch mode reduces µP bus contention and timing overhead. Both modes are fully supported by the MAX382EWN and selectable in-system via WR control.

Can the MAX382EWN operate with unbalanced supplies such as +12V and –5V?

Yes, the MAX382EWN supports unbalanced supplies - the absolute maximum rating specifies V+ to V− ≤ 17V, and functional operation is guaranteed for any combination where V+ ≥ (V− + 2.7V) and |V+| + |V−| ≤ 17V. For example, +12V/–5V yields a 17V total, which is acceptable. Analog signal range becomes V− to V+, so here it would be –5V to +12V. This flexibility is a defined capability of the MAX382EWN and verified across its datasheet specifications.

What is the purpose of the RS (Reset) pin on the MAX382EWN?

The RS pin forces all analog switches to the OFF state when driven low, regardless of address or EN status. It provides hardware-level channel reset for safety-critical transitions, power-up initialization, or fault recovery. After RS returns high, normal operation resumes only when both EN is high and WR is low (transparent mode) or a valid address is latched (latch mode). This deterministic reset behavior is integral to the MAX382EWN's robust control architecture.