Analog Devices Inc./Maxim Integrated MAX14934EAWE+

Overview

MAX14934EAWE+ from Maxim Integrated is a four-channel, 5kVRMS galvanic digital isolator with unidirectional channel configuration (A→B only), 150Mbps maximum data rate, 1.71V–5.5V dual-supply operation per side, and -40°C to +125°C operating temperature range. It serves as a high-speed, reinforced isolation barrier for SPI, RS-485, and industrial I/O modules in harsh environments.

For engineers reviewing the MAX14934EAWE+ datasheet, MAX14934EAWE+ pinout, MAX14934EAWE+ application, or MAX14934EAWE+ equivalent, this device delivers certified 5kVRMS isolation, sub-8ns propagation delay at 5V, <1ps pulse-width distortion, 25kV/µs CMTI, and seamless level translation between mixed-voltage domains - critical for fieldbus, battery management, and medical isolation designs.

Technical Context

The MAX14934EAWE+ implements capacitive isolation using Maxim's proprietary silicon-dioxide dielectric barrier, supporting asymmetric 1.71V–5.5V supplies on each side. Its A→B unidirectional architecture features four independent input-to-output channels (INA1–INA4 → OUTB1–OUTB4) with active-high enable pins (ENA/ENB) and default-low output state.

It achieves 150Mbps operation via high-speed edge-detection circuitry and low-capacitance (2pF) isolation barrier, enabling clean eye diagrams at full rate. Safety compliance includes UL1577 (5kVRMS/60s), VDE 0884-11 Basic Insulation (VIOWM = 848VRMS, VIORM = 1200VP), and ±10kV surge per IEC 61000-4-5.

Key Specifications

Pinout & Package

Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), RoHS-compliant, creepage/clearance ≥8mm, θJA = 71°C/W (4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital isolator applications.

Compared with Si8641ED-B-IS and ADUM4401BRWZ, the MAX14934EAWE+ uniquely combines 150Mbps speed, 1.71V–5.5V dual-supply flexibility, default-low outputs, and guaranteed 25kV/µs CMTI - making it optimal for next-generation high-speed, safety-critical isolation where timing precision and fail-safe behavior are non-negotiable.

Availability

MAX14934EAWE+ is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, isolated SPI master-slave links, and battery management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX14934EAWE+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on reliability and integration.

The MAX14934–MAX14936 family targets high-speed, safety-certified digital isolation in harsh environments - specifically engineered for industrial automation, energy infrastructure, and medical systems demanding 5kVRMS reinforcement and extended temperature operation.

FAQ

What is the maximum data rate supported by the MAX14934EAWE+?

The MAX14934EAWE+ supports a maximum data rate of 150Mbps, verified across its full operating temperature range (-40°C to +125°C) and supply voltage range (1.71V to 5.5V). This is achieved using high-speed edge-detection circuitry and a low-capacitance isolation barrier, enabling reliable operation in high-frequency SPI, fast GPIO, and digital I/O applications without signal degradation.

Does the MAX14934EAWE+ support level translation between different voltage domains?

Yes, the MAX14934EAWE+ supports true bidirectional level translation: VDDA can operate from 1.71V to 5.5V independently of VDDB, which also ranges from 1.71V to 5.5V. This allows direct interfacing between 1.8V FPGAs and 5V RS-485 transceivers, or 3.3V microcontrollers and 2.5V sensors, without external level-shifting components - all while maintaining 5kVRMS galvanic isolation.

What safety certifications does the MAX14934EAWE+ hold?

The MAX14934EAWE+ is certified to UL1577 (5kVRMS/60s), CSA cUL (equivalent to UL), VDE 0884-11 Basic Insulation (VIOWM = 848VRMS, VIORM = 1200VP), and IEC 61000-4-5 (±10kV surge). These approvals validate its use in reinforced insulation applications per IEC 61010-1, IEC 60601-1, and IEC 60950-1 standards - critical for industrial and medical end equipment.

What is the default output state of the MAX14934EAWE+ when inputs are unpowered?

The MAX14934EAWE+ has a default-low output state: when INA1–INA4 are unpowered or floating, OUTB1–OUTB4 drive low. This fail-safe behavior ensures predictable, safe operation during power sequencing, brownouts, or controller reset - especially important for driving relays, valves, or enable lines in safety-critical systems.

How does the MAX14934EAWE+ handle common-mode transients?

The MAX14934EAWE+ achieves 25kV/µs common-mode transient immunity (CMTI), measured per JEDEC standard with 1000V common-mode step applied between GNDA and GNDB. This high CMTI rating prevents data corruption in electrically noisy environments such as motor drives, inverters, and switch-mode power supplies - ensuring robust digital signal integrity across the isolation barrier.