Analog Devices Inc./Maxim Integrated MAX14434EAWE+T

Overview

MAX14434EAWE+T from Maxim Integrated is a four-channel, unidirectional, 200Mbps digital galvanic isolator with 5kVRMS isolation rating, 1.71V–5.5V dual-supply operation per side, and default-high outputs. It transfers digital signals across isolated power domains in SPI, RS-485, and industrial I/O systems while consuming only 1.1mW per channel at 1Mbps (3.3V).

For engineers reviewing the MAX14434EAWE+T datasheet, MAX14434EAWE+T pinout, MAX14434EAWE+T application, or MAX14434EAWE+T equivalent, this device supports high-speed, low-power, safety-certified isolation for fieldbus interfaces, battery management systems, and medical equipment requiring robust CMTI (>50kV/μs) and wide temperature operation (–40°C to +125°C).

Technical Context

The MAX14434EAWE+T implements capacitive isolation using Maxim's proprietary process, enabling bidirectional signal transfer across an integrated dielectric barrier without magnetic coupling. Its architecture supports independent 1.71V–5.5V supplies on each side, allowing level translation between disparate logic domains.

It features active-high enable inputs (ENA/ENB), default-high output states, and unidirectional channel configuration (A→B only). The device meets UL1577 and CSA Bulletin 5A safety standards with 5kVRMS withstand voltage (60s), 848VRMS working voltage, and ±10kV surge immunity (1.2/50μs).

Key Specifications

Pinout & Package

Package: 16-pin wide-body SOIC (W16MS+12), 8mm creepage/clearance, CTI ≥ 600V (Group I).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISO6741QDWR and ADUM140E0BRZ, the MAX14434EAWE+T delivers 33% higher data rate than the ADUM140E0BRZ and double the isolation rating of the ISO6741QDWR-making it uniquely suited for high-speed, safety-certified applications like EV battery controllers and Class II medical devices.

Availability

MAX14434EAWE+T is available at Aetrix Electronics and suitable for industrial fieldbus communication, battery management systems, and medical patient monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for MAX14434EAWE+T 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 interface ICs for demanding industrial, automotive, and medical applications.

The MAX14434–MAX14436 family was engineered specifically for high-speed, low-power galvanic isolation in safety-critical systems-balancing 200Mbps throughput, 5kVRMS certification, and ultra-low 1.1mW/channel consumption.

FAQ

What is the maximum data rate supported by the MAX14434EAWE+T?

The MAX14434EAWE+T supports a maximum data rate of 200Mbps under conditions of 2.25V ≤ VDD ≤ 5.5V. At lower supply voltages (1.71V–1.89V), the guaranteed maximum drops to 150Mbps. This performance enables high-speed SPI, RS-485, and digital I/O isolation without timing bottlenecks in real-time control systems.

Does the MAX14434EAWE+T require external pull-up or pull-down resistors on its input pins?

No, the MAX14434EAWE+T does not require external pull-up or pull-down resistors on IN1–IN4. Input pins have no internal termination; however, ENA and ENB feature internal 5µA pullups to their respective supplies (VDDA and VDDB). External resistors are only needed if system logic requires stronger biasing or noise immunity beyond the internal pullup strength.

What safety certifications does the MAX14434EAWE+T hold?

The MAX14434EAWE+T is certified to UL1577 (File E351759) and CSA Bulletin 5A (File E351759) for 5000VRMS isolation voltage. It meets IEC 60747-5-5 requirements with VIOWM = 848VRMS, VIOSM = ±10kV surge, and CMTI ≥ 50kV/μs-making it suitable for reinforced insulation in industrial and Class BF medical applications.

Can the MAX14434EAWE+T operate with different supply voltages on Side A and Side B?

Yes, the MAX14434EAWE+T supports independent supply rails: VDDA (1.71V–5.5V) on Side A and VDDB (1.71V–5.5V) on Side B. This allows seamless level translation-for example, interfacing a 1.8V FPGA I/O bank to a 3.3V RS-485 transceiver-without external level shifters or voltage translators.

What is the propagation delay variation across temperature and voltage for the MAX14434EAWE+T?

The MAX14434EAWE+T exhibits tPLH from 4.1ns (min, VDD ≥ 4.5V) to 20.3ns (max, VDD = 1.71V–1.89V) and tPHL from 4.3ns to 21.7ns. Over temperature (–40°C to +125°C), delay increases by ≤ 5ns across all VDD conditions-ensuring predictable timing margins in automotive and industrial environments.