Analog Devices Inc./Maxim Integrated MAX14432FASE+T

Overview

The MAX14432FASE+T from Analog Devices is a 4-channel, unidirectional, high-speed digital galvanic isolator in a 16-pin narrow SOIC package with 3.75kVRMS isolation rating, 200Mbps data rate, and default-low output logic. It operates across dual independent 1.71V–5.5V supplies and delivers 50kV/μs CMTI for robust noise immunity in industrial fieldbus and isolated RS-485 interfaces.

For engineers reviewing the MAX14432FASE+T datasheet, MAX14432FASE+T pinout, MAX14432FASE+T application, or MAX14432FASE+T equivalent, this device is selected for high-speed, low-power isolation where precise timing control, fail-safe default states, and UL/cUL-certified 3.75kVRMS withstand voltage are required in space-constrained industrial and medical systems.

Technical Context

The MAX14432FASE+T implements capacitive isolation with proprietary process technology, supporting unidirectional channel configuration (A→B only) and active-low output enable. Its architecture enables simultaneous operation of all four channels at up to 200Mbps while maintaining sub-10ns propagation delay skew and <2ns pulse width distortion across temperature.

It features integrated undervoltage lockout (1.5V–1.66V threshold), fail-safe delay (50µs), and dual-side supply monitoring - enabling reliable operation in mixed-voltage systems such as isolated SPI masters interfacing with 1.8V sensors and 3.3V controllers.

Key Specifications

Pinout & Package

Package: 16-pin narrow-body SOIC (4mm creepage/clearance, CTI ≥600, Group I material).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14432FASE+T uniquely combines 200Mbps speed, default-low fail-safe outputs, and 50kV/μs CMTI in a UL-certified 3.75kVRMS narrow SOIC - making it optimal for high-integrity, high-speed industrial and medical isolation where deterministic state behavior is non-negotiable.

Availability

MAX14432FASE+T is available at Aetrix Electronics and suitable for industrial fieldbus nodes, isolated RS-485 gateways, and battery management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX14432FASE+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The MAX14430–MAX14432 family was designed specifically for high-speed, low-power galvanic isolation in harsh electromagnetic environments - targeting applications demanding both regulatory compliance (UL/cUL) and sub-10ns timing precision.

FAQ

What is the isolation voltage rating of the MAX14432FASE+T?

The MAX14432FASE+T has a 3.75kVRMS isolation rating for 60 seconds in its narrow SOIC package, certified to UL1577 and CSA Bulletin 5A standards. This rating applies to reinforced insulation and supports working voltages up to 445VRMS (VIOWM). The QSOP variant is rated at 3kVRMS, but MAX14432FASE+T specifically uses the narrow SOIC package.

Does the MAX14432FASE+T support bidirectional communication?

No, the MAX14432FASE+T is a unidirectional isolator with fixed A→B channel direction. It provides four independent input-to-output channels (IN1–IN4 → OUT1–OUT4) and does not support reverse signal flow. For bidirectional isolation, designers must pair it with a complementary device or select a different variant from the MAX14430–MAX14432 family.

What is the meaning of "FASE" in MAX14432FASE+T?

The "FASE" suffix in MAX14432FASE+T denotes a specific configuration: F = 200Mbps data rate, A = unidirectional (A→B), S = narrow SOIC package, E = default-low output logic. This exact ordering code identifies the device as a 4-channel, high-speed, fail-safe-low isolator in the industry-standard 16-pin narrow SOIC footprint.

Can the MAX14432FASE+T operate with mismatched supply voltages on each side?

Yes, the MAX14432FASE+T supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), enabling true level translation. For example, VDDA can be 1.8V (for a low-power sensor interface) while VDDB is 3.3V (for a microcontroller), with no external components required - a key advantage over optocouplers or older isolator generations.

How does the fail-safe behavior of the MAX14432FASE+T work?

The MAX14432FASE+T features default-low outputs: when any input (INx) is unpowered, floating, or below VIH threshold, the corresponding OUTx transitions to and holds a logic-low state within 50µs. This behavior is hardware-defined and requires no configuration - ensuring predictable shutdown in fault conditions, which is critical for safety-critical BMS and industrial control applications using MAX14432FASE+T.