General Description

tor utilizing Maxim’s proprietary process technology. For

MAX14937 data sheet. The MAX14933 transfers digital

signals between circuits with different power domains at

ambient temperatures up to +125°C.

The device offers two bidirectional, open-drain channels

transmitted in both directions on the same line. To prevent

latch-up action, the A-side outputs comprise special buf-

fers that regulate the logic-low voltage at 0.9V (max), and

the input logic-low threshold is at least 50mV lower than

the output logic-low voltage. The B side features conven-

tional buffers that do not regulate logic-low output voltage.

The device features independent 2.25V to 5.5V

supplies on each side of the isolator. The device operates

with clock stretching.

The MAX14933 is available in both a 16-pin wide-body

(10.3mm x 7.5mm) and narrow-body (9.9mm x 3.9mm)

SOIC package. All devices are rated for operation at

ambient temperatures of -40°C to +125°C.

Applications

● Power Supplies

● Battery Management

● Instrumentation

Benefits and Features

● Robust Galvanic Isolation of Digital Signals

• Withstands ±10kV Surge per IEC 61000-4-5

• 2 Packages (4mm or 8mm Creepage and Clearance)

● Interfaces Directly with Most Micros and FPGAs

• Accepts 2.25V to 5.5V Supplies

• Bidirectional Data Transfer from DC to 1.7MHz

● Low Power Consumption

• 5.3mA per Channel Typical at 1.7MHz

Safety Regulatory Approvals

• UL According to UL1577

• cUL According to CSA Bulletin 5A

• VDE 0884-11 Basic Insulation

Ordering Information appears at end of data sheet.

PMBus is a trademark of SMIF, Inc.

19-7533; Rev 4; 11/20

Functional Diagram

DIGITAL

ISOLATOR

MAX14933

GNDA

GNDB

I/OB1

I/OA1

I/OB2

I/OA2

MAX14933

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