Maxim Integrated MAX14933 and MAX14937 two-channel, bidirectional digital isolators

Designers can save space and achieve flexible designs with the MAX14933 and MAX14937 two-channel, bidirectional digital isolators from Maxim Integrated Products. They transfer digital signals between circuits in both directions and provide complete galvanic isolation between two power domains, all while using fewer components. Digital isolators are replacing optocouplers in many applications because they offer the same isolation capabilities while using less board space and consuming less power.

The MAX14933 and MAX14937 provide high voltage isolation of 2.75 or 5 kV_RMS, respectively. The MAX14933 is available in both a 16-pin wide-body (10.3 x 7.5 mm) and narrow-body (9.9 x 3.9 mm) SOIC package. The MAX14937 is available in a 16-pin wide-body (10.3 x 7.5 mm) SOIC package. They support data rates from DC up to 1.7 MHz and can be used in isolated I²C buses with or without clock stretching.

Both products feature independent 2.25 to 5.5 V supplies on each side of the isolator and provide open-drain channels for applications that require data to be transmitted in both directions on the same line. Both products are specified over the -40 to +125°C temperature range. Applications include power supplies, battery management systems, instrumentation and interfaces for I²C, SMBus or PMBus.