They transfer digital signals between circuits in both directions and provide complete galvanic isolation between two power domains, all using fewer components to save board space.
The MAX14933 and MAX14937 are the latest additions to Maxim's portfolio of four-channel digital isolators, which includes the MAX14930-MAX14932 and MAX14934-MAX14936. These devices provide best-in-class speed, propagation delay, slant, and jitter for time-sensitive applications, while maintaining a very robust isolation barrier between the two power domains.
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 kVrms and 5 kVrms, respectively. They support DC data rates up to 1.7 MHz and can be used on isolated I²C buses with or without clock stretching. Both products feature 2.25 V to 5.5 V supply points on each side of the isolator and provide open-drain channels for applications requiring bidirectional data transmission on the same line. Applications include power supplies, battery management systems, instrumentation, and interfaces for I²C, SMBus, or PMBus.
Key advantages
• Space saving: Reduces the number of components and system complexity
• Flexible interface: Interfaces with most microcontrollers and FPGAs running at different supply voltages
• Robust galvanic isolation: Over 30 years of service life at nominal operating voltage
