Vishay Intertechnology has introduced the VOMHA43A, a compact automotive-grade high-speed optocoupler in a 3.6 mm-wide SOP-5 package. Offering data rates up to 1 MBd, a CTI of 400, and 40 kV/µs minimum CMTI, the device enhances signal integrity while reducing board space in applications requiring isolation voltages up to 707 Vpeak. Qualified to AEC-Q102, it supports isolated communication, fast signal switching, voltage level shifting, and ground isolation across automotive, industrial, building automation, and telecom systems. In EVs, HEVs, and LSEVs, it enables isolated communication for CAN, LIN, I²C, and SPI interfaces, as well as intelligent power module (IPM) driver circuits.
While previous SOP-5 packages offered a width of 4.4 mm, the narrower SOP-5 of the VOMHA43A requires less PCB space, while supporting stackable designs. The device’s minimum CMTI — which is more than double that of the closest competing device — provides enhanced robustness against electrical spikes and RF and EMI issues. And while competing devices offer maximum repetitive peak isolation voltages of 567 Vpeak, the optocoupler’s isolation voltage performance of 707 Vpeak meets the requirements of 400 V battery systems.
The VOMHA43A consists of a GaAlAs infrared emitting diode, optically coupled with an integrated photodetector and a high speed transistor. The photodetector is junction-isolated from the transistor to reduce miller capacitance effects. The optocoupler features an open collector output function that allows designers to adjust load conditions when interfacing with different logic systems, while a Faraday shield on the detector chip allows the device to reject and minimize high input to output common mode transient voltages.
The RoHS-compliant and halogen-free optocoupler operates over a temperature range of -40 °C to +125 °C and is pin to pin compatible with leading competing parts to provide a direct replacement and eliminate the need for electrical and mechanical redesigns.
Samples and production quantities of the VOMHA43A are available now, with lead times of six weeks.
