The Holtek HT42B534 with USB ICs SOIC-10_150mil RoHS is a USB to UART bridge controller that supports a variety of data rates and baud rates. This IC includes integrated PHY, analog, digital, and crystal tuning components, making it a single chip solution for USB to UART conversion. It is capable of data rates up to 12 Mbps and supports up to 4 UART ports. This chip is fully compliant to USB 2.0 and is RoHS compliant. It features +/- 4.5kV contact ESD, 1.2kV air ESD, and 5.6kV HBM ESD protection to ensure reliable operation in harsh environment. Additionally, this device is pin and package compatible with some of the most popular and reliable devices currently available on the market.