The TDA8035HN/C1/S1J is an interface IC manufactured by NXP. It is a specialized smart card interface that provides high speed, low power, and high reliability for contactless smart card connections. The IC is capable of working up to 8MHz, and five modes of operation are supported, including I2C, UART, SPI, ISO7816-3, and Clock/Data. It features 2mA quiescent current, selectable voltage supply and clocking, minimal latency, and error detection and correction. In addition, the unit integrates several internally generated and externally supplied clocks, card reset detection, and write protect from the SEEPROM and I2C interface.