I2C Interface, I2C serial protocol, two wire interface, UART, SPI, I2C - tatanh1983/conchodom GitHub Wiki
PCF8575 Series Remote 16-bit I/O Expander for I2C-Bus to Parallel Port -SSOP-24
https://www.futureelectronics.com/p/semiconductors--comm-products--i2c/pcf8575ts-1-118-nxp-7247653