NXP PCA9518PW,112 i2C I/O Expander TSSOP (Pk of 2)
Manufactured by NXP - Part # PCA9518PW,112. i2C and SMBus compatible. The I2C-bus capacitance limit of 400 pF restricts the number of devices and bus length. Pin Count 20. 0Hz to 400kHz clock frequency.