Texas Instruments Pca9535Dwr .
I/O EXPANDER, 16 BIT, 400KHZ, SOIC-24; C; I/O EXPANDER, 16 BIT, 400KHZ, SOIC-24; Chip Configuration:16bit; Bus Frequency:400kHz; IC Interface Type:I2C, SMBus; Supply Voltage Min:2.3V; Supply Voltage Max:5.5V; Interface Case Style:SOIC; No. of Pins:24Pins; Product Range:-