I/O Expanders

Devices in this family are used in conjunction with microcontrollers, microprocessors, or similar devices for the purpose of increasing the number of signal connections available for connecting peripheral devices. The typical concept of operation involves the use of serial communications requiring only a few I/O lines on the host device to read/write the status of many input/output pins on the expander device. The technique exchanges speed of communication for increased connectivity, and is best suited for applications where fast response is not critical, such as in many human interface applications.

Part Number Manufacturer Description Quantity Price Option
PI4IOE5V9522UEX Diodes Incorporated IC I/O EXPANDER 4 BIT 8-MSOP 0 $0.42
PI4IOE5V9521XTEX Diodes Incorporated INTERFACE IO EXPANDER U-QFN1616- 0 $0.35
PCA9534ADWR Texas Instruments IC I/O EXPANDER I2C 8B 16SOIC 0 $0.00
MAX7319AEE+ Maxim Integrated IC I/O EXPANDER I2C 8B 16QSOP 4 $4.15
MCP23016-I/ML Microchip Technology IC I/O EXPANDER I2C 16B 28QFN 17 $1.74
PCA9554ADB Texas Instruments IC I/O EXPANDER I2C 8B 16SSOP 23 $1.58
PCA9554ADW Texas Instruments IC I/O EXPANDER I2C 8B 16SOIC 94 $1.58
PCA9557DBR Texas Instruments IC I/O EXPANDER I2C 8B 16SSOP 81 $0.00
XRA1201PIL24-F MaxLinear, Inc. IC I/O PORT EXPANDER I2C 24QFN 5 $1.57
PCA9554D,118 NXP USA Inc. IC I/O EXPANDER I2C 8B 16SOIC 0 $0.00