I/O Expanders
ICs for increasing input/output capacity in microcontroller-based systems
I/O expanders add extra digital inputs and outputs to microcontrollers and processors without needing more pins. An I/O expander is ideal for applications like keypads, LEDs, and sensors where pin count is limited but flexibility is key. Integrated I/O expanders connect over I2C, SPI, or serial interfaces to streamline board layout and simplify wiring. Use Octopart to quickly find the I/O expander ICs or other interface components you need. You can then compare suppliers, view datasheets, and check real-time pricing and availability.
I/O Expanders Popular Parts
TCA6408ARSVR
1μA, 10mA, 25mA, I2C, SMBus, 8-Pin, 1.65V-5.5V, 400kHz, UQFN-16, SMD, Adhesive Mount, 550μm H
TXS02612RTWR
SDIO Port Expander With Voltage-Level Translation 24-WQFN -40 to 85
PCAL6524HEAZ
200mA 25mA 25mA I2C 24 1.65V 5.5V 1MHz yes HUQFN-32 SMD mount，glue mount 5mm*5mm*560μm
PCF8574T/3,518
PCF8574 Series 2.5 - 6V Remote 8-bit I/O Expander for I2C-bus - SOIC-16
TCA9539QPWRQ1
IC, I2C, SMBus, 16-Ch, 1.65V-3.6V, 400kHz, TSSOP-24, SMD, Adhesive Mount, 1.2mm H
PCA9555PW,118
PCA9555 Series 5.5V 160mA 400 kHz 16-bit I2C-bus and SMBus I/O Port-TSSOP-24
PCAL6416AHF,128
PCAL6416A Series 5.5V 400 kHz 125 uA 16-Bit I/O Surface Mount I2C-Bus - HWQFN-24
PCA9506BS,118
PCA9506 Series 40-Bit I2C-Bus I/O Port with RESET OE and INT - HVQFN - 56
MCP23017-E/SS
I²C Bus IC Operating temperature: -40...+125 °C Power supply: 1.8...5.5 V Package: SSOP-20
PCF8574DWR
8-bit 2.5- to 5.5-V I2C/SMBus I/O expander with interrupt 16-SOIC -40 to 85
MCP23017T-E/SS
MCP23017 Series 5.5 V 1.7 MHz SMT 16-Bit I2C I/O Expander - SSOP-28
PI4IOE5V6416ZDEX
10mA 25mA I2C 16 1.65V 5.5V 400KHz yes VQFN-404024 SMD mount，glue mount 290mm(Length)