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| Image | Part Number | Manufacturer | Description | Series | Packaging | Mounting Type | Voltage - Supply | Package / Case | Base Part Number | Supplier Device Package | Data Format | Baud Rates |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCF8574T/3,512 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 16SOIC | - | Tube | Surface Mount | 2.5 V ~ 6 V | 16-SOIC (0.295", 7.50mm Width) | PCF8574 | 16-SO | - | - | |
| TCA6416PW | N/A | IC I/O EXPANDER I2C 16B 24TSSOP | - | Tube | Surface Mount | 1.65 V ~ 5.5 V | 24-TSSOP (0.173", 4.40mm Width) | TCA6416 | 24-TSSOP | - | - | |
| DS4550E+ | Maxim Integrated | IC I/O EXPANDER I2C 9B 20TSSOP | - | Tube | Surface Mount | 2.7 V ~ 5.5 V | 20-TSSOP (0.173", 4.40mm Width) | DS4550 | 20-TSSOP | - | - | |
| PCF8575DWR | N/A | IC I/O EXPANDER I2C 16B 24SOIC | - | Tape & Reel (TR) | Surface Mount | 2.5 V ~ 5.5 V | 24-SOIC (0.295", 7.50mm Width) | PCF8575 | 24-SOIC | - | - | |
| PCA9674PW/S911,118 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 16TSSOP | - | Tape & Reel (TR) | Surface Mount | 2.3 V ~ 5.5 V | 16-TSSOP (0.173", 4.40mm Width) | PCA9674 | 16-TSSOP | - | - | |
| PCA9539DBR | N/A | IC I/O EXPANDER I2C 16B 24SSOP | - | Tape & Reel (TR) | Surface Mount | 2.3 V ~ 5.5 V | 24-SSOP (0.209", 5.30mm Width) | PCA9539 | 24-SSOP | - | - | |
| MCP25055T-I/SL | Micrel / Microchip Technology | IC I/O EXPANDER CAN 8B 14SOIC | - | Tape & Reel (TR) | Surface Mount | 2.7 V ~ 5.5 V | 14-SOIC (0.154", 3.90mm Width) | MCP25055 | 14-SOIC | - | - | |
| XRA1206IG16-F | Exar Corporation | IC I/O PORT EXPANDER I2C 16TSSOP | - | Tube | Surface Mount | 1.65 V ~ 3.6 V | 16-TSSOP (0.173", 4.40mm Width) | - | 16-TSSOP | - | - | |
| PI4IOE5V9570UEX | Diodes Incorporated | IC I/O EXPANDER 4 BIT 8-MSOP | - | - | - | 2.3 V ~ 5.5 V | - | - | - | - | - | |
| MCP23S17-E/SP | Micrel / Microchip Technology | IC I/O EXPANDER SPI 16B 28SDIP | - | Tube | Through Hole | 1.8 V ~ 5.5 V | 28-DIP (0.300", 7.62mm) | MCP23S17 | 28-SPDIP | - | - |
I/O expanders are integrated circuits or modules used to increase the number of input and output (I/O) pins available to a microcontroller or other digital device. They typically use serial communication interfaces such as I2C or SPI to communicate with the host controller and provide additional GPIO (General Purpose Input/Output) pins for connecting sensors, actuators, and other peripherals. I/O expanders are commonly used in embedded systems, IoT (Internet of Things) devices, and industrial automation applications where the number of available I/O pins on the microcontroller is limited.