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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9704PWJ | NXP Semiconductors / Freescale | IC GPI 16BIT SPI 18V INT 16TSSOP | - | Tape & Reel (TR) | Surface Mount | 4.5 V ~ 5.5 V | 16-TSSOP (0.173", 4.40mm Width) | - | 16-TSSOP | - | - | |
| PCA9554PWR | N/A | 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) | PCA9554 | 16-TSSOP | - | - | |
| MCP23S08-E/ML | Micrel / Microchip Technology | IC I/O EXPANDER SPI 8B 20QFN | - | Tray | Surface Mount | 1.8 V ~ 5.5 V | 20-VFQFN Exposed Pad | MCP23S08 | 20-QFN-EP (4x4) | - | - | |
| MAX7326AEG+T | Maxim Integrated | IC I/O EXPANDER I2C 16B 24QSOP | - | Tape & Reel (TR) | Surface Mount | 1.71 V ~ 5.5 V | 24-SSOP (0.154", 3.90mm Width) | MAX7326 | 24-QSOP | - | - | |
| PCA6416AHF,128 | NXP Semiconductors / Freescale | IC I/O EXPANDER 16BIT 24HWQFN | - | Cut Tape (CT) | Surface Mount | 1.65 V ~ 5.5 V | 24-WFQFN Exposed Pad | PCA6416 | 24-HWQFN (4x4) | - | - | |
| MCP23009-E/SO | Micrel / Microchip Technology | IC I/O EXPANDER I2C 8B 18SOIC | - | Tube | Surface Mount | 1.8 V ~ 5.5 V | 18-SOIC (0.295", 7.50mm Width) | MCP23009 | 18-SOIC | - | - | |
| PCF8574RGYRG4 | N/A | IC I/O EXPANDER I2C 8B 20VQFN | - | Tape & Reel (TR) | Surface Mount | 2.5 V ~ 6 V | 20-VFQFN Exposed Pad | PCF8574 | 20-VQFN (3.5x4.5) | - | - | |
| MAX7325ATG+T | Maxim Integrated | IC I/O EXPANDER I2C 8B 24TQFN | - | Tape & Reel (TR) | Surface Mount | 1.71 V ~ 5.5 V | 24-WFQFN Exposed Pad | MAX7325 | 24-TQFN (4x4) | - | - | |
| PM8005C-F3EI | Microsemi | 6GB/S 36 PORT SAS EXPANDER WITH | - | - | - | - | - | - | - | - | - | |
| PCA9534PW,112 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 16TSSOP | - | Tube | Surface Mount | 2.3 V ~ 5.5 V | 16-TSSOP (0.173", 4.40mm Width) | PCA9534 | 16-TSSOP | - | - |
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.