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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MCP23008T-E/SO | Micrel / Microchip Technology | IC I/O EXPANDER I2C 8B 18SOIC | - | Tape & Reel (TR) | Surface Mount | 1.8 V ~ 5.5 V | 18-SOIC (0.295", 7.50mm Width) | MCP23008 | 18-SOIC | - | - | |
| PCA9701D,118 | NXP Semiconductors / Freescale | IC SPI GPI 16-BIT 24-SOIC | - | Tape & Reel (TR) | Surface Mount | 2.5 V ~ 5.5 V | 24-SOIC (0.295", 7.50mm Width) | PCA9701 | 24-SO | - | - | |
| PCA9538DW | N/A | IC I/O EXPANDER I2C 8B 16SOIC | - | Tube | Surface Mount | 2.3 V ~ 5.5 V | 16-SOIC (0.295", 7.50mm Width) | PCA9538 | 16-SOIC | - | - | |
| MAX1609EEE | Maxim Integrated | IC EXPANDER OCTAL BUS 16-QSOP | - | Tube | Surface Mount | 2.7 V ~ 5.5 V | 16-SSOP (0.154", 3.90mm Width) Exposed Pad | MAX1609 | 16-QSOP | - | - | |
| CAT9554HV4I-GT2 | AMI Semiconductor / ON Semiconductor | IC I/O EXPANDER I2C/SMBUS 16TQFN | - | Tape & Reel (TR) | Surface Mount | 2.3 V ~ 5.5 V | 16-WQFN Exposed Pad | CAT9554 | 16-TQFN (4x4) | - | - | |
| PCF8575DGVR | N/A | IC I/O EXPANDER I2C 16B 24TVSOP | - | Tape & Reel (TR) | Surface Mount | 2.5 V ~ 5.5 V | 24-TFSOP (0.173", 4.40mm Width) | PCF8575 | 24-TVSOP | - | - | |
| CP82C55A-5 | Intersil | IC I/O EXPANDER 24B 40DIP | - | Tube | Through Hole | 4.5 V ~ 5.5 V | 40-DIP (0.600", 15.24mm) | 82C55A | 40-DIP | - | - | |
| PCF8575CTS/1,118 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 16B 24SSOP | - | Tape & Reel (TR) | Surface Mount | 4.5 V ~ 5.5 V | 24-SSOP (0.209", 5.30mm Width) | PCF8575 | 24-SSOP | - | - | |
| XRA1201PIG24-F | Exar Corporation | IC I/O PORT EXPANDER I2C 24TSSOP | - | Tube | Surface Mount | 1.65 V ~ 3.6 V | 24-TSSOP (0.173", 4.40mm Width) | - | 24-TSSOP | - | - | |
| PCA9673DB,112 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 16B 24SSOP | - | Tube | Surface Mount | 2.3 V ~ 5.5 V | 24-SSOP (0.209", 5.30mm Width) | PCA9673 | 24-SSOP | - | - |
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.