| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Voltage - Supply | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MCP23S09-E/P | Micrel / Microchip Technology | IC I/O EXPANDER SPI 8B 18DIP | - | -40°C ~ 125°C | - | Tube | Through Hole | - | - | 1.8 V ~ 5.5 V | Open Drain | |
| XRA1207IL24TR-F | Exar Corporation | IC I/O PORT EXPANDER 16 BIT I2C | - | -40°C ~ 85°C | - | - | - | - | - | 1.65 V ~ 3.6 V | Open Drain | |
| IP82C55A | Intersil | IC I/O EXPANDER 24B 40DIP | - | -40°C ~ 85°C | - | Tube | Through Hole | - | - | 4.5 V ~ 5.5 V | Open Drain | |
| PCA9574HR,115 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 16HXQFN | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 1.1 V ~ 3.6 V | Push-Pull | |
| PCAL9538APWJ | NXP Semiconductors / Freescale | IC GPIO EXPANDER 16TSSOP | Agile | -40°C ~ 85°C | POR | Cut Tape (CT) | Surface Mount | - | - | 1.65 V ~ 5.5 V | Open Drain, Push-Pull | |
| MCP23018T-E/SO | Micrel / Microchip Technology | IC I/O EXPANDER I2C 16B 28SOIC | - | -40°C ~ 125°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 1.8 V ~ 5.5 V | Open Drain | |
| PCF8574DGVR | N/A | IC I/O EXPANDER I2C 8B 20TVSOP | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 2.5 V ~ 6 V | Push-Pull | |
| PCA8574TS,112 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 20SSOP | - | -40°C ~ 85°C | POR | Tube | Surface Mount | - | - | 2.3 V ~ 5.5 V | Push-Pull | |
| MCP23S17-E/ML | Micrel / Microchip Technology | IC I/O EXPANDER SPI 16B 28QFN | - | -40°C ~ 125°C | POR | Tube | Surface Mount | - | - | 1.8 V ~ 5.5 V | Push-Pull | |
| PCF8574RGTR | N/A | IC I/O EXPANDER I2C 8B 16VQFN | - | -40°C ~ 85°C | POR | Cut Tape (CT) | Surface Mount | - | - | 2.5 V ~ 6 V | Push-Pull |
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.