| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Voltage - Supply | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCA9538APWJ | NXP Semiconductors / Freescale | IC GPIO EXPANDER 8BIT 16TSSOP | - | -40°C ~ 85°C | POR | Original-Reel® | Surface Mount | - | - | 1.65 V ~ 5.5 V | Push-Pull | |
| W83L603G | Nuvoton Technology Corporation America | IC I/O EXPANDER SMBUS 8B 14SOIC | - | 0°C ~ 70°C | Buzzer Outputs, LED Outputs, POR | Tube | Surface Mount | - | - | 3.3V | Open Drain, Push-Pull | |
| PCF8574TS/3,118 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 20SSOP | - | -40°C ~ 85°C | POR | Cut Tape (CT) | Surface Mount | - | - | 2.5 V ~ 6 V | Push-Pull | |
| MCP23016T-I/SO | Micrel / Microchip Technology | IC I/O EXPANDER I2C 16B 28SOIC | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 2 V ~ 5.5 V | Push-Pull | |
| MCP23S08-E/P | Micrel / Microchip Technology | IC I/O EXPANDER SPI 8B 18DIP | - | -40°C ~ 125°C | POR | Tube | Through Hole | - | - | 1.8 V ~ 5.5 V | Push-Pull | |
| MIC74BQS-TR | Micrel / Microchip Technology | IC I/O EXPANDER I2C 8B 16QSOP | - | -40°C ~ 85°C | Fan Speed Controller | Tape & Reel (TR) | Surface Mount | - | - | 2.7 V ~ 3.6 V | Open Drain, Push-Pull | |
| MCP23S09-E/MG | Micrel / Microchip Technology | IC I/O EXPANDER SPI 8B 16QFN | - | -40°C ~ 125°C | - | Tube | Surface Mount | - | - | 1.8 V ~ 5.5 V | Open Drain | |
| XRA1404IG16-F | Exar Corporation | IC I/O EXPANDER SPI 8B 16TSSOP | - | -40°C ~ 85°C | - | Tube | Surface Mount | - | - | 1.65 V ~ 3.6 V | Open Drain | |
| PCF8575DB | N/A | IC I/O EXPANDER I2C 16B 24SSOP | - | -40°C ~ 85°C | POR | Tube | Surface Mount | - | - | 2.5 V ~ 5.5 V | Push-Pull | |
| PCF8574APW | N/A | IC I/O EXPANDER I2C 8B 20TSSOP | - | -40°C ~ 85°C | POR | Tube | 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.