| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Features | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Voltage - Supply | Output Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DS4520E-W | Maxim Integrated | IC I/O EXPANDER W/MEMORY 16TSSOP | - | -40°C ~ 85°C | EEPROM, POR | Tube | Surface Mount | - | - | 2.7 V ~ 5.5 V | Open Drain | |
| PI4IOE5V9673ZDEX | Diodes Incorporated | IC I/O EXPANDER 16B I2C 24TQFN | - | -40°C ~ 85°C | - | - | - | - | - | 2.3 V ~ 5.5 V | - | |
| XRA1207IG24-F | Exar Corporation | IC I/O PORT EXPANDER I2C 24TSSOP | - | -40°C ~ 85°C | - | Tube | Surface Mount | - | - | 1.65 V ~ 3.6 V | Open Drain | |
| PCF8575RGER | N/A | IC I/O EXPANDER I2C 16B 24VQFN | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 4.5 V ~ 5.5 V | Push-Pull | |
| PCA9555APW,118 | NXP Semiconductors / Freescale | IC GPIO EXPANDER 24TSSOP | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 1.65 V ~ 5.5 V | Push-Pull | |
| PCA9703PW/Q900,118 | NXP Semiconductors / Freescale | IC GPI 16-BIT SPI 24-TSSOP | - | - | - | Cut Tape (CT) | Surface Mount | - | - | 4.5 V ~ 5.5 V | Push-Pull | |
| PCA9554ATS,118 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 20SSOP | - | -40°C ~ 85°C | POR | Tape & Reel (TR) | Surface Mount | - | - | 2.3 V ~ 5.5 V | Push-Pull | |
| PCF8575CDBE4 | N/A | IC I/O EXPANDER I2C 16B 24SSOP | - | -40°C ~ 85°C | POR | Tube | Surface Mount | - | - | 4.5 V ~ 5.5 V | Open Drain | |
| PCA8574AN,112 | NXP Semiconductors / Freescale | IC I/O EXPANDER I2C 8B 16DIP | - | -40°C ~ 85°C | POR | Tube | Through Hole | - | - | 2.3 V ~ 5.5 V | Push-Pull | |
| CP82C55A | Intersil | IC I/O EXPANDER 24B 40DIP | - | 0°C ~ 70°C | - | Tube | Through Hole | - | - | 4.5 V ~ 5.5 V | Open Drain |
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.