PCF8574 / MCP23017 I/O Expanders Family (6 parts in our catalog)
NXP PCF8574/PCF8575 and Microchip MCP23017/MCP23008 I2C/SPI port expanders. Add 8 or 16 GPIO pins to any MCU when you run out of native I/O.
Sub-families
| Sub-family | Variants | Core | Max Speed | Features |
|---|---|---|---|---|
| GENERAL PURPOSE | ||||
| MCP23017T | 3 | CMOS 16-bit I/O Expander | 1.7 MHz | HS INT LV AUTO |
| MCP23017 | 2 | CMOS 16-bit I/O Expander | 1.7 MHz | I2C LV HS |
| PCF8575T | 1 | CMOS 16-bit Remote I/O | 400 kHz | I2C INT LV |
Popular Variants
Top variants from across the family, with specs that differentiate them.
| Part Number | Sub-family | Package | Stock |
|---|---|---|---|
| MCP23017T-E/ML | MCP23017T | VQFN-28 | 32,477 |
| MCP23017T-E/SO | MCP23017T | SOIC-28 | 17,172 |
| MCP23017T-E/SS | MCP23017T | SSOP-28 | 32,890 |
