MCP23017 in PCF8574 / MCP23017 I/O Expanders Family
The MCP23017 is a versatile 16-bit I/O expander family manufactured by Microchip Technology, designed to provide peripheral expansion for microcontrollers via the I2C serial interface. It allows developers to add sixteen general-purpose input/output pins using only two bus lines. Featuring high-speed clock support and configurable interrupt outputs, this family is a staple for designs where GPIO count is limited on the primary MCU, offering a reliable, low-drift solution for system monitoring and control.
Variants in This Sub-Family
| Part Number | Difference | Stock |
|---|---|---|
| MCP23017-E/ML (Microchip Technology) | ML | 54,416 |
| MCP23017-E/SS (Microchip Technology) | S | 16,973 |
| MCP23017-E/SO (Microchip Technology) | O | 42,753 |
Variants within the MCP23017 sub-family primarily differ by their physical packaging to suit various PCB assembly requirements. The -E/SP suffix denotes the 28-lead Skinny DIP for prototyping, while -E/SO and -E/SS represent SOIC and SSOP surface-mount packages respectively. The -E/ML variant provides a compact 4x4 mm QFN package for space-constrained designs. All variants share identical electrical specifications and I2C command sets.
