| Part Number | MCP23008-E/SO | MCP23009-E/SO | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Interface - I/O Expanders | Interface - I/O Expanders | 
|   |   | |
| Product Status | Active | Active | 
| Number of I/O | 8 | 8 | 
| Interface | I²C | I²C | 
| Interrupt Output | Yes | Yes | 
| Features | POR | POR | 
| Output Type | Push-Pull | Open Drain | 
| Current - Output Source/Sink | 25mA | 25mA | 
| Clock Frequency | 1.7 MHz | 3.4 MHz | 
| Voltage - Supply | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 18-SOIC (0.295", 7.50mm Width) | 18-SOIC (0.295", 7.50mm Width) | 
| Supplier Device Package | 18-SOIC | 18-SOIC |