component
MCP23009-E
Public Made by Adomby adom
Microchip Tech I/O Expanders, VQFN-16-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownMCP23009-E
Microchip Tech · I/O Expanders · VQFN-16-EP(3x3)
MCP23009-E from Microchip Tech, in a VQFN-16-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VSS | power_in | Ground pin. |
| 2 | NC | unconnected | Not connected. |
| 3 | VDD | power_in | Power supply pin; operating voltage 1.8V to 5.5V. |
| 4 | SCL | input | Serial clock input for the I2C interface. |
| 5 | SDA | bidirectional | Serial data I/O for the I2C interface. |
| 6 | ADDR | input | Hardware address pin allowing up to eight slave devices on the bus. |
| 7 | RESET | input | Hardware reset input. |
| 8 | INT | output | Interrupt output for the port, configurable as active-high, active-low or open-drain. |
| 9 | GP0 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 10 | GP1 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 11 | GP2 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 12 | GP3 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 13 | GP4 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 14 | GP5 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 15 | GP6 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 16 | GP7 | bidirectional | Bidirectional I/O pin with 5.5V tolerant input and open-drain output, can be enabled for interrupt on change and/or internal pull-up resistor. |
| 17 | EP | passive | Exposed thermal pad that can be left floating or connected to VSS. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | VQFN-16-EP(3x3) |
| Category | Interface ICs |
| Pins | 17 |
CAD (KiCad official)
- Symbol:
MCP23009-E - Footprint:
Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm - 3D model: VQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
mcp23009-e-etched.step/mcp23009-e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp23009-e.step/mcp23009-e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (52 pp, sha256
70744ea2313e65a6, retrieved 2026-10-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).