component
MCP23008T-E
Public Made by Adomby adom
Microchip Tech I/O Expanders, UQFN-20-EP(4x4). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMCP23008T-E
Microchip Tech · I/O Expanders · UQFN-20-EP(4x4)
MCP23008T-E from Microchip Tech, in a UQFN-20-EP(4x4). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | A2 | input | Hardware address input; A2 must be biased externally. |
| 2 | A1 | input | Hardware address input; must be biased externally. |
| 3 | A0 | input | Hardware address input; must be biased externally. |
| 4 | RESET | input | External Reset input; must be biased externally. |
| 5 | NC | unconnected | No connect. |
| 6 | N/C | unconnected | No connect. |
| 7 | INT | output | Interrupt output; can be configured for active-high, active-low or open-drain. |
| 8 | N/C | unconnected | No connect. |
| 9 | GP0 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 10 | GP1 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 11 | GP2 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 12 | GP3 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 13 | GP4 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 14 | GP5 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 15 | GP6 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 16 | GP7 | bidirectional | Bidirectional I/O pin; can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
| 17 | VSS | power_in | Ground. |
| 18 | VDD | power_in | Power. |
| 19 | SCL | input | Serial clock input. |
| 20 | SDA | bidirectional | Serial data I/O. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | UQFN-20-EP(4x4) |
| Category | Interface |
| Pins | 21 |
CAD (KiCad official)
- Symbol:
MCP23008T-E - Footprint:
Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm - 3D model: UQFN-20-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
mcp23008t-e-etched.step/mcp23008t-e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp23008t-e.step/mcp23008t-e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (43 pp, sha256
3516fba5df6da78c, retrieved 2026-09-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).