component
MCP23017-E
Public Made by Adomby adom
Microchip Tech I/O Expanders, QFN-28-EP(6x6). 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
markdownMCP23017-E
Microchip Tech · I/O Expanders · QFN-28-EP(6x6)
MCP23017-E from Microchip Tech, in a QFN-28-EP(6x6). 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 | GPB4 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 2 | GPB5 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 3 | GPB6 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 4 | GPB7 | output | Output-only I/O pin for MCP23017; configurable with interrupt-on-change and weak pull-up resistor. |
| 5 | VDD | power_in | Positive power supply; 1.8V to 5.5V operating range. |
| 6 | VSS | power_in | Ground connection. |
| 7 | NC | unconnected | No connect for MCP23017. |
| 8 | SCK | input | Serial clock input for I2C interface. |
| 9 | SDA | bidirectional | Serial data I/O for I2C interface (MCP23017) with open-drain output capability. |
| 10 | NC | unconnected | No connect for MCP23017. |
| 11 | A0 | input | Hardware address pin; must be externally biased. |
| 12 | A1 | input | Hardware address pin; must be externally biased. |
| 13 | A2 | input | Hardware address pin; must be externally biased. |
| 14 | RESET | input | Hardware reset input; must be externally biased and asserted low for minimum 1 µs. |
| 15 | INTB | output | Interrupt output for PORTB; configurable as active-high, active-low, or open-drain. |
| 16 | INTA | output | Interrupt output for PORTA; configurable as active-high, active-low, or open-drain. |
| 17 | GPA0 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 18 | GPA1 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 19 | GPA2 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 20 | GPA3 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 21 | GPA4 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 22 | GPA5 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 23 | GPA6 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 24 | GPA7 | output | Output-only I/O pin for MCP23017; configurable with interrupt-on-change and weak pull-up resistor. |
| 25 | GPB0 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 26 | GPB1 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 27 | GPB2 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 28 | GPB3 | bidirectional | Bidirectional I/O pin with configurable interrupt-on-change and weak pull-up resistor. |
| 29 | EP | passive | Exposed thermal pad for heat dissipation; may be connected to VSS or left unconnected. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | QFN-28-EP(6x6) |
| Category | Interface |
| Pins | 29 |
CAD (KiCad official)
- Symbol:
MCP23017-E - Footprint:
Package_DFN_QFN:QFN-28-1EP_6x6mm_P0.65mm_EP4.8x4.8mm - 3D model: QFN-28-EP(6x6) (KiCad packages3D, STEP)
- 3D model files:
mcp23017-e-etched.step/mcp23017-e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp23017-e.step/mcp23017-e.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (40 pp, sha256
63cb5f2bec44434c, retrieved 2026-09-22, 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).