Name: Adafruit MCP23017 I2C GPIO Expander Breakout
Brand: Adafruit

ADA5346 · AdafruitActive

Adafruit product #5346 — built on MCP23017. Interfaces: I2C.

Part number	ADA5346
Manufacturer	Adafruit
Category	Interface & Expansion › I/O Expanders & Multiplexers
Pins	42

Adafruit MCP23017 I2C GPIO Expander Breakout pinout

Pin	Name	Type
1	INTA	bidirectional
2	INTB	bidirectional
3	A0	bidirectional
4	A1	bidirectional
5	A2	bidirectional
6	GPB7	bidirectional
7	GPB6	bidirectional
8	GPB5	bidirectional
9	GPB4	bidirectional
10	GPB3	bidirectional
11	GPB2	bidirectional
12	GPB1	bidirectional
13	GPB0	bidirectional
14	GND	ground
15	GND	ground
16	GND	ground
17	GND	ground
18	GND	ground
19	GND	ground
20	GND	ground
21	GND	ground
22	GND	ground
23	GND	ground
24	GND	ground
25	GND	ground
26	GND	ground
27	GND	ground
28	GND	ground
29	GND	ground
30	VCC	power
31	GND	ground
32	SCL	bidirectional
33	SDA	bidirectional
34	RESET	bidirectional
35	GPA0	bidirectional
36	GPA1	bidirectional
37	GPA2	bidirectional
38	GPA3	bidirectional
39	GPA4	bidirectional
40	GPA5	bidirectional
41	GPA6	bidirectional
42	GPA7	bidirectional