MCP23017/MCP23S17
16-Bit I/O Expander with Serial Interface
Features
• 16-Bit Remote Bidirectional I/O Port:
- I/O pins default to input
• High-Speed I2C Interface (MCP23017):
- 100 kHz
- 400 kHz
- 1.7 MHz
• High-Speed SPI Interface (MCP23S17):
- 10 MHz (maximum)
• Three Hardware Address Pins to Allow Up to
Eight Devices On the Bus
• Configurable Interrupt Output Pins:
- Configurable as active-high, active-low or
open-drain
• INTA and INTB Can Be Configured to Operate
Independently or Together
Package Types
MCP23017
GPB0
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VDD
VSS
NC
SCK
SDA
NC
•1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
GPA7
GPA6
GPA5
GPA4
GPA3
GPA2
GPA1
GPA0
INTA
INTB
RESET
A2
A1
A0
SOIC
SPDIP
SSOP
• Configurable Interrupt Source:
- Interrupt-on-change from configured register
defaults or pin changes
• Polarity Inversion Register to Configure the
Polarity of the Input Port Data
• External Reset Input
• Low Standby Current: 1 µA (max.)
• Operating Voltage:
- 1.8V to 5.5V @ -40°C to +85°C
- 2.7V to 5.5V @ -40°C to +85°C
- 4.5V to 5.5V @ -40°C to +125°C
Packages
• 28-pin QFN, 6 x 6 mm Body
• 28-pin SOIC, Wide, 7.50 mm Body
• 28-pin SPDIP, 300 mil Body
• 28-pin SSOP, 5.30 mm Body
GPB0
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VDD
VSS
CS
SCK
SI
SO
MCP23S17
• 1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
GPA7
GPA6
GPA5
GPA4
GPA3
GPA2
GPA1
GPA0
INTA
INTB
RESET
A2
A1
A0
GPB4
GPB5
GPB6
GPB7
VDD
VSS
NC
28 2726 2524 2322
1 21
2 20
3 19
4
5
EP
29 *
18
17
6 16
7 15
8 9 1011121314
GPA4
GPA3
GPA2
GPA1
GPA0
INTA
INTB
QFN
GPB4
GPB5
GPB6
GPB7
VDD
VSS
CS
28 272625242322
1 21
2 20
3 19
4
5
EP
29 *
18
17
6 16
7 15
8 9 10 11121314
GPA4
GPA3
GPA2
GPA1
GPA0
INTA
INTB
* Includes Exposed Thermal Pad; see Table 2-1.
2005-2016 Microchip Technology Inc.
DS20001952C-page 1
