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Parameters:
Operating voltage：3.0V-5.5V
Drive chip：MCP23017
Number of IO: 16 (input, output, interruption)
Drive power supply: 25mA1
12C frequency: 100KHz, 400KHz, 1..7MHz
Working temperature: -40 Celsius -125 Celsius
Chip level: Industrial grade
Parallel multiple: Up to 8
Driver: 51 and Arduino
Module size: 65mm*19mm

Pin description
VCC: Power source input (3.0V-5.5V)
GND: Power negative electrode (0V)
SCL: 12C clock line (SCL connecting single chip IO pin or MCU 12C interface)
SDA: 12C data line (SDA connecting single chip IO pin or MCU 12C interface)
RST: Chip reduction (Low level effective, connecting MCU IO pin or unconnected)
ITA: GPIOA port interrupt output (Connect MCU IO pin, without connection when interruption)
ITB: GPIOB port interrupt output (Connect MCU IO pin, without connection when interruption)

Package Included:
1pcs NOYITO MCP23017-E/SS I2C Interface 16-Channel IO Expansion Module

40:Tefe,