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Green rectangular PCB with MCP23017 chip, PH2.0 header and solder pads

KEHIPI

KEHIPI MCP23017 IO Expansion Board development board 16 I/O pins

SKU CH-3501-B7Z1X

I2C-controlled board adds 16 configurable I/O pins with dual PH2.0 and solder-pad connectors for stackable expansion, plus onboard voltage translation for 3.3V and 5V logic levels

  • I2C control adds 16 I/O pins from just 2 signals
  • Configurable I2C address via A0/A1/A2 jumpers
  • PH2.0 terminal and solder pads enable module stacking
  • Onboard voltage translator supports 3.3V and 5V logic levels
  • MCP23017 chip provides 16 bidirectional I/O ports

16-Channel I/O Expansion Board for Microcontroller

This KEHIPI MCP23017 board adds sixteen general-purpose input and output pins to any microcontroller using only a two-wire I2C bus. It targets hobbyists, students and embedded engineers who need extra GPIO for sensors, relays or LEDs without upgrading to a larger processor. The compact module suits breadboard prototyping as well as permanent installations.

I2C Address Selection via A0/A1/A2 Jumpers

Three onboard jumpers let you set the device address so up to eight boards can share the same bus without conflict. This single hardware setting decides whether the board fits into an existing multi-device I2C chain or requires a separate bus master. No software library can change the address once the jumpers are soldered or left open.

Dual PH2.0 and Solder-Pad Connectors Enable Stacking

The board provides both a PH2.0 terminal header and through-hole solder pads, allowing modules to be stacked vertically or wired into a custom harness. An onboard voltage translator makes the I/O pins safe for 3.3 V and 5 V logic levels, so the same board works with either supply rail without external level shifters.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 91% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameWaveshare
Model nameMCP23017 IO Expansion Board
Part numberMCP23017 IO Expansion Board

Questions about this item

What does expanding 2 signal pins to 16 I/O pins mean for my project?

The MCP23017 adds sixteen programmable inputs or outputs while using only two host pins, freeing the rest of the microcontroller for other tasks.

How does the I2C interface limit the expansion speed?

I2C runs on two wires shared by all stacked modules, so total bandwidth is divided among them and each read or write adds protocol overhead.

What spacing do the PH2.0 terminals require on my board?

The PH2.0 connectors use a 2.0 mm pitch, matching standard PH2.0 headers for plug-in wiring or stacking.

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