{"product_id":"gpio-expander-pcal6416ahf","title":"GPIO Expander PCAL6416A Breakout","description":"\u003cp\u003e\u003cstrong\u003eGPIO Expander PCAL6416A Breakout\u003c\/strong\u003e is built around NXP's \u003cstrong\u003ePCAL6416A\u003c\/strong\u003e, a 16-bit I2C GPIO expander that adds 16 programmable input\/output pins to a microcontroller over two I2C wires. The 16 pins are split into two 8-bit ports, Port A and Port B, and each pin supports an individually configurable 100 kOhm pull-up or pull-down resistor along with input latching. A soldered Arduino library is available for reading and writing the expanded pins.\u003c\/p\u003e\n\n\u003cp\u003eIt's a common choice when a microcontroller runs out of GPIO pins: reading a bank of buttons or switches, driving a set of LEDs or relays directly, or building a keypad matrix, all through the same two I2C wires you may already be using for other Qwiic boards.\u003c\/p\u003e\n\n\u003cp\u003eThe board communicates over I2C in both standard mode (100 kHz) and fast mode (400 kHz), at a default address of 0x20 that can be changed to 0x21 by cutting the JP3. An active-low interrupt output on the INT pin notifies the host microcontroller whenever an input changes state, removing the need to poll every pin individually. It includes a \u003cstrong\u003eQwiic connector\u003c\/strong\u003e for solderless wiring alongside the standard pin headers.\u003c\/p\u003e\n\n\u003cp\u003eEach output pin can sink up to 25 mA, enough to drive an LED directly. Typical supply current is 1.1 mA, with a maximum of 1.5 mA. Onboard jumpers select between 5V and 3.3V I2C pull-ups and can bypass the onboard voltage regulator when needed. The board measures 22 x 38 mm, with two mounting holes sized for M3 screws.\u003c\/p\u003e","brand":"Soldered Electronics","offers":[{"title":"Default Title","offer_id":65125290180957,"sku":"333180","price":0.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/5029\/1549\/files\/PCAL6416A_Pinout.png?v=1783342445","url":"https:\/\/soldered.com\/products\/gpio-expander-pcal6416ahf","provider":"Soldered Electronics","version":"1.0","type":"link"}