ADIADP5587ACPZ-1-R7
Overview
The ADP5587ACPZ-1-R7 is a versatile 18-I/O expander and keypad controller designed for systems requiring efficient human-machine interface management. It operates over a wide voltage range of 1.65V to 3.6V and features a dedicated key event counter with a FIFO buffer to offload processing from the host microcontroller. By handling keypad scanning and debouncing autonomously, it significantly reduces I2C traffic and CPU overhead.
Why Choose This Part
The device features a hardware-based key event counter and an overflow interrupt, ensuring no user inputs are missed even during high system latency. Its tiny 4x4mm LFCSP package and low 55uA active current (at 1.8V) provide a compact, power-efficient solution for dense PCB layouts.
Applications
Key Specifications
Getting Started
Integrate the device via the 400 kHz I2C interface and configure the programmable pull-ups for your specific matrix or GPIO requirements. Engineers should utilize the open-drain interrupt output to trigger the host MCU only when a key press or release event is detected in the internal buffer.
Also Consider
NXP Semiconductors
- A standard 16-bit I2C I/O expander if dedicated keypad scanning logic is not required.
