ADP5587ACPZ-1-R7

Overview

The ADP5587ACPZ-1-R7 is an I/O port expander and keypad matrix controller designed for mobile platforms requiring extensive input lines. It operates on a supply voltage range of 1.65 V to 3.6 V with typical idle current of 1 μA and polling current of 55 μA. The device supports up to 18 configurable GPIOs or a 10 × 8 keypad matrix (80 keys). Communication occurs via an I2C interface with a maximum clock frequency of 400 kHz. It features open-drain interrupt output, programmable pull-ups, and a 10-event FIFO buffer with overflow capability. The component is housed in a 24-lead LFCSP package.

Feature Summary

• Configurable as either an 18-GPIO port expander or a 10 × 8 keypad matrix
• Integrated key event tracking with FIFO buffer and overflow interrupt
• Keypad lock capability with programmable unlock sequences
• I2C interface with auto-increment functionality

Applications

• QWERTY type mobile phones requiring large keypad matrices
• Portable devices needing expanded general-purpose I/O lines
• Systems requiring low-power standby operation with keypad scanning

Procurement Notes

Verify the specific suffix 'R7' indicates reel packaging when ordering. Confirm the 'ACPZ' designation corresponds to the lead-free LFCSP package variant. Ensure the host system supports the required I2C voltage levels within the 1.65 V to 3.6 V operating range. Check for moisture sensitivity handling requirements during storage and assembly.

Selection Notes

Select this component when a single IC must handle both keypad scanning and additional GPIO expansion. Consider the 24-lead LFCSP package if board space allows for larger footprints compared to the WLCSP option. Verify that the available I2C addresses on the bus accommodate the specific address selection pins required for multiple device configurations.

Part Context

The ADP5587 belongs to Analog Devices' portfolio of interface I/O expanders. It is specifically engineered to offload keypad monitoring tasks from main processors in mobile handsets. The device integrates hardware debouncing and event counting to reduce software overhead and processor bandwidth consumption during user input operations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.