ADP5587ACPZ-R7

Overview

The ADP5587ACPZ-R7 is an I/O port expander and keypad matrix controller designed for mobile platforms requiring expanded GPIOs and large keypads. It operates on a supply voltage 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). It features an I2C interface with auto-increment, open-drain interrupt output, programmable pull-ups, and a 10-event FIFO buffer with overflow interrupt capability.

Feature Summary

• Configurable as either an 18-GPIO port expander or a 10 × 8 keypad matrix
• Integrated 10-key event FIFO buffer with overflow detection and interrupt
• Keypad lock capability with programmable unlock sequences and mask timers
• I2C interface with auto-increment feature to minimize processor intervention

Applications

• QWERTY type mobile phones requiring large keypad matrices
• Portable devices needing expanded general-purpose I/O lines
• Mobile platforms where main processor GPIO availability is limited

Procurement Notes

Verify the specific package variant against the datasheet ordering guide, as the ADP5587 family includes both LFCSP and WLCSP options. Confirm that the required I2C address configuration matches the available pin strapping options for the selected package to ensure bus compatibility in multi-device designs.

Selection Notes

Select this component when a design requires simultaneous support for extensive key scanning and additional general-purpose inputs or outputs. Ensure the system power rail falls within the 1.65 V to 3.6 V operating range and that the I2C bus timing specifications align with the host processor's capabilities.

Part Context

The ADP5587 is part of Analog Devices' portfolio of interface ICs focused on input/output expansion. It addresses the constraint of limited GPIOs on main processors in compact mobile devices by offloading keypad scanning and I/O management tasks, thereby reducing processor load and system power consumption.

Replacement Considerations

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