ADP5587ACBZ-R7

Overview

The ADP5587ACBZ-R7 is an I/O port expander and keypad matrix controller manufactured by Analog Devices Inc. It operates within a supply voltage range of 1.65 V to 3.6 V and supports an I2C interface with a maximum clock frequency of 400 kHz. The device provides 18 configurable GPIOs, functioning as either an 18-port expander or a 10 × 8 keypad matrix (up to 80 keys). It features open-drain interrupt outputs, programmable pull-ups, and a key event counter with overflow handling. The component is housed in a 2 mm × 2 mm WLCSP-25 package and operates across a temperature range of -40°C to +85°C.

Feature Summary

• Configurable as an 18-GPIO port expander or a 10 × 8 column-row keypad matrix for QWERTY applications.
• Integrated key event tracking with FIFO registers and overflow interrupt capability to manage up to 10 unprocessed events.
• Supports keypad lock functionality with programmable unlock sequences and interrupt mask timers.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging and revision status. Confirm that the WLCSP-25 package variant matches the design requirements for the target application. Cross-reference the part number with official distributor catalogs to validate authenticity and current production status before finalizing procurement decisions.

Selection Notes

Select this component when a compact solution is required for interfacing large keypads or expanding I/O lines in battery-powered portable devices. Ensure the system design accommodates the 1.65 V to 3.6 V operating voltage range and utilizes an I2C-compatible host controller. Consider the 2 mm × 2 mm package dimensions for space-constrained PCB layouts.

Part Context

The ADP5587ACBZ-R7 belongs to the ADP5587 series of mobile I/O expanders and keypad controllers. It is designed to offload keypad scanning and decoding tasks from the main microprocessor, thereby reducing system current drain and increasing processor bandwidth. The series includes variants with different packages, such as LFCSP and WLCSP, to suit various form factors.

Replacement Considerations

The ADP5587ACPZ-R7 is a pin-compatible alternative featuring an LFCSP-24 package instead of the WLCSP-25 configuration. Verify footprint compatibility and thermal requirements when substituting between these package types.