ADP5589ACBZ-02-R7

Overview

The ADP5589ACBZ-02-R7 is a keypad decoder and I/O expander from Analog Devices, housed in a 25-ball WLCSP package. It provides 19 configurable I/Os supporting keypad matrices up to 11 × 8. The device features a 16-element FIFO for event recording, dual programmable logic blocks, PWM generation, and clock division. It operates on a supply voltage range of 1.65 V to 3.6 V with an I2C interface supporting fast-mode plus up to 1 MHz. The component includes internal pull-up (100 kΩ or 300 kΩ) and pull-down (300 kΩ) resistors.

Feature Summary

• Integrated 16-event FIFO for tracking key presses, releases, GPI changes, and logic activity without continuous processor monitoring.
• Configurable I/O structure with selectable internal pull-up and pull-down resistors for flexible GPIO and keypad matrix applications.
• Built-in programmable logic blocks and reset generators to reduce external component count and board area.
• Supports keypad lock/unlock functionality to prevent unintended input during specific operational states.

Applications

• Portable devices requiring keypad entry and I/O expansion capabilities
• Remote controls and cameras needing efficient key scanning
• Healthcare and industrial instrumentation interfaces

Procurement Notes

Verify the ACBZ-02 suffix indicates pull-down configuration on special function pins as per the datasheet. Confirm the WLCSP-25 package type matches the design footprint. Ensure the I2C address and timing requirements align with the system bus specifications before finalizing procurement.

Selection Notes

Select this model when a 19-port expander with integrated keypad decoding is required. The ACBZ-02 variant is suitable if pull-down resistors on specific row/column pins are needed. Consider the WLCSP package size constraints and the 1.65 V to 3.6 V operating voltage range against the target application's power supply.

Part Context

This component belongs to the ADP5589 series, which offers various feature sets differentiated by default I/O configurations. The ACBZ-02 variant specifically configures pull-down resistors on special function pins like R0, R3, R4, C4, C6, and C9, distinguishing it from the -00 and -01 options.

Replacement Considerations

Check for ADP5589ACBZ-00-R7 or ADP5589ACBZ-01-R7 if different default I/O pull configurations are acceptable. Verify that any substitute maintains the 25-ball WLCSP footprint and supports the required I2C communication speeds.