ADP5589ACPZ-02-R7

Overview

The ADP5589ACPZ-02-R7 is a 19-port I/O expander and keypad decoder manufactured by Analog Devices. It operates within a supply voltage range of 1.65 V to 3.6 V and supports I2C communication at frequencies up to 1 MHz. The device features an internal 16-element FIFO for event recording, configurable pull-up (100 kΩ or 300 kΩ) and pull-down (300 kΩ) resistors, and dual programmable logic blocks. It includes PWM generation capabilities and two reset generators. The component is housed in a 24-lead LFCSP package measuring 3.5 mm × 3.5 mm.

Feature Summary

• Integrated keypad matrix decoding supporting up to 11 columns by 8 rows with ghosting prevention logic.
• Built-in 16-event FIFO buffer that records key press/release, GPI changes, and logic activity events.
• Configurable I/O structure with selectable internal pull-up and pull-down resistors for flexible interface design.
• Dual programmable logic blocks and PWM generator for integrating common logic functions directly on the chip.

Applications

• Portable devices requiring keypad entry and I/O expansion, such as mobile phones and remote controls.
• Camera systems needing dedicated input handling and GPIO management.
• Healthcare equipment and industrial instrumentation interfaces.

Procurement Notes

Verify the specific ordering suffix -02-R7 against the manufacturer's current datasheet to confirm the presence of pull-down resistors on special function pins. Ensure compatibility with the required LFCSP-24 footprint and check for any recent revision updates that may affect register maps or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a system requires extensive keypad scanning combined with general-purpose I/O expansion. The built-in FIFO reduces processor overhead by handling event tracking autonomously. Consider the -02 variant specifically if pull-down functionality on row/column pins is necessary for the application's electrical requirements.

Part Context

This part belongs to the ADP5589 series of I/O expanders from Analog Devices. It is designed to offload input processing tasks from the main microcontroller. Other variants in the series include options with different default pull configurations or reset pass-through features, allowing designers to choose based on specific board layout and power management needs.

Replacement Considerations

Direct substitutes within the same family include the ADP5589ACPZ-00-R7 and ADP5589ACPZ-01-R7. Note that these alternatives differ in their default I/O pull configurations or reset behavior; verify that the functional differences do not impact the circuit design before substitution.