ADP5589ACBZ-00-R7

Overview

The ADP5589ACBZ-00-R7 is a 19-port I/O expander with an integrated keypad matrix decoder, programmable logic, reset generator, and PWM generator. It operates on a supply voltage of 1.65 V to 3.6 V and supports I2C communication at frequencies up to 1 MHz. The device features a 16-event FIFO for recording key presses, releases, GPI changes, and logic activity. It includes configurable pull-up (100 kΩ or 300 kΩ) and pull-down (300 kΩ) resistors, debounce filters, and open-drain interrupt outputs. The component is available in a 24-lead LFCSP package.

Feature Summary

• Integrated 16-element event FIFO for tracking key, GPI, and logic events without continuous processor monitoring
• Built-in keypad matrix decoder supporting configurations up to 11 columns by 8 rows with ghosting prevention logic
• Dual programmable logic blocks and dual reset generators for custom hardware control functions
• Configurable I/O structure with selectable internal pull-up/pull-down resistors and push-pull/open-drain output modes

Applications

• Portable devices requiring keypad entry and I/O expansion capabilities
• Remote controls and cameras needing reduced processor load for input scanning
• Healthcare, industrial, and instrumentation equipment utilizing front panel interface connectors

Procurement Notes

Verify the specific ordering suffix to confirm the feature set, as the ADP5589 series offers distinct options such as reset pass-through or pull-down configurations on special function pins. Ensure the selected variant matches the required hardware initialization behavior and pin default states for the target application design.

Selection Notes

Select the ADP5589ACBZ-00-R7 when the application requires all GPIOs pulled up by default. Consider alternative suffixes like -01-R7 if reset pass-through functionality is needed, or -02-R7 if pull-down resistors on special function pins are required. Confirm package availability, as the ACBZ variant utilizes WLCSP packaging while ACPZ uses LFCSP.

Part Context

The ADP5589 belongs to Analog Devices' family of I/O expanders designed to offload input scanning tasks from main processors. This specific model integrates keypad decoding and programmable logic to reduce board space and cost. It serves as a bridge between user interfaces and digital controllers in low-power portable systems.

Replacement Considerations

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