CY8C9520A-24PVXIT

Overview

The CY8C9520A-24PVXIT is a 20-bit I/O expander with integrated EEPROM, operating on an I2C interface. It features four independently configurable 8-bit PWM outputs and supports up to 128 devices on a single bus via extendable soft addressing. The device operates within a supply voltage range of 3 V to 5.25 V and includes internal power-on reset and a configurable watchdog timer. It provides interrupt output capabilities for input changes and PWM state updates.

Feature Summary

• Configurable I/O pins support multiple drive modes including open drain, strong drive, and resistive pull-up/down.
• Integrated EEPROM allows storage of user default settings that restore automatically upon power-up.
• Extendable soft addressing algorithm enables flexible I2C address configuration using available GPIO pins.

Applications

• Monitoring and controlling board-level devices such as LEDs.
• System intrusion detection applications.
• Storing error codes or manufacturing data in onboard EEPROM for diagnostic read-back.

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube. Confirm the manufacturer documentation aligns with Infineon Technologies specifications. Ensure the component meets required environmental standards before integration into final designs.

Selection Notes

Select this model when 20 general-purpose I/O lines are sufficient. Choose over CY8C9540A or CY8C9560A if fewer ports are needed. Verify I2C master compatibility regarding clock stretching requirements. Check package availability against design constraints.

Part Context

This component belongs to the CY8C95xxA family of multi-port I/O expanders. It shares architectural similarities with the CY8C9540A and CY8C9560A but differs in pin count and PWM sources. All devices in the series operate identically regarding register mapping and control logic.

Replacement Considerations

CY8C9520A-24PVXI serves as the tube-packaged equivalent. CY8C9540A and CY8C9560A offer higher I/O counts but maintain software compatibility. No direct cross-brand replacements are documented in the provided datasheet.