CY8C9560A-24AXIT

Overview

The CY8C9560A-24AXIT is a multi-port I/O expander with integrated EEPROM, operating within a supply voltage range of 3 V to 5.25 V and supporting an industrial temperature range from -40 °C to +85 °C. It provides 60 configurable I/O pins and up to 16 independently programmable 8-bit PWM outputs. The device communicates via an I2C interface compatible with SMBus standards, featuring a maximum clock frequency of 100 kHz. It includes 27 Kb of internal EEPROM for user data storage and default configuration retention. The component utilizes a TQFP-100 package and incorporates ESD protection rated at 2 kV.

Feature Summary

• Supports flexible I2C addressing through an extendable soft addressing algorithm that allows unused address pins to function as general-purpose I/O.
• Features individually configurable drive modes for each pin, including open drain, strong drive, resistive pull-up/down, and high impedance states.
• Includes dedicated interrupt output functionality to signal input level changes or PWM state transitions to the system master.
• Provides hardware-level write protection for the EEPROM via a configurable Write Disable (WD) input pin.

Applications

• Monitoring and controlling board-level devices such as LEDs and intrusion detection systems.
• Storing error codes and manufacturing data in onboard EEPROM for application software diagnostics.
• Expanding GPIO capabilities in systems requiring multiple independent PWM sources.

Procurement Notes

Verify the specific ordering suffix against official Infineon documentation to confirm package type and tape/reel specifications. Ensure compatibility with the target PCB footprint and soldering profile requirements. Confirm RoHS compliance status and moisture sensitivity level prior to procurement to meet assembly standards.

Selection Notes

Select this component when a high density of configurable I/O lines and multiple PWM channels are required on a single bus. Consider the 27 Kb EEPROM capacity for applications needing persistent storage of port configurations or user data without external memory components.

Part Context

This part belongs to the CY8C95xxA family of I/O expanders, which also includes the CY8C9520A and CY8C9540A variants. These devices share identical operational architectures but differ in the number of available I/O pins, PWM sources, and EEPROM size. The CY8C9560A represents the highest capacity option within this specific series.

Replacement Considerations

CY8C9540A

FAQ

How does the Extendable Soft Addressing algorithm work?

The algorithm uses the A0 pin to determine if additional address pins are needed. If A0 is strongly pulled, it acts as the sole address bit. If weakly pulled, subsequent pins (A1-A6) are used sequentially until the desired address is set, allowing unused pins to serve as GPIO.

What is the function of the INT pin?

The INT pin is an active-high interrupt output that signals the system master when there are incoming data changes on configured input ports or when a PWM output state changes.

Can the EEPROM be disabled?

Yes, EEPROM operations can be blocked by setting the WD pin high or by configuring specific bits in the Enable register. Configuration registers can also disable EEPROM access entirely.