CY7C68321C-56LFXC

Controllers Overview

The CY7C68321C-56LFXC is a fixed-function USB 2.0 to ATA/ATAPI bridge IC from the EZ-USB AT2LP family, manufactured by Infineon Technologies (formerly Cypress). It provides a hardware-based interface between a USB host and one or two ATA/ATAPI mass storage devices without requiring firmware. The device supports High Speed (480 Mbps) and Full Speed (12 Mbps) USB protocols and complies with the Mass Storage Class Bulk-Only Transport specification. It operates on a single 3.3V power supply and utilizes an external serial EEPROM for configuration data storage.

Controllers Feature Summary

• Fixed-function architecture eliminates the need for custom firmware development
• Supports both self-powered and bus-powered operational modes
• Compatible with standard USB Mass Storage Class drivers
• Includes GPIO pins for custom features like button controls

Controllers Applications

• Bus-powered Compact Flash readers
• Portable USB hard drive enclosures
• ATA/ATAPI to USB bridge modules
• Digital rights management compatible media players

Controllers Procurement Notes

Verify component authenticity through authorized distributors. Confirm package type matches the 56-pin QFN requirement. Check RoHS compliance status against current environmental regulations. Ensure the specific suffix corresponds to the lead-free variant if required by assembly processes.

Controllers Selection Notes

Select this model for designs prioritizing low power consumption in battery-operated applications. The CY7C68321C variant is specifically optimized for battery-powered designs compared to the CY7C68320C. Ensure the design includes a 24 MHz crystal oscillator and an I2C EEPROM for proper initialization.

Controllers Part Context

This component belongs to the EZ-USB AT2LP series, succeeding earlier models like the CY7C68300A. It offers pin compatibility options for legacy designs while providing enhanced power efficiency. The CY7C68321C specifically targets portable applications requiring reduced power draw during operation and suspend states.

Controllers Replacement Considerations

The CY7C68320C-56LFXC is a functional alternative within the same family, though it is optimized for self-powered designs rather than battery-powered ones. Verify GPIO pin configurations and power mode requirements when substituting.