CY7C68321C-100AXC

Controllers Overview

The CY7C68321C-100AXC is a fixed-function USB 2.0 to ATA/ATAPI bridge IC from the EZ-USB AT2LP family, manufactured by Infineon Technologies (formerly Cypress Semiconductor). It operates at High Speed (480 Mbps) or Full Speed (12 Mbps) and supports ATA/ATAPI-6 compliant mass storage devices. The device features a 4 KB FIFO buffer, supports PIO Modes 0, 3, and 4, Multiword DMA Mode 2, and UDMA Modes 2, 3, and 4. It includes an I2C interface for configuration via external EEPROM and supports HID interfaces or custom GPIOs. The component is housed in a 100-pin TQFP package and is designed for low-power 3.3V operation.

Controllers Feature Summary

• Fixed-function mass storage bridge requiring no firmware
• Supports both self-powered and USB bus-powered modes
• Compatible with native USB Mass Storage Class drivers
• Includes General Purpose Input/Output (GPIO) capabilities

Controllers Applications

• Battery powered portable USB hard drives
• Bus powered Compact Flash readers
• ATA/ATAPI master and slave configurations
• Digital Rights Management (DRM) compatible media players

Controllers Procurement Notes

Verify the manufacturer origin as Infineon Technologies, noting the historical transition from Cypress Semiconductor. Confirm the specific 100-pin TQFP package designation matches the -100AXC suffix. Ensure compliance with RoHS standards and check for any relevant Product Change Notices regarding pinout or electrical characteristics updates.

Controllers Selection Notes

Select this model for designs prioritizing battery life due to its suitability for battery-powered applications. It is appropriate for systems requiring HID functionality or custom GPIO controls. Ensure the design accommodates the 100-pin TQFP footprint and provides the necessary 24 MHz crystal oscillator circuitry for proper clocking.

Controllers Part Context

This component belongs to the EZ-USB AT2LP series, which serves as a cost-effective alternative to previous generations like the ISD-300A1 and EZ-USB AT2. Unlike the CY7C68300C/301C variants, the CY7C68321C does not offer backward compatibility with the CY7C68300A pinout but provides enhanced flexibility through additional GPIO pins and a larger package option.

Controllers Replacement Considerations

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