CY7C68321C-56LFXC - USB 2.0 to ATA Bridge | Infineon
Référence : CY7C68321C-56LFXC ✓ ActifCY7C68321C-56LFXC Présentation
A USB-to-ATA bridge is an interface controller that translates commands and data between a USB host and an ATA-compatible storage device. Within the broader hierarchy, it is a USB interface IC, peripheral controller, storage-interface bridge, and semiconductor. Its principal design role is to allow a USB-equipped computer or embedded system to communicate with an ATA or ATAPI peripheral without implementing the complete protocol conversion in system firmware or external logic.
Key features include support for CompactFlash and one ATA or ATAPI device, USB 2.0 operation, and a manufacturing-test mode accessible through the USB interface. The controller can place its ATA interface in a high-impedance state, allowing the ATA bus to be shared with another controller such as an IEEE-1394 controller. This bus-isolation capability is valuable in systems that need to transfer ownership of the storage bus between interfaces.
The 56-VQFN arrangement supports compact integration in storage adapters, dock equipment, portable media systems, and industrial data-acquisition products. Its surface-mount construction reduces board area compared with a larger leaded package, although exposed-pad thermal management and careful high-speed USB layout remain important. The C suffix identifies the specific ordered device configuration, while the 56 suffix identifies its 56-pin package configuration.
Typical applications include USB-to-CompactFlash readers, ATA storage adapters, industrial removable-media systems, manufacturing-test fixtures, and legacy equipment that adds a USB storage interface. In each case, the bridge consolidates protocol conversion in a dedicated controller and leaves the host software with a standard USB storage interface.
Designers should follow the manufacturer datasheet when assigning the 56-pin footprint, USB routing, ATA or ATAPI traces, power rails, decoupling capacitors, and exposed-pad connections. USB differential routing and the ATA interface require controlled impedance and short return paths, while adequate input and output bypassing helps prevent conducted noise from disturbing attached storage devices.
This page combines the documented bridge features, package information, compatible family references, comparison data, and practical integration guidance into a focused engineering resource for USB-to-ATA storage designs.
Alternatives de remplacement direct pour CY7C68321C-56LFXC — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec CY7C68321C-56LFXC (même facteur de forme et même empreinte) — différant par Package Dimensions, Device Type, Package Type, RoHS Status, Storage Interface.
CY7C68300C-56LFXC
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →CY7C68300C-56LTXC
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →CY7C68300B-56LFXC
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →CY7C68300A-56LFC
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY7C68015A-56LFXC
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →CY7C68321C-56LFXC Spécifications
| Product Type | USB 2.0 to ATA/ATAPI bridge controller |
| Architecture | EZ-USB AT2LP |
| USB Interface | USB 2.0 high-speed peripheral |
| Storage Interface | ATA/ATAPI |
| Supported Storage Device Count | 1 ATA/ATAPI device |
| CompactFlash Support | Supported |
| Manufacturing Test Interface | USB interface |
| ATA High-Impedance Mode | Supported |
| Shared ATA Bus Application | IEEE-1394 controller sharing |
| Package Type | 56-pin VQFN |
| Package Dimensions | 8 x 8 mm |
| Type de montage | Surface mount |
| Statut RoHS | RoHS compliant |
| Lead-Free Status | Lead free |
Guide de configuration des broches du CY7C68321C-56LFXC 8 x 8 mm
Configuration des broches du CY7C68321C-56LFXC (boîtier 8 x 8 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour CY7C68321C-56LFXC.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
CY7C68321C-56LFXC convient pour 6 applications: USB-to-CompactFlash Reader, Legacy ATA Storage Adapter, Industrial Removable-Media System, USB Manufacturing-Test Fixture, Shared ATA Bus Equipment, USB Storage Test and Validation Unit.
USB-to-CompactFlash Reader
The CY7C68321C-56LFXC fits a USB-to-CompactFlash reader because it combines a USB 2.0 high-speed peripheral interface with documented CompactFlash support in a surface-mount 56-VQFN. The controller can be placed between a USB receptacle and the storage connector, reducing host-side protocol handling to a standard USB mass-storage interface. Its documented support for one ATA or ATAPI device makes it appropriate for a single-card reader rather than a multi-slot hub. Designers should follow the manufacturer datasheet for ATA signal routing, card-detect behavior, power sequencing, and connector protection.
Recommandé
Legacy ATA Storage Adapter
The CY7C68321C-56LFXC is appropriate for an adapter that brings a legacy ATA or ATAPI drive to a modern USB host. Its EZ-USB AT2LP architecture performs the USB-to-ATA protocol conversion, while the 56-VQFN package limits board footprint in compact external enclosures. The manufacturer documentation identifies support for one ATA/ATAPI device, so the adapter should use a single-drive topology. Firmware, drive compatibility, power requirements, and the transition between USB suspend and ATA power states must be validated before release.
Recommandé
Industrial Removable-Media System
The CY7C68321C-56LFXC can serve an industrial removable-media controller that exchanges data between a USB-capable host and ATA-compatible storage. Its USB 2.0 high-speed interface, single-device ATA support, and 56-VQFN construction suit compact embedded equipment. The manufacturing-test capability can streamline production access to the bridge through USB, reducing the need for a separate fixture interface. Industrial qualification still depends on the complete assembly’s environmental, EMC, power, and enclosure requirements rather than the controller alone.
Recommandé
USB Manufacturing-Test Fixture
The CY7C68321C-56LFXC supports board-level manufacturing testing through its USB interface, making it useful in fixtures that need to exercise an attached ATA device and its USB path without probing every bus signal. A production fixture can use the bridge to verify command exchange and detect basic storage-interface failures. The benefit is faster fault isolation when a board contains an embedded ATA controller behind the bridge. Test limits, timing, firmware revisions, and fixture sequencing must follow the manufacturer’s validation procedure.
Recommandé
Shared ATA Bus Equipment
The CY7C68321C-56LFXC is suitable for equipment in which the ATA bus may be shared with another controller, such as an IEEE-1394 interface. Its high-impedance ATA mode allows the bridge to release the bus while the alternative controller becomes active, reducing the risk of output contention. This architecture can support transitional storage systems that need both USB and another legacy bus. Signal ownership, turnaround timing, connector isolation, and power-state coordination must be designed from the manufacturer’s application guidance.
Recommandé
USB Storage Test and Validation Unit
The CY7C68321C-56LFXC can form the core of a USB storage validation unit that checks communication between a USB host and ATA or ATAPI hardware. The integrated USB interface gives the tester a direct path to the bridge, while the documented manufacturing-test support supports production diagnostics. This configuration is useful for board bring-up, firmware regression, and storage interoperability testing. Test scripts must account for the supported single-device topology, ATA command behavior, media type, and any firmware-specific requirements.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CY7C68321C-56LFXC — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CY7C68300C-56LFXC | CY7C68300C-56LTXC | CY7C68300B-56LFXC | CY7C68300A-56LFC | CY7C68015A-56LFXC |
|---|---|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | 56-VQFN (8 x 8 mm) | 56-VQFN (8 x 8 mm) | 56-VQFN (8 x 8 mm) | 56-VQFN (8 x 8 mm) | 56-VQFN (8 x 8 mm) | 56-VQFN (8 x 8 mm) |
Principaux différenciateurs
- Single-device ATA bridge with documented shared-bus control (vs CY7C68300B-56LFXC)
- Integrated USB manufacturing-test path (vs CY7C68300A-56LFC)
- CompactFlash and ATA support in one 56-VQFN bridge (vs CY7C68015A-56LFXC)
Notes de conception
Route the USB high-speed differential pair as a controlled-impedance, tightly coupled pair with a continuous reference plane and minimal layer changes. Keep the ATA/ATAPI traces short, provide solid ground-plane return paths, and separate switching or power-conversion nodes from sensitive USB routing. Use the manufacturer pin-description table and recommended-layout figures to establish connector, controller, decoupling, and exposed-pad placement before fabrication.
Design the USB and ATA power rails so each attached storage device receives the voltage and current required by its specification. Place the manufacturer-recommended input, output, and bypass capacitors close to their associated controller pins, while accounting for capacitor tolerance and DC-bias derating. Avoid sharing long supply paths between the USB connector and ATA load because inrush and cable-attachment transients can disturb bridge operation and host enumeration.
Connect the 56-VQFN exposed pad to the recommended ground-copper arrangement and follow the manufacturer’s maximum power, junction-temperature, and board-layout requirements. Estimated: total dissipated power equals controller supply voltage times device current plus any power dissipated by the bridge internally; actual junction temperature also depends on board area, copper, airflow, and adjacent heat sources. Validate the assembled board at the highest expected ambient temperature and storage-bus activity.
Do not assume that a 56-VQFN family member is automatically a drop-in replacement. Compare pin names, ATA signal directions, power pins, exposed-pad connections, USB device class, supported media, electrical timing, and firmware behavior. The high-impedance ATA mode also requires deliberate bus ownership and transition control; leaving two controllers driving the same ATA lines can cause contention. Complete hardware and firmware validation on the target board before production.
Informations de conformité
The product listing identifies the device as RoHS compliant and lead free. No separate AEC-Q100, REACH, halogen-free, or conflict-minerals qualification is established for this specific configuration.
