CY7C68300B-56LFXC - USB 2.0 to ATA Bridge | Infineon
N.º da peça: CY7C68300B-56LFXC ✓ AtivoCY7C68300B-56LFXC Visão geral
A USB-to-ATA bridge is an interface controller that translates transactions between a USB host and an ATA or ATAPI storage device. Within the interface-controller hierarchy, the CY7C68300B provides a fixed-function bridge rather than a software-programmable USB peripheral controller. It supports one USB port and one or two ATA/ATAPI devices, allowing portable storage, card-reader, and legacy embedded-storage designs to use a common USB connection.
Key features include full-speed and high-speed USB 2.0 operation, ATA and ATAPI interfacing, CompactFlash support, and a low-power designation. The bridge can place its ATA interface into a high-impedance state so that the ATA bus can be shared with another controller, such as an IEEE 1394 storage controller. The 56-QFN exposed-pad construction also supports compact PCB layouts while providing a thermal connection to the board.
The fixed-function architecture simplifies firmware and host-driver integration because the controller does not depend on a general-purpose microcontroller core. USB signaling is handled alongside ATA/ATAPI protocol conversion within one bridge controller. The 480 Mbps interface capability is suitable for external storage workloads, while the support for one or two ATA devices expands design flexibility for multi-drive peripherals.
Typical uses include USB desktop hard-drive enclosures, CompactFlash readers, dual-ATA storage appliances, industrial data-acquisition equipment, and legacy embedded systems that need a USB-to-ATA interface. In a desktop enclosure, the USB connector feeds the controller and the controller interfaces directly with the storage device’s ATA signals. A design requiring bus sharing can use the available Hi-Z behavior during alternate-controller operation.
A key design consideration is package footprint and exposed-pad layout. The 8 x 8 mm QFN requires a land pattern matching the 56-pin package, and the exposed thermal pad should be connected according to the manufacturer’s recommended land-pattern guidance. Keep USB and ATA routing away from sensitive analog sections, and observe the signal-integrity and decoupling practices shown in the manufacturer datasheet.
This page combines the verified device identity, USB and ATA interface capabilities, package information, drop-in alternatives, comparison data, and practical implementation guidance to support engineering selection, PCB design, sourcing, and legacy product maintenance.
Alternativas drop-in para CY7C68300B-56LFXC — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com CY7C68300B-56LFXC (mesmo formato e footprint) — diferindo em Package, Storage Interface, Device Type, Package Dimensions, Product Type.
CY7C68300C-56LFXC
✅ Drop-InConsulte o preço
Ver ficha técnica →CY7C68320-56LFXC
✅ Drop-InConsulte o preço
Ver ficha técnica →CY7C68302-56LFXC
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CY7C68300A-56LFXC
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CY7C68300B-56LFXC Especificações
| Product Type | USB 2.0 to ATA/ATAPI fixed-function bridge controller |
| USB Standard | USB 2.0 |
| Maximum USB Data Rate | 480 Mbps |
| Supported USB Speeds | Full Speed and High Speed |
| Tensão de alimentação | 3.3 V |
| ATA Interface Support | ATA and ATAPI |
| USB Port Count | 1 port |
| ATA or ATAPI Device Count | 1 or 2 devices |
| CompactFlash Support | Supported |
| ATA Bus High-Impedance Mode | Supported |
| Encapsulamento | 56-pin QFN with exposed pad |
| Package Dimensions | 8 x 8 mm |
| Tipo de montagem | Surface mount |
| Process Technology | CMOS |
| Power Class | Low-power USB peripheral |
| Total Pin Count | 56 pins |
Guia de Configuração de Pinos do CY7C68300B-56LFXC 8 x 8 mm
Configuração de pinos para CY7C68300B-56LFXC (pacote 8 x 8 mm). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para CY7C68300B-56LFXC.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
CY7C68300B-56LFXC é adequado para 6 aplicaçãos: USB External Storage Enclosures, CompactFlash Card Readers, Dual-ATA Storage Appliances, Shared ATA Bus Systems, Legacy Embedded Storage, Industrial USB Data Storage.
USB External Storage Enclosures
The CY7C68300B-56LFXC fits desktop hard-drive enclosures because it provides a fixed-function USB 2.0 interface to ATA or ATAPI storage while operating from 3.3 V. Place the controller between the USB connector and storage-device interface to handle protocol translation without requiring a programmable microcontroller. Its 480 Mbps high-speed capability makes it appropriate for legacy storage products where USB 2.0 compliance and an established ATA interface are required. The 56-QFN exposed-pad package also keeps the controller compact, although the PCB must implement the exact recommended land pattern and thermal-pad connection.
Recomendado
CompactFlash Card Readers
The CY7C68300B-56LFXC is suitable for CompactFlash readers because the Cypress Semiconductor controller explicitly supports CompactFlash alongside ATA and ATAPI. A single USB 2.0 connection can therefore provide a bridge between a host computer and removable CompactFlash storage. The device supports full-speed and high-speed USB operation at rates up to 480 Mbps, while its one-or-two-device ATA capability offers additional implementation flexibility. Card detection, insertion, and removal behavior should be implemented according to the manufacturer application circuit, including the recommended capacitance, pull, and signal-routing arrangements.
Recomendado
Dual-ATA Storage Appliances
The CY7C68300B-56LFXC can serve dual-ATA storage appliances because the bridge supports one or two ATA or ATAPI devices from one USB port. This topology can place multiple storage devices behind a single USB interface while avoiding the complexity of a software-programmable USB controller. The controller’s fixed-function behavior supports predictable integration into established USB storage firmware. Signal routing must preserve ATA timing separation, and any shared-bus implementation must use the documented high-impedance state correctly to prevent contention with another controller.
Recomendado
Shared ATA Bus Systems
The CY7C68300B-56LFXC is useful in systems that temporarily share an ATA bus between USB storage and another controller. Its high-impedance ATA interface allows the USB bridge to disengage while another controller, such as an IEEE 1394 storage controller, accesses the bus. The approach requires correct sequencing of the bridge enable and shared-bus states so that neither controller drives the interface while the other is active. Because this is a timing-sensitive application, reproduce the manufacturer’s arbitration and reference-circuit behavior rather than designing the high-impedance transition solely from general USB requirements.
Recomendado
Legacy Embedded Storage
The CY7C68300B-56LFXC is appropriate for legacy embedded products that retain ATA or ATAPI storage but need a USB 2.0 host connection. Its fixed-function EZ-USB AT2LP architecture simplifies the firmware burden compared with a programmable USB controller, while USB high-speed operation provides a path to 480 Mbps. The 3.3 V supply and 56-QFN package suit compact controller sections, but the footprint must match the exposed-pad layout exactly. For an established design, verify the target revision’s timing, power, and firmware compatibility before production use.
Recomendado
Industrial USB Data Storage
The CY7C68300B-56LFXC can support industrial USB storage peripherals that use ATA or ATAPI media and require a compact bridge controller. Its fixed-function USB 2.0 interface supports full-speed and high-speed operation at up to 480 Mbps, while one- or two-device support permits different storage arrangements. In an industrial enclosure, pay particular attention to ground-plane continuity, connector-to-controller trace geometry, exposed-pad thermal performance, and cable-routing separation. These implementation practices help preserve USB signal integrity while the ATA side communicates with legacy storage hardware under temperature and vibration conditions.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CY7C68300B-56LFXC — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | CY7C68300C-56LFXC | CY7C68320-56LFXC | CY7C68302-56LFXC | CY7C68300A-56LFXC |
|---|---|---|---|---|---|
| Package | 56-VFQFN with exposed pad | 56-VFQFN | 56-VFQFN | 56-VFQFN | 56-VFQFN |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Product Category | EZ-USB AT2LP USB 2.0 to ATA/ATAPI bridge | EZ-USB AT2LP USB 2.0 ATA bridge | EZ-USB AT2LP USB 2.0 ATA bridge | Advanced EZ-USB AT2LP USB 2.0 ATA bridge | Previous-generation EZ-USB AT2LP USB 2.0 ATA bridge |
| USB Standard | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 |
| Maximum USB Data Rate | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps | 480 Mbps |
| ATA Interface | ATA and ATAPI | ATA and ATAPI | ATA and ATAPI | ATA and ATAPI | ATA and ATAPI |
| Controller Generation | B revision | C revision | 20 series | 02 series with additional features | A revision |
Principais diferenciais
- Closest revision-level replacement option (vs CY7C68300C-56LFXC)
- Documented complete package-compatible replacement (vs CY7C68320-56LFXC)
- Broader feature set in the same package family (vs CY7C68302-56LFXC)
- Earlier-generation alternative for legacy compatibility (vs CY7C68300A-56LFXC)
Notas de projeto
Create the PCB footprint from the manufacturer’s 56-QFN exposed-pad drawing rather than a generic 56-pin QFN footprint. Confirm pad dimensions, exposed-pad geometry, solder-mask opening, and paste pattern against the package drawing. Place input and output decoupling capacitors close to their associated pins, and provide a low-impedance ground plane around the controller. The exposed pad should follow the recommended electrical and thermal treatment to avoid assembly voids and uneven heating.
Route USB D+ and D- as a short, length-matched pair on a continuous reference plane, with no branch stubs and minimal vias. Keep the ATA traces away from noisy power-switching nodes and use the manufacturer’s recommended termination and decoupling arrangement. Differential impedance and USB compliance should be verified with the final stack-up. Do not substitute a generic USB trace geometry because the controller also coordinates sensitive ATA signals at up to 480 Mbps.
The B, C, A, 68302, and 68320 order codes represent related controllers but are not automatically interchangeable in every firmware and electrical design. Before substitution, compare supply voltage, absolute maximum ratings, enable timing, ATA device count, CompactFlash behavior, high-impedance timing, and exposed-pad connections. For shared-bus products, sequence the ATA controller states carefully so the bridge never drives the bus while another controller is active.
Use the exposed thermal pad to reduce junction temperature and improve heat spreading into the PCB. Provide copper area under and around the package where the manufacturer layout permits, and use thermal vias only in accordance with the recommended land pattern. Monitor enclosure temperature because the USB connector, storage media, and bridge may share limited cooling space. Exact thermal resistance values and junction limits should be obtained from the manufacturer datasheet.
Informações de conformidade
The manufacturer material describes the controller as a CMOS USB peripheral bridge but does not provide specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements.
