CY7C68301C-56LFXC - USB 2.0 ATA Bridge | Cypress Semiconductor
MPN: CY7C68301C-56LFXC ✗ End of LifeCY7C68301C-56LFXC Overview
A USB-to-ATA bridge is an interface controller that translates USB transactions into ATA commands and transfers data between a USB host and an ATA-compatible storage device. Within the interface-controller hierarchy, this device belongs to the USB high-speed peripheral-controller class and bridges USB connectivity with the ATA storage ecosystem. The bridge can therefore be used in storage peripherals, adapters, embedded systems, and legacy-device modernization designs.
The principal identified characteristics are USB 2.0 high-speed operation, a USB-to-ATA/ATAPI bridge function, and a compact 56-VFQFN package with an exposed pad. Its surface-mount package supports high-density PCB layouts while providing a thermal and electrical connection between the device and the board. The exposed-pad construction requires careful PCB layout and thermal management to achieve reliable operation without excessive junction temperature.
This controller is associated with the EZ-USB AT2LP family of USB-to-ATA solutions. Its position between the USB host and an ATA device means that system designers must account for USB enumeration, ATA signaling, storage timing, power management, and connector requirements. The device is therefore more specialized than a general-purpose USB hub or serial interface controller: it is intended specifically for bridging USB connectivity to ATA or ATAPI storage functions.
Typical applications include USB external-storage enclosures, USB-to-ATA storage adapters, embedded data-storage systems, industrial equipment with legacy ATA peripherals, and compact industrial or retrofitted storage products. In these applications, the CY7C68301C-56LFXC centralizes protocol translation while allowing the storage subsystem to retain the ATA command and electrical architecture used by legacy devices.
For PCB implementation, follow the manufacturer's pin-assignment and reference-layout guidance exactly. Place the exposed pad on a continuous ground plane, connect USB and ATA differential pairs with controlled impedance and matched routing, and provide local decoupling at the supply pins. Keep high-current and high-speed routing areas separated where practical, and verify the complete interface with USB compliance, signal-integrity, and power-integrity testing.
This product summary combines the device identity, USB-to-ATA function, package information, sourcing context, and practical PCB guidance. It also distinguishes the identified same-package family references so engineers can evaluate migration options while checking device revisions, electrical ratings, firmware requirements, and pin-level compatibility before making a replacement.
Drop-in alternatives for CY7C68301C-56LFXC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY7C68301C-56LFXC (same form factor and footprint) — differing in Package Type, Product Type, Operating Supply Voltage, Operating Temperature Range.
CY7C68301C-56LTXC
✅ Drop-InContact for price
View Datasheet →CY7C68300C-56LFXC
✅ Drop-InContact for price
View Datasheet →CY7C68300B-56LFXC
✅ Drop-InContact for price
View Datasheet →CY7C68320C-56LFXC
✅ Drop-InContact for price
View Datasheet →CY7C68301C-56LFXC Specifications
| Product Type | USB 2.0 to ATA/ATAPI bridge controller |
| USB Version | USB 2.0 |
| USB Interface Class | USB high-speed peripheral |
| Storage Interface | ATA/ATAPI |
| Protocol Conversion | USB 2.0 to ATA/ATAPI |
| Package Type | 56-pin VFQFN |
| Package Body Size | 8 x 8 mm |
| Exposed Pad | Present |
| Mounting Type | Surface mount |
| Product Family | EZ-USB AT2LP |
| Manufacturer | Cypress Semiconductor Corp |
| Number of I/O Pins | 56 pins |
CY7C68301C-56LFXC 8 x 8 mm Pin Configuration Guide
Pin configuration for CY7C68301C-56LFXC (8 x 8 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for CY7C68301C-56LFXC.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C68301C-56LFXC is suitable for 6 applications: USB External Storage Enclosures, USB-to-ATA Storage Adapters, Embedded ATA Data Storage, Industrial Legacy Storage Retrofit, Portable Data Transfer Device, Test and Measurement Data Export.
USB External Storage Enclosures
The CY7C68301C-56LFXC fits a USB external-storage enclosure that needs to expose an ATA or ATAPI disk through a USB 2.0 host connection. The controller handles the bridge function between the USB high-speed peripheral interface and the ATA storage side, allowing the enclosure to present a conventional removable or fixed-disk interface to a computer. Its 56-VFQFN package keeps the controller compact, but the exposed pad and high-speed differential routing require careful layout. The design should verify the exact ATA device family, connector standard, power source, and USB enumeration behavior against the manufacturer documentation.
Recommended
USB-to-ATA Storage Adapters
The CY7C68301C-56LFXC is appropriate for a compact adapter that connects a legacy ATA or ATAPI storage device to a USB 2.0 host. Its dedicated USB-to-ATA bridge function avoids implementing storage command translation in an external microcontroller or host. The compact 56-VFQFN package supports space-constrained adapters, while the exposed pad helps conduct heat through the PCB. A production adapter must account for USB power limits, cable and connector behavior, ATA cable timing, inrush current, device initialization, and operating-system compatibility with the resulting logical drive.
Recommended
Embedded ATA Data Storage
The CY7C68301C-56LFXC can bridge an embedded ATA storage subsystem to a USB 2.0 interface for configuration transfer, diagnostics, logging, or data extraction. Its ATA/ATAPI orientation makes it useful when an embedded system retains an ATA-compatible storage architecture but must expose that data to a service computer or portable maintenance terminal. The bridge must be validated against the controller timing, device initialization sequence, power states, and supported commands. Board-level implementation should include controlled-impedance USB routing, uninterrupted ATA traces, local decoupling, and a ground-plane connection for the exposed pad.
Recommended
Industrial Legacy Storage Retrofit
The CY7C68301C-56LFXC is suitable for industrial modernization projects that retain an ATA-based data recorder while adding USB 2.0 service access. The controller can provide a bridge between an existing ATA peripheral and a maintenance host, reducing the need to redesign the legacy storage subsystem. For industrial deployment, engineers must confirm operating-temperature limits, EMC performance, power-loss behavior, and long-term supply status. The USB and ATA connectors should be isolated from noisy power stages, and the board should provide tested protection for externally accessible lines.
Recommended
Portable Data Transfer Device
The CY7C68301C-56LFXC can form the interface core of a portable device that transfers files between ATA/ATAPI media and a USB 2.0 host. Its dedicated bridge architecture simplifies the host-facing storage role, and the 56-VFQFN outline supports compact board construction. A portable implementation should budget energy carefully, provide stable storage and controller rails, and ensure that USB enumeration remains reliable across power states. Mechanical design must also allow adequate heat transfer from the exposed pad while keeping connectors and cable stress away from high-speed traces.
Recommended
Test and Measurement Data Export
The CY7C68301C-56LFXC can serve as a USB-to-ATA bridge in test and measurement equipment that records large data sets to an ATA-compatible medium and later exports them to a host computer. The USB 2.0 high-speed peripheral role is appropriate for moving data between instrumentation and a portable workstation, while the ATA side preserves compatibility with standard storage hardware. Validation should cover sustained-transfer behavior, device power requirements, cable limitations, and the host-side class or driver implementation. Separate the bridge from sensitive analog measurement sections and use controlled-impedance routing to preserve signal integrity.
Recommended
Recommended Products Summary
Engineering reference data for CY7C68301C-56LFXC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C68301C-56LTXC | CY7C68300C-56LFXC | CY7C68300B-56LFXC | CY7C68320C-56LFXC |
|---|---|---|---|---|---|
| Package | 56-VFQFN, 8 x 8 mm | 56-VFQFN | 56-VFQFN | 56-VFQFN | 56-VFQFN |
| Brand | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Function | USB 2.0 to ATA/ATAPI bridge | USB 2.0 to ATA/ATAPI bridge | USB 2.0 to ATA/ATAPI bridge | USB peripheral, low-power listing | USB high-speed peripheral interface |
| Pin Count | 56 pins | 56 pins | 56 pins | 56 pins | 56 pins |
| Product Family | EZ-USB AT2LP | EZ-USB AT2LP | CY7C68300C family | CY7C68300B family | CY7C68320C family |
| Surface-Mount Package | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Exact EZ-USB AT2LP family identity for existing CY7C68301C designs (vs CY7C68300C-56LFXC)
- Closest ordering-family reference within the identified bridge series (vs CY7C68301C-56LTXC)
- Specialized USB-to-ATA/ATAPI positioning rather than a generic USB peripheral (vs CY7C68320C-56LFXC)
- Compact 8 x 8 mm surface-mount integration (vs CY7C68300B-56LFXC)
Design Notes
Route the USB differential pair as a controlled-impedance pair and keep its geometry consistent through connectors, protection components, and the CY7C68301C-56LFXC pins. Match the ATA signal group to the requirements of the selected device and connector. Avoid adding test pads or routing discontinuities within the sensitive interface sections. Place interface protection close to externally accessible connectors, while keeping the return path continuous over the PCB ground plane.
The 56-VFQFN package includes an exposed pad that must be connected to the PCB land pattern and a low-impedance thermal plane. Use the manufacturer land-pattern dimensions and follow its soldering and assembly guidance for the exposed-pad footprint. Provide uninterrupted copper where practical, avoid thermal relief patterns that impede heat flow unless required by assembly practice, and evaluate junction temperature using the device-specific thermal model for the actual board and enclosure.
Design separate, adequately decoupled paths for the controller and USB transceiver supply requirements shown in the manufacturer datasheet. Place bulk and high-frequency decoupling capacitors at the relevant pins with short return paths, and account for ATA disk inrush current separately from the bridge controller's demand. Validate startup sequencing, brownout behavior, and power-loss recovery to prevent unintended storage writes or device lockups during rail transitions.
Do not infer drop-in compatibility solely from the shared 56-VFQFN outline. Compare every pin name, supply rail, clock source, configuration method, strap value, enable sequence, and exposed-pad requirement across the exact device revisions. Firmware and ATA-device support can also differ even when the USB bridge function is the same. Perform a schematic, timing, and software review before substituting a family member in an existing design.
Compliance Information
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified for this exact MPN. AEC-Q100 is not applicable because the target is an interface controller rather than an automotive-qualified power device.
