CY7C68000-56LFXC - USB 2.0 Transceiver | Infineon
MPN: CY7C68000-56LFXC ✓ ActiveCY7C68000-56LFXC Overview
A USB 2.0 transceiver is an interface IC that converts between a serial USB differential signal and a parallel digital data path. Within the product hierarchy, it is a USB interface IC, an interface converter, and ultimately a semiconductor designed for data transfer. The relevant implementation level is the PHY-to-controller boundary, where transceiver signal integrity, clocking, data signaling, and parallel timing must be coordinated with the connected USB controller.
Family documentation identifies a 16-bit parallel interface operating at 30 MHz or an 8-bit parallel interface operating at 60 MHz. These two operating modes support different balances between parallel-bus width and interface clock rate. The part also provides separate USB transmit and receive paths, allowing a parallel USB controller to manage bidirectional traffic over one USB 2.0 device connection.
The CY7C68000 belongs to the Cypress EZ-USB TX2 transceiver family, a USB specification revision 2.0 product category. Its 56-QFN arrangement supports compact surface-mount layouts while exposing the parallel signals, power connections, control pins, and exposed thermal pad required for a complete USB transceiver implementation. The exposed-pad construction provides a thermal path into the PCB, making copper-plane design and solder-reflow process control important.
Typical uses include USB connectivity for industrial control equipment, test and measurement instruments, embedded processors, printers, storage systems, and other compact USB 2.0 peripherals. The parallel interface is especially useful when the system controller has spare parallel I/O but lacks a native USB PHY. A controller-side clock, FIFO, or data engine must still handle protocol behavior because the transceiver provides the physical signaling interface rather than the complete USB host or device controller.
For PCB implementation, place the transceiver close to the USB connector and route the differential pair as a short, continuous pair over a solid ground plane. Confirm the exposed-pad connection and thermal-via pattern in the manufacturer package documentation. Decoupling, clock-source tolerance, pull-up placement, and the required firmware or controller timing should be validated together before release.
This page combines verified manufacturer-family information, distributor availability, package data, and drop-in replacement research. It also adds package-specific design guidance, application fit analysis, and parameter-by-parameter comparisons intended to support faster engineering selection without replacing the manufacturer datasheet or schematic review.
Drop-in alternatives for CY7C68000-56LFXC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
CY7C68000A-56LFXC
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C68000A-56LTXC
✅ Drop-In📋 Reference alternative (not in catalog)
CY7C68000-56LFC
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY7C68000A-56LFC
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY7C68000A-56LFXCT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY7C68000-56LFXC Specifications
| Product Type | USB 2.0 transceiver |
| Transceiver Configuration | 1 transmit and 1 receive channel |
| USB Specification | USB 2.0 |
| Serial Interface | USB differential serial interface |
| Parallel Interface Width | 16 bits or 8 bits |
| Parallel Interface Clock, 16-Bit Mode | 30 MHz |
| Parallel Interface Clock, 8-Bit Mode | 60 MHz |
| Package | 56-QFN (8 mm x 8 mm) |
| Package Type | QFN with exposed pad |
| Mounting Type | Surface mount |
CY7C68000-56LFXC qfn with exposed pad Pin Configuration Guide
Pin configuration for CY7C68000-56LFXC (qfn with exposed pad 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 CY7C68000-56LFXC.
Refer to the datasheet for full pin configuration.
Typical Applications
CY7C68000-56LFXC is suitable for 6 applications: Industrial USB 2.0 Control Equipment, USB 2.0 Test and Measurement Instruments, Embedded USB-to-Parallel Controller Bridges, USB 2.0 Storage and Data Acquisition, USB-Connected Printers and Peripherals, USB 2.0 Network and Communications Gateways.
Industrial USB 2.0 Control Equipment
The CY7C68000-56LFXC suits an industrial controller that needs USB 2.0 connectivity but drives the interface through a parallel processor bus. Its one-transmit, one-receive configuration supports bidirectional USB communication, while the parallel path can operate as 16 bits at 30 MHz or eight bits at 60 MHz. This gives the designer a choice between bus width and clock rate rather than committing to a USB PHY embedded in the controller. In a compact 56-QFN footprint, the device also supports space-constrained control panels and machine-interface modules. The principal engineering trade-off is that protocol handling remains outside the transceiver, so the connected controller must provide correct FIFO timing, USB signaling control, and software support.
Recommended
USB 2.0 Test and Measurement Instruments
The CY7C68000-56LFXC can provide the USB physical interface for a measurement instrument whose main processor has parallel I/O but no native USB controller PHY. The one-channel transmit-and-receive arrangement is appropriate for transferring instrument data, commands, and status through a USB 2.0 connection. Its documented parallel options support 16-bit operation at 30 MHz or 8-bit operation at 60 MHz, allowing the interface architecture to be matched to the available bus and clock resources. The 56-QFN package also preserves board area for multi-channel measurement hardware. For reliable operation, the USB differential route must remain short and controlled, while the parallel timing, clock source, and command protocol should be verified at the system level rather than treated as functions of the transceiver alone.
Recommended
Embedded USB-to-Parallel Controller Bridges
The CY7C68000-56LFXC is well suited to an embedded bridge in which USB 2.0 serial data must be converted into a parallel processor-facing data path. The 16-bit mode at 30 MHz provides a wider transfer interface, while the 8-bit mode at 60 MHz can simplify connectivity to processors with narrower buses or faster available clocks. Its single transmit and receive path maps directly to a USB 2.0 device or host-facing interface when one such link is required. The 56-QFN package is useful in compact embedded systems, but the exposed pad must be connected according to the exact package drawing. Because this IC implements signaling rather than a complete USB protocol stack, the companion controller must handle enumeration, descriptors, endpoint scheduling, and data buffering.
Recommended
USB 2.0 Storage and Data Acquisition
The CY7C68000-56LFXC can bridge a USB 2.0 connection to a parallel data-acquisition or storage controller. At 16 bits and 30 MHz, the parallel side can carry a comparatively wide data stream, while the alternate eight-bit, 60 MHz mode supports systems organized around narrower processor data paths. The USB 2.0 specification level and single transmit/receive arrangement make the device suitable for one physical USB link in a compact peripheral. Designers should account for the fact that the transceiver does not provide endpoint buffering or storage-interface logic, so an FPGA, microcontroller, or dedicated storage controller must manage those functions. Physical USB routing, connector grounding, and the clocking architecture are especially important where data integrity and cable compatibility are priorities.
Recommended
USB-Connected Printers and Peripherals
The CY7C68000-56LFXC can serve as the USB interface for a printer or other data peripheral whose internal engine is controlled through a parallel bus. The device provides the USB 2.0 serial connection while presenting either a 16-bit, 30 MHz interface or an 8-bit, 60 MHz interface to the printer controller. That flexibility supports legacy parallel-engine architectures and allows the bus width to match the processor’s native resources. The small 56-QFN package is advantageous inside compact printer electronics, while the exposed pad makes careful PCB thermal design necessary. Since the transceiver does not implement USB descriptors, endpoint handling, or printer-language processing, those responsibilities must remain with the embedded controller. Firmware and electrical validation should include cable insertion, suspend, and repeated data-transfer scenarios.
Recommended
USB 2.0 Network and Communications Gateways
The CY7C68000-56LFXC is applicable to a communications gateway that exposes a legacy parallel system bus to a USB 2.0 host. Its separate transmit and receive channels support bidirectional data exchange, and the selectable 16-bit or 8-bit parallel modes allow the gateway to match different processor buses and clock arrangements. The compact 56-QFN package leaves more PCB area for communications or processing components than a larger connector-oriented implementation. However, signal integrity, clock tolerance, and firmware latency will determine practical gateway performance. The designer must ensure that USB suspend, resume, and enumeration behavior is integrated into the gateway controller and must validate the complete path from the host software through the parallel interface to the target equipment.
Recommended
Recommended Products Summary
Engineering reference data for CY7C68000-56LFXC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY7C68000A-56LFXC | CY7C68000A-56LTXC | CY7C68000-56LFC | CY7C68000A-56LFC | CY7C68000A-56LFXCT |
|---|---|---|---|---|---|---|
| Package | 56-QFN (8 mm x 8 mm) | 56-QFN (8 mm x 8 mm) - same | 56-QFN (8 mm x 8 mm) - same | 56-QFN (8 mm x 8 mm) - same | 56-QFN (8 mm x 8 mm) - same | 56-QFN (8 mm x 8 mm) - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Product Type | USB 2.0 transceiver | USB interface transceiver | EZ-USB TX2 transceiver | EZ-USB TX2 transceiver | EZ-USB TX2 transceiver | EZ-USB TX2 transceiver |
| USB Specification | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 | USB 2.0 |
| Transceiver Configuration | 1 transmit and 1 receive channel | 1 transceiver | 1 transceiver | 1 transceiver | 1 transceiver | 1 transceiver |
Key Differentiators
- Documented functional equivalence with a revised same-family ordering option (vs CY7C68000A-56LTXC)
- Flexible processor-facing data width and clock rate (vs CY7C68000A-56LFXC)
- Compact single-channel implementation (vs CY7C68000-56LFC)
Design Notes
Place the CY7C68000-56LFXC close to the USB connector and route D+ and D- as a short, balanced differential pair over a continuous ground plane. Avoid splitting the ground reference beneath the pair, and minimize stubs and test-point discontinuities. The supplied data does not include the complete controlled-impedance layout or USB connector pinout, so use the exact manufacturer reference layout and PCB stack-up guidance before release.
The verified package is a 56-QFN with an exposed pad. Follow the manufacturer package drawing for exposed-pad dimensions, solder-mask configuration, and thermal-via arrangement. Uneven or inadequate soldering can change both thermal performance and electrical contact to the pad. The supplied data contains no package-specific junction-to-ambient rating, so do not substitute a generic QFN thermal value when performing a board-level thermal assessment.
The CY7C68000-56LFXC implements the USB physical transceiver, not a complete USB host, device, endpoint controller, or protocol stack. Ensure the companion controller handles enumeration, descriptors, suspend and resume, endpoint scheduling, and data buffering. Also verify the parallel bus width, clock rate, control-pin levels, and required pull-ups against the exact datasheet before schematic capture.
Validate the transceiver’s required supply rails, sequencing, and decoupling with the connected USB controller and system power architecture. The verified data does not include operating-voltage limits, supply-current values, or capacitor requirements, so those values must come from the exact manufacturer datasheet. Do not infer USB 5 V tolerance, internal regulator behavior, or current limits from the family name or from another suffix variant.
Compliance Information
The supplied verified data does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance fields are therefore marked unknown rather than inferred from manufacturer identity.
