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Infineon Technologies CY7C68000-56LFXC
- Part No.:
- CY7C68000-56LFXC
- Manufacturer:
- Infineon Technologies
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C68000-56LFXC.pdf
- Description:
- IC TRANSCEIVER FULL 1/1 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,620
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Product details
Overview
CY7C68000-56LFXC from Cypress Semiconductor is a USB 2.0 UTMI-compliant transceiver IC that implements the physical layer (PHY) for high-speed (480 Mbps) and full-speed (12 Mbps) USB device operation. It provides serial-to-parallel conversion via an 8-bit/60-MHz or 16-bit/30-MHz parallel interface, integrates internal 1.5-kΩ DPLUS pull-up and USB line terminations, and operates from a single 3.3 V supply with an on-chip 24-MHz crystal oscillator interface - used in DSL modems and memory card readers.
For engineers reviewing the CY7C68000-56LFXC datasheet, CY7C68000-56LFXC pinout, CY7C68000-56LFXC application, or CY7C68000-56LFXC equivalent, key selection criteria include UTMI v1.05 compliance, integrated analog termination, dual-speed mode control (XcvrSelect/TermSelect), synchronous LineState[1:0] output, and OpMode-selectable test modes including bit-stuffing disable.
Technical Context
The CY7C68000 implements a dual-mode USB 2.0 PHY with independent FS and HS transceiver paths selected by XcvrSelect and termination control via TermSelect. Its on-die 24-MHz oscillator drives a PLL generating 30 MHz (16-bit mode) or 60 MHz (8-bit mode) UTMI clock, synchronized to CLK output.
It performs real-time NRZI encoding/decoding, bit stuffing/unstuffing with error detection, EOP/SYNC generation/detection, and elastic buffering to absorb data rate variation. LineState[1:0] outputs mirror DMINUS/DPLUS states synchronously to CLK, enabling precise bus state monitoring in host-side glue logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Speed Modes | High Speed (480 Mbps) and Full Speed (12 Mbps); no Low Speed support. |
| UTMI Compliance | UTMI+ v1.05 specification compliant; certified for USB 2.0 device operation. |
| Parallel Interface | Configurable 8-bit @ 60 MHz or 16-bit @ 30 MHz bidirectional data bus. |
| Supply Voltage | 3.3 V ±10%; AVCC and VCC rails separately decoupled for analog/digital isolation. |
| Crystal Input | 24 MHz ±100 ppm parallel-resonant fundamental-mode crystal; internal oscillator circuit. |
| Integrated Termination | On-chip 1.5-kΩ DPLUS pull-up and USB differential line terminations; no external resistors required. |
| Operational Modes | OpMode[1:0] selects Normal (00), Non-driving (01), or Bit-Stuff/NRZI Disable (10). |
Pinout & Package
Package: 56-pin QFN (7 mm × 7 mm, 0.5 mm pitch) - RoHS-compliant, thermally enhanced, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D[15:0] | Bidirectional Data Bus | 16-bit parallel interface; D[7:0] active in 8-bit mode; ValidH controls upper byte validity in 16-bit mode. |
| CLK | Output Clock | Synchronous 30 MHz (16-bit) or 60 MHz (8-bit) clock for data capture; sourced from internal PLL. |
| XcvrSelect / TermSelect | Input Control Signals | XcvrSelect = 0 enables HS transceiver; TermSelect = 0 enables HS termination (SE0 assertion). |
| LineState[1:0] | Output Bus State Monitor | Synchronized combinatorial outputs reflecting DMINUS (LineState1) and DPLUS (LineState0) states per USB J/K/SE0 definitions. |
| XTALIN / XTALOUT | Clock Oscillator Interface | 24-MHz crystal connection points; supports external square-wave clock on XTALIN only. |
| Reset | Active-High Asynchronous Reset | Resets entire chip; internal PLL stabilizes ~200 µs after VCC reaches 3.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB Analog Front-End | Eliminates external 1.5-kΩ pull-up and D+/D− termination resistors, reducing BOM count and PCB area. |
| UTMI+ v1.05 Interface | Standardized parallel interface enables seamless integration with USB controller ASICs or FPGA-based SIEs without custom PHY glue logic. |
| Dynamic Speed Mode Switching | XcvrSelect and TermSelect pins allow runtime switching between FS and HS operation, supporting USB enumeration and speed negotiation. |
| Synchronous Line State Monitoring | LineState[1:0] outputs aligned to CLK enable deterministic bus state sampling in digital logic, critical for protocol analyzers and debug tools. |
| Test Mode Flexibility | OpMode[1:0] supports non-driving (soft disconnect) and NRZI/buffer bypass modes for USB compliance testing and signal integrity validation. |
Applications
| DSL Modem Interface | Memory Card Reader |
|---|---|
|
Use Scenario: High-bandwidth bridging between USB host and ADSL chipset using parallel FIFO interface. IC Role / Device Role / Timing Role: USB 2.0 PHY providing HS/FS signaling, clock recovery, and NRZI encoding for upstream data transmission. Use Value: Enables 480 Mbps aggregate throughput while offloading analog USB timing and impedance matching from the modem SoC. |
Use Scenario: Compact SD/microSD reader connecting to PC via USB 2.0 with minimal external components. IC Role / Device Role / Timing Role: Physical layer transceiver handling USB packet serialization, SYNC/EOP framing, and line-state detection. Use Value: Reduces bill-of-materials by integrating all USB termination and biasing, supporting Class 10 UHS-I card read speeds over USB. |
| Legacy Device Converter | USB Camera Module |
|
Use Scenario: Converting parallel ATA or IDE signals to USB 2.0 for legacy storage device connectivity. IC Role / Device Role / Timing Role: UTMI interface bridge converting burst-mode ATA transfers into USB token/data packets with elastic buffering. Use Value: Eliminates need for discrete USB PHY + controller combo; supports both 8-bit unidirectional and 16-bit bidirectional host-side interfaces. |
Use Scenario: Embedded camera subsystem transmitting MJPEG video streams to host PC at sustained 24–30 fps. IC Role / Device Role / Timing Role: High-speed USB PHY managing 480 Mbps data flow, clock recovery, and bit-stuffing compensation for variable-bitrate video payloads. Use Value: Maintains frame synchronization via RXValid/TXReady handshaking and LineState monitoring during hot-plug and suspend/resume transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 2.0 UTMI transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISP1504A (NXP) | Single 3.3 V supply; no integrated crystal oscillator - requires external 48 MHz clock or crystal. | Lacks on-chip 24-MHz oscillator and PLL; demands external clock source or separate oscillator circuit. | Select when system already provides 48 MHz reference or when lower analog power consumption is prioritized over integration. |
| USB3300 (Microchip) | Supports UTMI+ v1.05 and ULPI; includes integrated USB charger detection (BC1.2) and VBUS sensing. | Enables charging port functionality and VBUS monitoring not present in CY7C68000; adds pin count and complexity. | Select when USB battery charging compliance or VBUS-aware power management is required alongside transceiver operation. |
Compared with ISP1504A and USB3300, the CY7C68000-56LFXC offers highest integration for cost-sensitive USB 2.0 device PHYs with built-in oscillator and zero-external-resistor termination, but lacks BC1.2 or ULPI support needed for newer host-facing or charging-aware designs.
Availability
CY7C68000-56LFXC is available at Aetrix Electronics and suitable for DSL modems, memory card readers, and legacy conversion devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant QFN packaging.
Supply support for CY7C68000-56LFXC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Cypress Semiconductor (now part of Infineon Technologies) designs high-performance mixed-signal ICs for USB, memory, PSoC, and programmable logic applications.
The EZ-USB TX2™ product line delivers fully integrated USB 2.0 PHYs targeting cost-sensitive, space-constrained USB peripheral designs where analog front-end integration reduces design risk and time-to-market.
FAQ
Does CY7C68000-56LFXC support Low-Speed (1.5 Mbps) USB operation?
No. The CY7C68000-56LFXC supports only Full Speed (12 Mbps) and High Speed (480 Mbps) USB 2.0 signaling modes. It explicitly excludes Low-Speed operation per its functional specification and block diagram - no LS transceiver path or related control logic is implemented.
What is the role of the DataBus16_8 and Uni_Bidi pins?
DataBus16_8 configures the parallel interface width: logic HIGH enables 16-bit/30-MHz mode; LOW enables 8-bit/60-MHz mode. Uni_Bidi, active HIGH only in 8-bit mode, switches D[0:7] between bidirectional (Uni_Bidi = 0) and unidirectional Rx/Tx split (Uni_Bidi = 1), altering data bus timing behavior.
Can CY7C68000-56LFXC operate without an external crystal?
No. The device requires a 24-MHz parallel-resonant fundamental-mode crystal connected between XTALIN and XTALOUT. While XTALIN accepts an external 24-MHz square wave, no internal RC oscillator or clock multiplier replaces the crystal requirement - PLL operation depends on this reference.
How does the CY7C68000 handle USB suspend/resume signaling?
It detects USB suspend via the Suspend input pin and enters low-power mode, shutting down non-essential blocks. Resume signaling is generated by driving the D+/D− lines per USB 2.0 spec; TermSelect must remain in FS mode during suspend to maintain DPLUS pull-up, ensuring upstream port recognizes resume handshake.
CY7C68000-56LFXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- CY7C
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Transceiver
- Protocol:
- USB 2.0
- Number of Drivers/Receivers:
- 1/1
- Duplex:
- Full
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-QFN (8x8)
CY7C68000-56LFXC FAQ
1.How can I place an order for CY7C68000-56LFXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C68000-56LFXC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY7C68000-56LFXC reliable?
The price and inventory of CY7C68000-56LFXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C68000-56LFXC is usually 5 days.
3.What payment methods are accepted for CY7C68000-56LFXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C68000-56LFXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C68000-56LFXC?
CY7C68000-56LFXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C68000-56LFXC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY7C68000-56LFXC?
For technical support, including CY7C68000-56LFXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C68000-56LFXC requirements.
6.How does Aetrix verify that CY7C68000-56LFXC is sourced from the original manufacturer or authorized distributors?
All CY7C68000-56LFXC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY7C68000-56LFXC meets industry standards.
7.What is the process for return or replacement of CY7C68000-56LFXC?
All CY7C68000-56LFXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C68000-56LFXC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY7C68000-56LFXC part is unused and in its original packaging.
Return procedure for CY7C68000-56LFXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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