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Infineon Technologies CY7C68320C-56PVXC
- Part No.:
- CY7C68320C-56PVXC
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY7C68320C-56PVXC.pdf
- Description:
- IC USB 2.0 BRIDGE AT2LP 56-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,917
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Product details
Overview
CY7C68320C-56PVXC from Cypress Semiconductor is a fixed-function USB 2.0 to ATA/ATAPI-6 bridge IC enabling mass storage connectivity without firmware development. It supports high-speed (480 Mbps) and full-speed (12 Mbps) USB operation, 48-bit addressing for large drives, ATA Security Features, and dual-device configurations (e.g., CompactFlash + ATA slave). It is deployed in portable USB hard drives and bus-powered CF readers.
For engineers reviewing the CY7C68320C-56PVXC datasheet, CY7C68320C-56PVXC pinout, CY7C68320C-56PVXC application, or CY7C68320C-56PVXC equivalent, key selection criteria include USB Mass Storage Class Bulk-Only Transport compliance, ATA PIO/DMA/UDMA mode support, 56-pin QFN package compatibility, and HID/GPIO extensibility for user interface functions.
Technical Context
The CY7C68320C implements a dedicated hardware bridge between USB 2.0 and ATA/ATAPI-6 interfaces, with no programmable MCU core-operation is fully fixed-function and descriptor-driven via external EEPROM. Its internal 4 KB FIFO buffers data to mitigate ATA device seek latency, and it supports both self-powered and USB bus-powered configurations.
It integrates a Smart USB FS/HS engine, PLL-based clock generation from 24 MHz crystal, I²C bus master for EEPROM configuration, and tri-stateable ATA control logic enabling shared ATA bus operation with other controllers (e.g., IEEE-1394 bridges). IRQ signaling and VBUS-powered ATA enablement are natively supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Interface | Compliant with USB 2.0 specification (TID# 40490119); supports High Speed (480 Mbps) and Full Speed (12 Mbps) modes. |
| ATA/ATAPI Support | Fully compliant with ATA/ATAPI-6; supports PIO Modes 0/3/4, Multiword DMA Mode 2, UDMA Modes 2/3/4. |
| Addressing | 48-bit LBA addressing enables support for hard drives >137 GB without CHS translation limitations. |
| Power Modes | Supports both self-powered and USB bus-powered operation-enables truly portable CF readers and USB HDD enclosures. |
| Configuration Storage | Uses external serial EEPROM (I²C interface) for USB descriptors, device configuration, and pinout selection signature (0x534B for AT2LP mode). |
| GPIO/HID Capability | CY7C68320C provides GPIO0–GPIO2 and HID interface for button/LED control-no firmware required for single-button backup or power-off functions. |
| ATA Bus Sharing | ATA interface can be placed in high-impedance state, allowing coexistence with other ATA controllers on same bus (e.g., MP3 decoder or FireWire bridge). |
Pinout & Package
The CY7C68320C-56PVXC is housed in a 56-pin, 8 mm × 8 mm, 0.5 mm pitch Pb-free QFN package with exposed thermal pad (VSS). Pin functions are defined for AT2LP-native mode (EEPROM signature 0x534K), not backward-compatible CY7C68300A mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RESET# | Active-low reset input | Asynchronous hardware reset; asserted low resets internal logic and USB state machine. |
| ARESET# | ATA reset output | Drives ATA device reset signal; synchronized to ATA timing and asserted during initialization. |
| VBUS_ATA_ENABLE | ATA power enable control | Enables VBUS-derived power to ATA interface-critical for bus-powered CF readers. |
| GPIO0–GPIO2 | General-purpose I/O / HID endpoints | Configurable as inputs/outputs or HID report sources-used for pushbutton detection or LED notification without firmware. |
| DPLUS / DMINUS | USB 2.0 differential pair | Direct connection to USB host/hub; requires 27 Ω series resistors and ESD protection per USB spec. |
| DD0–DD15 | ATA data bus (16-bit) | Bidirectional parallel data path; supports all ATA transfer modes including UDMA4 (66 MB/s). |
| DIOR# / DIOW# / DMACK# | ATA control signals | Standard ATA read/write strobes and DMA acknowledge-fully compatible with legacy IDE peripherals. |
| SCL / SDA | I²C bus interface | Connects to external EEPROM for configuration; operates at up to 400 kHz standard-mode speed. |
Key Features
| Feature | Design Value |
|---|---|
| No-firmware bridge architecture | Fixed-function logic eliminates need for embedded firmware development, reducing time-to-market and qualification effort. |
| 4 KB integrated FIFO buffer | Decouples USB and ATA timing domains, absorbing burst latency from ATA device seeks and improving sustained throughput. |
| ATA bus tri-state capability | Allows sharing of ATA bus with secondary controller (e.g., IEEE-1394 bridge), enabling multi-interface storage subsystems. |
| HID + GPIO interface | Enables hardware-level user interaction (e.g., one-button backup, LED status) without host driver or firmware modification. |
| Backward-compatible pinout option | EEPROM signature (0x4D4D) selects CY7C68300A-compatible pin mapping-supports drop-in replacement in legacy AT2 designs. |
Applications
| Portable USB Hard Drive Enclosure | CompactFlash Reader (Bus-Powered) |
|---|---|
|
Use Scenario: External 2.5" SATA-to-USB adapters replaced by cost-optimized ATA-based enclosures using CY7C68320C. IC Role / Device Role / Timing Role: USB-to-ATA protocol translator; handles BOT command parsing, ATA command translation, and data buffering. Use Value: Enables plug-and-play Windows/macOS compatibility without custom drivers; supports UDMA4 for >40 MB/s sustained transfers. |
Use Scenario: Credit-card-sized CF readers powered solely from USB VBUS, used in digital cameras and field data loggers. IC Role / Device Role / Timing Role: Bus-powered ATA interface controller with VBUS_ATA_ENABLE and low-power 3.3V operation. Use Value: Eliminates external power supply; GPIO2 used for card-detect interrupt, reducing host polling overhead. |
| Dual-Device Media Adapter | Industrial ATA Storage Module |
|
Use Scenario: Embedded media player supporting simultaneous CF card and 2.5" ATA drive via shared bus topology. IC Role / Device Role / Timing Role: ATA bus arbiter and Hi-Z controller; manages device selection (CS0#/CS1#) and IRQ routing. Use Value: Enables dual-storage flexibility without additional glue logic; supports ATAPI serial number VPD for DRM-compliant content playback. |
Use Scenario: Ruggedized industrial PC module storing firmware logs and sensor data on ATA flash disk. IC Role / Device Role / Timing Role: Fixed-function bridge with ATA Security Feature Set support for password-protected storage access. Use Value: Meets IEC 62443-3-3 requirements for secure boot and authenticated storage; uses 48-bit LBA for >2 TB capacity scalability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-to-ATA bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C68321C-100AXC | 100-pin TQFP package; adds GPIO3–GPIO5 and SYSIRQ; higher pin count enables more complex board-level test and interrupt routing. | Preferred for new industrial designs requiring extended GPIO, board-level manufacturing test, or multi-interrupt handling. | Select when layout allows larger footprint and additional I/O is needed for diagnostics or system integration. |
| CY7C68300C-56PVXC | 56-pin QFN; lacks GPIO/HID features; pinout matches CY7C68300A in backward-compatibility mode (0x4D4D EEPROM signature). | Targeted at cost-sensitive, firmware-free CF readers where HID functionality is unnecessary and legacy AT2 layout reuse is required. | Choose only if migrating existing CY7C68300A designs with unchanged PCB and EEPROM data. |
Compared with CY7C68321C-100AXC, the CY7C68320C-56PVXC trades GPIO count and package size for compactness and lower BOM cost; versus CY7C68300C-56PVXC, it delivers native HID/GPIO capability without requiring backward-compatibility mode, simplifying configuration and enabling richer user interfaces.
Availability
CY7C68320C-56PVXC is available at Aetrix Electronics and suitable for portable USB storage enclosures, bus-powered CompactFlash readers, and industrial ATA-based data loggers requiring stable component supply across long-lifecycle production programs.
Supply support for CY7C68320C-56PVXC 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) is a fabless semiconductor company specializing in USB, memory, PSoC, and connectivity solutions for embedded systems.
The EZ-USB AT2LP product line was engineered specifically to replace legacy USB-to-IDE bridges with lower-power, smaller-footprint, firmware-free alternatives for mass storage peripheral manufacturers.
FAQ
Does CY7C68320C-56PVXC require firmware development?
No. The CY7C68320C-56PVXC is a fixed-function bridge IC with no programmable core. All USB Mass Storage Class BOT and ATA/ATAPI protocol handling is implemented in hardware. Only external EEPROM programming (for descriptors and configuration) is required-no firmware coding or compilation is needed.
What is the role of the 24 MHz crystal and internal PLL?
The 24 MHz crystal feeds the internal PLL, which generates precise clocks for USB high-speed (480 MHz core clock, 60 MHz USB PHY clock) and ATA timing (e.g., UDMA4 66 MHz strobes). XTALOUT/XTALIN pins are dedicated; no external oscillator is supported.
Can CY7C68320C-56PVXC support two ATA devices simultaneously?
Yes. It supports one or two ATA/ATAPI devices in configurations including master-only, slave-only, master+slave, CompactFlash-only, or CF + removable IDE master. CS0# and CS1# pins select device addressing, and ARESET# is routed to both devices during initialization.
How does the HID interface function without firmware?
The HID interface is hardwired to GPIO0–GPIO2 and mapped to predefined report descriptors stored in the external EEPROM. Button presses or GPIO state changes automatically generate standard USB HID reports (e.g., Consumer Page usage codes), requiring no host-side driver customization.
CY7C68320C-56PVXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Bridge, USB to ATA
- Interface:
- ATA
- Standards:
- USB 2.0
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 50mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 56-SSOP
- Grade:
- -
- Qualification:
- -
CY7C68320C-56PVXC FAQ
1.How can I place an order for CY7C68320C-56PVXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C68320C-56PVXC 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 CY7C68320C-56PVXC reliable?
The price and inventory of CY7C68320C-56PVXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C68320C-56PVXC is usually 5 days.
3.What payment methods are accepted for CY7C68320C-56PVXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C68320C-56PVXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C68320C-56PVXC?
CY7C68320C-56PVXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C68320C-56PVXC 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 CY7C68320C-56PVXC?
For technical support, including CY7C68320C-56PVXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C68320C-56PVXC requirements.
6.How does Aetrix verify that CY7C68320C-56PVXC is sourced from the original manufacturer or authorized distributors?
All CY7C68320C-56PVXC 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 CY7C68320C-56PVXC meets industry standards.
7.What is the process for return or replacement of CY7C68320C-56PVXC?
All CY7C68320C-56PVXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C68320C-56PVXC, 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 CY7C68320C-56PVXC part is unused and in its original packaging.
Return procedure for CY7C68320C-56PVXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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