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Infineon Technologies CY7C68301C-56LTXC
- Part No.:
- CY7C68301C-56LTXC
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY7C68301C-56LTXC.pdf
- Description:
- IC USB 2.0 BRIDGE AT2LP 56VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
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Product details
Overview
CY7C68301C-56LTXC from Cypress Semiconductor is a fixed-function USB 2.0 to ATA/ATAPI-6 bridge IC enabling bus-powered CompactFlash readers and portable USB hard drives. It operates at 480 Mbps (High Speed) or 12 Mbps (Full Speed), supports PIO Modes 0/3/4, UDMA Modes 2–4, and 48-bit addressing for >137 GB drives. Its 56-pin SSOP package integrates a 4 KB FIFO buffer and I²C EEPROM interface for descriptor storage.
For engineers reviewing the CY7C68301C-56LTXC datasheet, CY7C68301C-56LTXC pinout, CY7C68301C-56LTXC application, or CY7C68301C-56LTXC equivalent, key selection criteria include backward compatibility with CY7C68300A, ATA/ATAPI dual-device support, Hi-Z ATA bus sharing capability, and low-power 3.3 V operation for battery-powered designs.
Technical Context
The CY7C68301C implements a dedicated hardware bridge between USB 2.0 and ATA/ATAPI-6 interfaces without firmware execution. Its Smart USB FS/HS Engine handles Bulk-Only Transport (BOT) protocol compliance, while internal logic manages ATA command translation, IRQ assertion, and DMA handshaking via DMACK#/DIOR#/DIOW# signals.
It features dual-mode initialization: automatic detection of 0x4D4D EEPROM signature enables CY7C68300A pinout compatibility; 0x534B selects native AT2LP pinout. The 24 MHz crystal oscillator feeds an integrated PLL for USB clock synthesis, and the ATA interface supports both master-only and master/slave configurations with CompactFlash coexistence.
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) operation |
| ATA/ATAPI Support | Fully compliant with ATA/ATAPI-6; supports PIO Modes 0, 3, 4; UDMA Modes 2, 3, 4; and 48-bit LBA addressing |
| Power Modes | Self-powered and USB bus-powered operation; optimized for battery-powered CF readers via low 3.3 V core supply |
| Buffer Memory | Integrated 4 KB FIFO buffer minimizes data loss during ATA device seek latency and improves sustained transfer throughput |
| Configuration Storage | External I²C serial EEPROM stores USB descriptors, device configuration, and pinout selection signature (0x4D4D or 0x534B) |
| ATA Bus Control | Supports Hi-Z mode for shared ATA bus operation with secondary controllers (e.g., IEEE-1394 bridges or MP3 decoders) |
Pinout & Package
Package: 56-pin SSOP (Small Outline Integrated Circuit), Pb-free, RoHS-compliant, 0.635 mm pitch, body size 18.4 mm × 7.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DD0–DD15 | ATA Data Bus (16-bit) | Bi-directional parallel data path for ATA/ATAPI transfers; supports all PIO and UDMA modes |
| DA0–DA2 | ATA Address Lines | Selects ATA register or command block; enables full 48-bit LBA address decoding when combined with CS0#/CS1# |
| DIOR#, DIOW#, DMACK# | ATA Control Signals | Direct strobes for read/write cycles and DMA acknowledgment; compatible with standard ATA timing requirements |
| IORDY, DMARQ, INTRQ | ATA Status & Handshake | Signals device readiness, DMA request, and interrupt assertion to coordinate host-to-device synchronization |
| DPLUS, DMINUS | USB 2.0 Differential Pair | High-speed (480 Mbps) or full-speed (12 Mbps) USB signaling; internally terminated and ESD-protected |
| SCL, SDA | I²C Serial Interface | Configures device identity, USB descriptors, and pinout mode via external EEPROM (e.g., AT24C02) |
| RESET#, ARESET# | Reset Inputs | Hardware reset (active-low) and VBUS-powered reset validation signal for robust power sequencing |
| VBUS_ATA_ENABLE | ATA Power Enable | Controls power delivery to attached ATA devices based on USB VBUS presence; critical for bus-powered CF readers |
Key Features
| Feature | Design Value |
|---|---|
| No firmware required | Fixed-function hardware implementation eliminates firmware development, validation, and field updates |
| CY7C68300A pin compatibility | Automatic EEPROM signature detection (0x4D4D) enables drop-in replacement in legacy AT2 designs without PCB changes |
| Hi-Z ATA bus control | Allows safe sharing of ATA bus with secondary controllers (e.g., IEEE-1394 bridges), avoiding signal contention |
| ATA security & boot support | Enables ATA Security Mode commands and Mode Page 5 for BIOS boot sector access in embedded storage systems |
| DRM-compatible VPD retrieval | Supports ATAPI Serial Number VPD page read for digital rights management in consumer media players |
Applications
| CompactFlash Readers | Portable USB Hard Drives |
|---|---|
Use Scenario: Battery-powered handheld devices reading CF cards for field data capture or photo transfer. IC Role / Device Role / Timing Role: USB-to-ATA bridge translating host BOT commands into ATA PIO/UDMA transfers; manages VBUS-powered ATA enable and Hi-Z bus release. Use Value: Enables true bus-powered operation with no external power adapter; 3.3 V core reduces system power budget by >40% vs. 5 V alternatives. | Use Scenario: External 2.5-inch HDD enclosures requiring plug-and-play mass storage class compliance. IC Role / Device Role / Timing Role: Fixed-function bridge handling BOT protocol, ATA command translation, and 4 KB FIFO buffering to absorb seek latency. Use Value: Eliminates need for custom USB firmware; achieves >30 MB/s sustained throughput using UDMA Mode 4 on 2.5-inch drives. |
| MP3 Player Docking Stations | Industrial Data Loggers |
Use Scenario: Desktop docks syncing audio files between PC and flash-based MP3 players using ATA/ATAPI interface. IC Role / Device Role / Timing Role: ATA/ATAPI slave controller supporting ATAPI command set and VPD page reads for device identification and DRM. Use Value: Enables seamless Windows/Mac OS X driver compatibility without vendor-specific drivers; supports serial number-based license binding. | Use Scenario: Ruggedized field loggers recording sensor data to microdrives or CompactFlash in harsh environments. IC Role / Device Role / Timing Role: ATA master controller with 48-bit LBA support and ATA Security Mode for encrypted data storage. Use Value: Allows >137 GB capacity addressing and hardware-level password protection-critical for regulatory compliance in industrial telemetry. |
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 |
|---|---|---|---|
| CY7C68300C-56LTXC | Same pinout and package; differs only in power optimization-designed for self- and bus-powered use, not battery-optimized | Lacks low-quiescent-current design for extended battery life; higher active current draw in sleep states | Select when board uses external 5 V regulation and does not require battery runtime extension |
| CY7C68321C-56LTXC | 56-pin QFN package; adds GPIO0–GPIO2 for button/LED control; identical ATA/USB functionality | Requires PCB redesign due to QFN footprint; enables user interface features (e.g., single-button backup) not supported by SSOP variant | Select when mechanical layout allows QFN and system requires HID-like controls beyond pure bridge function |
Compared with CY7C68300C-56LTXC, CY7C68301C-56LTXC delivers lower standby current for battery longevity; compared with CY7C68321C-56LTXC, it retains SSOP compatibility for legacy AT2 layouts but omits GPIOs needed for user interaction features.
Availability
CY7C68301C-56LTXC is available at Aetrix Electronics and suitable for CompactFlash readers, portable USB hard drives, MP3 player docking stations, and industrial data loggers requiring stable component supply across long-lifecycle embedded programs.
Supply support for CY7C68301C-56LTXC 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, and programmable system-on-chip solutions for embedded and consumer electronics.
The EZ-USB AT2LP product line was designed specifically to replace legacy USB-to-IDE bridges with lower power, higher integration, and zero-firmware operation-targeting cost-sensitive, battery-powered mass storage peripherals.
FAQ
What is the purpose of the 0x4D4D EEPROM signature?
The 0x4D4D signature (ASCII "MM") instructs the CY7C68301C to activate CY7C68300A pinout compatibility mode, enabling direct replacement in existing AT2 designs without PCB or firmware changes. This signature must be written to the first two bytes of the external I²C EEPROM connected to SCL/SDA pins.
Does CY7C68301C-56LTXC support UDMA Mode 5 or higher?
No. The CY7C68301C supports UDMA Modes 2, 3, and 4 per the ATA/ATAPI-6 specification, with maximum theoretical burst rate of 66 MB/s. UDMA Mode 5 (100 MB/s) and Mode 6 (133 MB/s) are not implemented in this device's ATA interface logic.
Can the ATA interface operate in master/slave configuration simultaneously with CompactFlash?
Yes. The device supports "ATA/ATAPI slave and CompactFlash or other removable IDE master" configuration per datasheet page 2. This allows one CF card and one ATA slave device (e.g., optical drive) to share the same bridge, with independent command arbitration handled internally.
Is an external crystal required for USB operation?
Yes. A 24 MHz fundamental-mode crystal must be connected between XTALIN and XTALOUT pins. The internal PLL uses this reference to generate precise 48 MHz and 480 MHz clocks required for Full Speed and High Speed USB operation respectively.
CY7C68301C-56LTXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-VFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Bridge, USB to ATA
- Interface:
- ATA
- Standards:
- USB 2.0
- Voltage - Supply:
- 3.15V ~ 3.45V
- Current - Supply:
- 50mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 56-QFN (8x8)
- Grade:
- -
- Qualification:
- -
CY7C68301C-56LTXC FAQ
1.How can I place an order for CY7C68301C-56LTXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C68301C-56LTXC 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 CY7C68301C-56LTXC reliable?
The price and inventory of CY7C68301C-56LTXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C68301C-56LTXC is usually 5 days.
3.What payment methods are accepted for CY7C68301C-56LTXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C68301C-56LTXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C68301C-56LTXC?
CY7C68301C-56LTXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C68301C-56LTXC 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 CY7C68301C-56LTXC?
For technical support, including CY7C68301C-56LTXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C68301C-56LTXC requirements.
6.How does Aetrix verify that CY7C68301C-56LTXC is sourced from the original manufacturer or authorized distributors?
All CY7C68301C-56LTXC 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 CY7C68301C-56LTXC meets industry standards.
7.What is the process for return or replacement of CY7C68301C-56LTXC?
All CY7C68301C-56LTXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C68301C-56LTXC, 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 CY7C68301C-56LTXC part is unused and in its original packaging.
Return procedure for CY7C68301C-56LTXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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