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Infineon Technologies CY7C68321C-100AXC
- Part No.:
- CY7C68321C-100AXC
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 100-LQFP
- Datasheet:
-
CY7C68321C-100AXC.pdf
- Description:
- IC USB 2.0 BRIDGE AT2LP 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,376
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Product details
Overview
CY7C68321C-100AXC from Cypress Semiconductor is a fixed-function USB 2.0 to ATA/ATAPI-6 bridge IC enabling high-speed mass storage connectivity. It supports UDMA Mode 4 (66 MB/s), 48-bit LBA addressing for >137 GB drives, and dual-device configuration (e.g., CompactFlash + ATA slave). Designed for battery-powered portable storage, it operates at 3.3 V with bus- or self-powered modes and integrates a 4 KB FIFO buffer to minimize seek-time latency.
For engineers reviewing the CY7C68321C-100AXC datasheet, CY7C68321C-100AXC pinout, CY7C68321C-100AXC application, or CY7C68321C-100AXC equivalent, key selection criteria include TQFP-100 package compatibility, HID/GPIO configurability for user controls, ATA security feature support, and native BOT-class driver interoperability across Windows and macOS.
Technical Context
The CY7C68321C implements a dedicated hardware bridge between USB 2.0 (480 Mbps HS / 12 Mbps FS) and parallel ATA/ATAPI-6 interfaces, eliminating firmware development. Its internal 4 KB FIFO decouples USB and ATA timing domains, enabling efficient burst transfers under PIO Modes 0/3/4, Multiword DMA Mode 2, and UDMA Modes 2–4.
It features dual power-mode operation (VBUS-powered or external 3.3 V), configurable ATA initialization, and hardware-level support for ATA security commands, ATAPI serial number VPD retrieval, and BIOS boot via Mode Page 5 - all without host-side driver modification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Interface | Compliant with USB 2.0 spec; supports High Speed (480 Mbps) and Full Speed (12 Mbps) with BOT transport. |
| ATA/ATAPI Support | Fully compliant with ATA/ATAPI-6; enables 48-bit LBA addressing for drives >137 GB. |
| Data Transfer Modes | Supports PIO Modes 0/3/4, Multiword DMA Mode 2, and UDMA Modes 2/3/4 (up to 66 MB/s). |
| Power Supply | Single 3.3 V supply; supports bus-powered (500 mA max) and self-powered configurations. |
| FIFO Buffer | Integrated 4 KB FIFO reduces ATA device seek-time impact on USB throughput. |
| Package | 100-pin TQFP (14 × 14 mm, 0.5 mm pitch), Pb-free, RoHS-compliant. |
| Operating Temperature | Industrial range: –40 °C to +85 °C ambient. |
Pinout & Package
Package: 100-pin Thin Quad Flat Package (TQFP), 14 mm × 14 mm body, 0.5 mm lead pitch, exposed thermal pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DPLUS / DMINUS | USB 2.0 differential data pair | Direct connection to USB host/hub; requires 90 Ω differential impedance routing. |
| DD0–DD15 | 16-bit ATA data bus | Bidirectional parallel interface supporting all ATA transfer modes; 3.3 V tolerant. |
| DA0–DA2, CS0#, CS1#, DIOR#, DIOW#, DMACK#, IORDY, DMARQ | ATA control and address signals | Full set of ATA timing-critical control lines; supports master/slave and CF-only configurations. |
| GPIO0–GPIO5 | Configurable general-purpose I/O | Available only on CY7C68320C/CY7C68321C; used for HID functions (e.g., backup button, LED notification). |
| SCL / SDA | I²C bus interface | Connects to external EEPROM (e.g., 24AA02) storing USB descriptors and device configuration. |
| VBUS_ATA_ENABLE | ATA interface power enable | Controls power gating to ATA devices; enables low-power suspend states and hot-swap safety. |
| RESET# / ARESET# | Active-low reset inputs | Hardware reset (RESET#) and VBUS-valid assertion (ARESET#) for robust power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| No-firmware fixed-function architecture | Eliminates embedded firmware development, qualification, and update overhead for mass storage bridges. |
| HID interface capability | Enables USB Human Interface Device class endpoints for push-button controls (e.g., one-touch backup) without custom drivers. |
| ATA bus high-impedance mode | Allows shared ATA bus operation with secondary controllers (e.g., IEEE-1394 bridge or MP3 decoder) via software-controlled Hi-Z state. |
| Board-level manufacturing test support | USB interface enables in-system functional testing of ATA devices pre-flashing, reducing production test complexity. |
| ATA security command support | Hardware-accelerated execution of ATA SECURITY ERASE PREPARE, SECURITY UNLOCK, and related commands for secure drive disposal. |
Applications
| Portable USB Hard Drive | CompactFlash Reader |
|---|---|
Use Scenario: Battery-powered external 2.5″ HDD enclosure with USB-C or USB-A host interface. IC Role / Device Role / Timing Role: USB-to-ATA bridge managing command translation, flow control, and power-state coordination between host and drive. Use Value: Enables full UDMA Mode 4 performance (66 MB/s) while maintaining <150 mA bus-power compliance and seamless Windows/macOS plug-and-play. |
Use Scenario: Handheld digital camera or audio recorder using CF Type I/II cards as primary storage. IC Role / Device Role / Timing Role: Fixed-function bridge translating USB BOT commands into CF IDE protocol with automatic timing adaptation. Use Value: Supports CF card hot-swap detection and ATA security erase via native command pass-through, critical for field-deployed media devices. |
| Digital Video Recorder (DVR) | Industrial Data Logger |
Use Scenario: Embedded DVR system recording MPEG-2/4 streams to internal 3.5″ SATA-to-ATA adapter or 2.5″ HDD. IC Role / Device Role / Timing Role: Bridge IC handling sustained write bursts (e.g., 1080p@30fps) with 4 KB FIFO buffering to absorb ATA seek latency. Use Value: Ensures uninterrupted streaming by decoupling USB host polling intervals from ATA mechanical delays, preventing frame drops. |
Use Scenario: Ruggedized environmental sensor node logging time-stamped data to microdrive or industrial CF card. IC Role / Device Role / Timing Role: ATA interface controller with VBUS_PWR_VALID monitoring and low-power suspend/resume for energy-constrained deployments. Use Value: Achieves <5 µA deep-sleep current when idle, extending battery life in unattended field installations up to 18 months. |
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 |
|---|---|---|---|
| CY7C68320C-100AXC | Identical pinout and functionality but optimized for self-powered designs; lacks battery-efficiency tuning in power management logic. | Preferred for desktop enclosures or AC-powered readers where VBUS current headroom is not constrained. | Select when board-level power regulation is available and lowest quiescent current is not required. |
| CY7C68301C-56PVXC | 56-pin QFN package; supports same ATA/USB protocols but omits GPIOs and HID interface; lower pin count limits peripheral expandability. | Suitable for space-constrained CF readers or legacy AT2-compatible upgrades where HID features are unnecessary. | Choose for cost-sensitive, size-limited designs requiring backward compatibility with CY7C68300A layouts. |
Compared with CY7C68320C-100AXC, the CY7C68321C-100AXC delivers tighter VBUS current regulation and deeper sleep states for battery longevity, while CY7C68301C-56PVXC trades GPIO flexibility and package size for layout simplicity and legacy design reuse.
Availability
CY7C68321C-100AXC is available at Aetrix Electronics and suitable for portable USB storage enclosures, CompactFlash readers, digital video recorders, and industrial data loggers requiring stable component supply and long-term lifecycle assurance.
Supply support for CY7C68321C-100AXC 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 engineered specifically to replace legacy USB-to-IDE bridges with lower power, higher integration, and zero-firmware operation - targeting portable mass storage and industrial removable-media systems.
FAQ
Does CY7C68321C-100AXC require external firmware programming?
No. The CY7C68321C-100AXC is a fixed-function bridge IC with hardwired USB Mass Storage Class (MSC) and ATA/ATAPI logic. Configuration is handled solely via an external I²C EEPROM containing USB descriptors and device settings - no firmware development, compilation, or flashing is needed.
Can CY7C68321C-100AXC support both CompactFlash and a standard ATA hard drive simultaneously?
Yes. The device supports two ATA/ATAPI devices in master/slave configuration or one CompactFlash device plus one ATA/ATAPI device (e.g., CF as master, HDD as slave). This is enabled through hardware-selectable device addressing and independent control signal routing per device.
What is the role of the GPIO pins on CY7C68321C-100AXC?
The six GPIO pins (GPIO0–GPIO5) are configurable as USB HID class endpoints or general-purpose digital I/O. They enable hardware-triggered functions such as single-button backup initiation, power-off sequencing, or LED status indication - all without modifying host software or requiring additional microcontrollers.
Is CY7C68321C-100AXC compatible with modern operating systems like Windows 10 or macOS Monterey?
Yes. As a USB Mass Storage Class Bulk-Only Transport (BOT) device, it uses native OS drivers. Cypress-provided drivers cover Windows 98SE through Windows XP, but post-XP versions (including Windows 10/11 and macOS 10.12+) rely on built-in MSC class drivers - no vendor-specific software is required for basic read/write operation.
CY7C68321C-100AXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 100-LQFP
- 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:
- 100-TQFP (14x20)
- Grade:
- -
- Qualification:
- -
CY7C68321C-100AXC FAQ
1.How can I place an order for CY7C68321C-100AXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C68321C-100AXC 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 CY7C68321C-100AXC reliable?
The price and inventory of CY7C68321C-100AXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C68321C-100AXC is usually 5 days.
3.What payment methods are accepted for CY7C68321C-100AXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C68321C-100AXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C68321C-100AXC?
CY7C68321C-100AXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C68321C-100AXC 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 CY7C68321C-100AXC?
For technical support, including CY7C68321C-100AXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C68321C-100AXC requirements.
6.How does Aetrix verify that CY7C68321C-100AXC is sourced from the original manufacturer or authorized distributors?
All CY7C68321C-100AXC 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 CY7C68321C-100AXC meets industry standards.
7.What is the process for return or replacement of CY7C68321C-100AXC?
All CY7C68321C-100AXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C68321C-100AXC, 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 CY7C68321C-100AXC part is unused and in its original packaging.
Return procedure for CY7C68321C-100AXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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