CY7C68321C-100AXC - USB 2.0 ATA Bridge | Cypress
料号： CY7C68321C-100AXC ✗ 停产CY7C68321C-100AXC 概述
A USB-to-ATA bridge is an interface controller that translates USB host transactions into ATA or ATAPI commands for storage devices. The CY7C68321C-100AXC sits between a USB system and an ATA storage bus, providing protocol bridging rather than operating as a general-purpose microcontroller or storage device itself. Its USB 2.0 interface makes it suitable for legacy and embedded systems requiring a host-side connection to IDE or compatible storage peripherals.
The main functional features include support for Compact Flash and one ATA or ATAPI device, support for board-level manufacturing testing through USB, and an ATA interface high-impedance state. The high-impedance capability is useful in multi-controller systems because it can electrically isolate the ATA bus while another controller, including an IEEE-1394 controller, is active. This feature helps reduce bus contention and supports controlled ownership of the shared storage interface.
The CY7C68321C-100AXC is identified by the verified manufacturer and distributor listings as an EZ-USB AT2LP USB 2.0 to ATA/ATAPI bridge in a 100-LQFP package, with an operating temperature range of 0 °C to 70 °C and a 3.15 V to 3.45 V operating supply range. The product is listed as obsolete or end-of-life in the available product information, so new designs should verify lifecycle status and consider a redesign or an explicitly qualified replacement rather than assuming a current production commitment.
Typical applications include USB-to-IDE storage adapters, embedded data acquisition systems with legacy ATA storage, Compact Flash equipment, board-level production test systems, and shared ATA-bus designs involving more than one storage controller. For new USB storage products, the design should account for the legacy ATA electrical interface and verify the bridge firmware, cable, connector, power, and operating-system compatibility. The verified information identifies the package and core interface functions, while a complete pin description, electrical timing details, and a manufacturer application reference should be confirmed in the official device documentation before layout release.
直接替换替代料： CY7C68321C-100AXC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CY7C68321C-100AXC （相同外形与封装尺寸） ——差异在于 Package, Product Type.
CY7C68321-100AXC
✅ 直接替换联系询价
查看数据手册 →CY7C64713-100AXC
✅ 直接替换📋 参考替代料（不在目录中）
CY7C68321C-100AXC 规格参数
| Product Type | USB 2.0 to ATA/ATAPI bridge controller |
| Product Family | EZ-USB AT2LP |
| USB Standard | USB 2.0 |
| ATA Interface | ATA/ATAPI |
| Maximum ATA Devices | 1 device |
| Compact Flash Support | Yes |
| Board-Level Manufacturing Test | Supported through USB interface |
| ATA Interface High-Impedance Mode | Yes |
| 工作电源电压 | 3.15 V to 3.45 V |
| 工作温度范围 | 0 °C to 70 °C |
| 封装 | 100-LQFP, 14 mm x 20 mm |
| 安装类型 | Surface Mount |
| Interface Function | USB bridge, USB to ATA |
| Protocol | USB |
| Shared ATA Bus Support | Hi-Z ATA interface for sharing with another controller |
| 生命周期状态 | Obsolete (EOL) |
| 引脚数量 | 100 pins |
| Manufacturer | Cypress Semiconductor Corp |
CY7C68321C-100AXC 100-lqfp, 14 mm x 20 mm 引脚配置指南
CY7C68321C-100AXC（100-lqfp, 14 mm x 20 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： CY7C68321C-100AXC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CY7C68321C-100AXC 适用于 6 应用s: USB-to-ATA Storage Adapter, Compact Flash Equipment, Embedded ATA Data Acquisition, Board-Level Manufacturing Test, Shared ATA Bus Controller, Industrial Legacy Peripheral Controller.
USB-to-ATA Storage Adapter
The CY7C68321C-100AXC fits legacy USB-to-ATA adapter designs because it combines a USB 2.0 host interface with an ATA/ATAPI bridge and supports one ATA device. It can be placed between a USB connector and an IDE-compatible storage connector, with the bridge translating host commands for the attached disk or solid-state device. The 3.15 V to 3.45 V supply requirement supports a 3.3 V interface design, while the 100-LQFP package provides a relatively high pin count for separate interface, power, control, and test signals. Because the listed lifecycle status is obsolete, this architecture is most appropriate for maintaining an existing product or a controlled legacy deployment after confirming availability and long-term sourcing.
推荐
Compact Flash Equipment
The explicit Compact Flash support makes the CY7C68321C-100AXC relevant to equipment that exposes a Compact Flash device through USB. The ATA/ATAPI side can serve one compatible storage device, while the USB side connects to a host controller or embedded USB system. An implementation must match the connector and signal assignments, provide suitable storage power, and validate the firmware behavior for the selected Compact Flash mode. The bridge's USB 2.0 interface provides the host-facing connection, but the product is listed as obsolete, so an engineering team should assess whether maintaining the legacy format is more valuable than migrating to a currently supported storage interface.
推荐
Embedded ATA Data Acquisition
The CY7C68321C-100AXC can serve as the USB-to-storage interface in an embedded acquisition system that records data to one ATA or ATAPI device. The USB 2.0 link provides a standardized connection to a host computer, while the ATA bridge handles communication with the storage medium. The design should budget for startup behavior, media error reporting, power-loss protection, and the operating-system compatibility of the storage protocol. A 100-LQFP footprint also requires a sufficiently dense board layout and careful separation of USB and ATA routing. For new deployments, confirm the obsolete part's availability and consider an actively supported bridge if legacy ATA media is not a firm requirement.
推荐
Board-Level Manufacturing Test
The CY7C68321C-100AXC supports board-level manufacturing testing through its USB interface, making it useful in production fixtures that need to exercise a storage subsystem during test. A test host can use the USB connection to command the bridge, verify ATA communication, and isolate nonfunctional boards before shipment. The test design should include controlled USB enumeration, defined power sequencing, ATA device emulation or attachment, and repeatable fault injection for the storage interface. The ability to place the ATA interface in a high-impedance state may also help isolate bus segments during fixture diagnostics. Production software and test coverage should be qualified against the exact bridge configuration and the selected ATA or Compact Flash device.
推荐
Shared ATA Bus Controller
The CY7C68321C-100AXC is useful in a shared ATA-bus architecture because its ATA interface can enter a high-impedance state. This allows the USB bridge to disconnect electrically while another controller, such as an IEEE-1394 controller, owns the ATA bus. The arrangement can support legacy storage access across multiple host technologies, but it requires unambiguous arbitration so that only one controller enables its ATA outputs at a time. Signal timing, bus turnaround, and contention behavior must be reviewed in the manufacturer documentation. The obsolete lifecycle status makes careful sourcing and a long-term maintenance plan essential if the shared-bus function remains in the product architecture.
推荐
Industrial Legacy Peripheral Controller
The CY7C68321C-100AXC can bridge a modern USB host to an older industrial peripheral that exposes an ATA or ATAPI interface. The 0 °C to 70 °C operating range suits equipment designed for controlled commercial or indoor industrial environments, provided the complete enclosure temperature remains within that range. The 3.3 V supply compatibility and one-device ATA support simplify integration with systems that already use legacy storage. Engineers should verify power-loss behavior, connector wiring, USB enumeration, and the host-side driver requirements. If the system must remain in service for many years, request lifecycle and traceability information and evaluate a newer bridge where the ATA requirement can be changed.
推荐
推荐产品汇总
工程参考数据： CY7C68321C-100AXC ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | CY7C68321-100AXC | CY7C64713-100AXC |
|---|---|---|---|
| Package | 100-LQFP, 14 mm x 20 mm | 100-LQFP | 100-LQFP |
| Brand | Cypress Semiconductor Corp | Cypress Semiconductor Corp | Cypress Semiconductor Corp |
关键差异点
- ATA bus sharing support （对比 CY7C64713-100AXC)
- Compact Flash support （对比 CY7C64713-100AXC)
- Defined USB-to-ATA application （对比 CY7C68321-100AXC)
设计说明
The CY7C68321C-100AXC operates from 3.15 V to 3.45 V. Design the USB and bridge side around a regulated 3.3 V rail, place bypass capacitance close to the device power pins, and verify the rail under USB attach, ATA spin-up, and fault conditions. The ATA storage device power budget should be separated from the bridge's local supply so that inrush and load transients do not pull the controller rail outside its specified range.
Use the manufacturer package drawing and pin-description table for the 100-LQFP footprint rather than relying on a generic library symbol. Route USB and ATA signals with controlled impedance where required, provide a continuous ground reference, and keep the ATA connector and storage-device power return away from sensitive USB traces. Confirm the exposed or thermal-related package requirements and assembly clearances before releasing the PCB.
Do not treat the ATA high-impedance function as automatic bus arbitration. The system must ensure that only one controller drives the shared ATA bus at a time, with correct sequencing between the USB bridge and the alternate controller. Also validate the exact ATA device, Compact Flash mode, connector pinout, firmware, and operating-system behavior; the bridge's advertised protocol support does not by itself guarantee that every media type or host combination will interoperate.
The listed lifecycle status is obsolete, so production continuity requires a controlled sourcing plan. Record the manufacturer, exact MPN, package form, quantity, traceability requirements, and approved alternate status in the product documentation. When evaluating a candidate substitute, compare USB signals, ATA data and control signals, power pins, clock requirements, timing, package drawings, and firmware assumptions rather than checking only the connector protocol.
合规信息
The available product information identifies the package, electrical supply range, temperature range, interface functions, and obsolete lifecycle status. It does not provide definitive RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.
