CY7C68321-100AXC USB 2.0 ATA Bridge | Cypress
料号： CY7C68321-100AXC ✓ 量产中CY7C68321-100AXC 概述
The CY7C68321 belongs to the EZ-USB AT2LP family of USB storage interface controllers. An interface IC is a semiconductor category used to connect host buses and peripheral protocols; in this case, the bridge translates the USB 2.0 host interface into ATA/ATAPI signals used by compatible storage devices. Its position within the broader hierarchy is interface IC, then USB interface controller, then fixed-function USB-to-ATA bridge.
Verified listing information identifies the part as a 480 Mbps USB 2.0 interface solution with a 3.15 V minimum and 3.45 V maximum operating voltage. The ATA side can support CompactFlash and one ATA/ATAPI device. Its high-impedance ATA interface is useful when another controller, such as an IEEE 1394 device, must share the ATA bus. These details make the bridge relevant to legacy USB storage appliances, embedded ATA systems, and CompactFlash equipment.
The 100-pin TQFP package provides the board interface required for host, storage, power, control, and signal-conditioning connections. Because this legacy bridge targets USB 2.0 and ATA/ATAPI rather than modern USB storage standards, designers should verify host operating-system support, device compatibility, signal integrity, power sequencing, and connector requirements before releasing a new design. The verified distributor pages do not publish detailed timing, thermal, or environmental values, so those parameters remain to be confirmed from the manufacturer datasheet.
This page consolidates the verified product identity, package information, sourcing links, interface capability, and engineering selection criteria. It also distinguishes confirmed facts from parameters that require datasheet verification, helping engineers evaluate the CY7C68321-100AXC without treating catalog snippets as a complete electrical specification.
Designs should reserve adequate placement and routing flexibility for the 100-pin TQFP footprint, validate the ATA and USB signal-integrity requirements, and confirm device-support policy before production. For a new USB-to-ATA product, assess whether a modern USB mass-storage controller provides better long-term platform support. For maintaining an existing ATA/CompactFlash design, the bridge may remain suitable if its timing, power, and compatibility requirements are unchanged.
直接替换替代料： CY7C68321-100AXC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
CY7C68321C-100AXC
✅ 直接替换📋 参考替代料（不在目录中）
CY7C68321C-56LTXC
✅ 直接替换📋 参考替代料（不在目录中）
CY7C68320C-56LTXC
✅ 直接替换📋 参考替代料（不在目录中）
CY7C68321-100AXC 规格参数
| Product Type | Fixed-function USB 2.0 to ATA/ATAPI bridge IC |
| Product Family | EZ-USB AT2LP |
| USB Interface | USB 2.0 |
| Maximum USB Data Rate | 480 Mbps |
| ATA Support | ATA and ATAPI device support |
| Number of USB Ports | 1 port |
| Supported Device Configuration | CompactFlash and one ATA/ATAPI device |
| ATA Bus Sharing | High-impedance (Hi-Z) mode supported |
| Minimum Operating Voltage | 3.15 V |
| Maximum Operating Voltage | 3.45 V |
| 封装 | 100-TQFP (14 x 20 mm) |
| 引脚数量 | 100 pins |
| 安装类型 | Surface mount |
| Product Category | UART interface IC / USB bridge |
| AEC-Q100 Qualification | not_applicable |
CY7C68321-100AXC 100-tqfp (14 x 20 mm) 引脚配置指南
CY7C68321-100AXC（100-tqfp (14 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： CY7C68321-100AXC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CY7C68321-100AXC 适用于 6 应用s: Legacy USB 2.0 Storage Adapter, CompactFlash Embedded Storage, Shared ATA Bus Controller, Industrial Data Acquisition Terminal, Instrumentation USB-to-ATA Bridge, Retrofitted Peripheral Storage Interface.
Legacy USB 2.0 Storage Adapter
The CY7C68321-100AXC fits a legacy USB-to-ATA adapter because it provides a fixed-function USB 2.0 bridge operating up to 480 Mbps for one ATA or ATAPI device. Its 3.15 V to 3.45 V operating range and 100-TQFP package support a conventional 3.3 V embedded design. The verified datasheet excerpt also identifies CompactFlash support, which can simplify adaptation of an existing ATA storage architecture. Engineers should verify host-driver support, connector behavior, and the electrical limits of the selected drive before production.
推荐
CompactFlash Embedded Storage
The CY7C68321-100AXC is suitable for embedded CompactFlash equipment where a host controller must access ATA-based storage through USB 2.0. The verified EZ-USB AT2LP description explicitly includes CompactFlash and one ATA/ATAPI device as supported configurations, while the bridge's 480 Mbps maximum data rate accommodates the USB 2.0 interface. Validation should cover cold-start behavior, media identification, sustained transfer performance, power requirements, and operating-system compatibility with the exact CompactFlash module selected.
推荐
Shared ATA Bus Controller
The CY7C68321-100AXC can fit a mixed-interface design that shares an ATA bus between USB and another controller. The verified datasheet excerpt states that the ATA interface can be placed in high-impedance mode, allowing bus sharing with another controller such as an IEEE 1394 controller. This is useful in legacy multifunction systems, but correct arbitration and transition timing must be designed directly from the manufacturer datasheet. Board-level testing should verify no contention, no leakage problems, and correct recovery after bus release.
推荐
Industrial Data Acquisition Terminal
The CY7C68321-100AXC can serve as a storage interface in an industrial data-acquisition terminal that records measurements to an ATA or CompactFlash device. USB 2.0 at up to 480 Mbps provides a defined host-side transport rate, while fixed-function operation simplifies integration compared with a software-programmed USB controller. Industrial suitability must be established from the missing temperature, qualification, and environmental data rather than assumed. Firmware should include recovery behavior for unexpected media removal, power interruption, and device-reset conditions.
推荐
Instrumentation USB-to-ATA Bridge
The CY7C68321-100AXC is applicable to legacy instrumentation that stores captured waveforms or test records on ATA media through a USB 2.0 host connection. Its fixed-function USB-to-ATA architecture reduces the host-side protocol burden, and the verified source identifies USB 2.0 ATA interface operation with a 100-TQFP footprint. Designers should confirm whether the target instrument relies on ATA features beyond the supported device configuration and whether the bridge's USB enumeration behavior remains compatible with the installed operating system and test software.
推荐
Retrofitted Peripheral Storage Interface
The CY7C68321-100AXC can retrofit USB storage connectivity to an older peripheral that already exposes an ATA or ATAPI bus. The verified source confirms one USB port, support for CompactFlash and one ATA/ATAPI device, and an operating range of 3.15 V to 3.45 V. This use case is most appropriate when redesigning the host processor would be costly and the USB 2.0 platform remains supported. A complete compatibility review must include connector signaling, cable length, media power, device identification, and legacy driver support.
推荐
推荐产品汇总
工程参考数据： CY7C68321-100AXC ——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 | CY7C68321C-100AXC | CY7C68321C-56LTXC | CY7C68320C-56LTXC |
|---|---|---|---|---|
| Package | 100-TQFP (14 x 20 mm) | 100-TQFP (14 x 20 mm) | 100-TQFP (14 x 20 mm) | 100-TQFP (14 x 20 mm) |
| Brand | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor | Cypress Semiconductor |
| Product Type | USB Bridge, USB to ATA USB 2.0 ATA Interface | USB Bridge, USB to ATA USB 2.0 ATA Interface | EZ-USB AT2LP family candidate | EZ-USB AT2LP family candidate |
| Pin Count | 100 pins | 100 pins | 100 pins | 100 pins |
关键差异点
- Direct EZ-USB AT2LP ATA and CompactFlash support （对比 CY7C68320C-56LTXC)
- Verified USB 2.0 operating data （对比 CY7C68321C-56LTXC)
- Hi-Z ATA interface enables shared-bus designs （对比 CY7C68321C-100AXC)
设计说明
Do not treat the catalog description as proof that a candidate is a true drop-in replacement. The verified alternatives share the 100-TQFP package designation, but package equality alone does not establish pin, register, timing, or firmware equivalence. Compare the complete manufacturer datasheets, revision notes, USB descriptors, ATA timing, and power rails before substituting CY7C68321C-100AXC, CY7C68321C-56LTXC, or CY7C68320C-56LTXC into an existing design.
Design the supply for the confirmed 3.15 V to 3.45 V operating range and verify the USB and ATA transceiver requirements separately from the manufacturer datasheet. The supplied snippets do not identify core and I/O voltage domains, quiescent current, load current, or power sequencing. Add local bulk and high-frequency bypass capacitance according to the reference schematic, and verify startup, suspend, reset, and hot-plug behavior with the attached ATA device.
Route USB and ATA signals on controlled-impedance layers with short paths and appropriate return-plane continuity. The bridge supports USB 2.0 at up to 480 Mbps and can place the ATA bus in a high-impedance state, so connector, cable, protection, and bus-release timing require careful validation. Use the manufacturer reference layout and pin names as the authority because individual pin assignments are not available in the supplied catalog snippets.
合规信息
The supplied verified data does not state compliance status for CY7C68321-100AXC. A search result mentions RoHS and halogen-free information for CY7C68321C-100AXC, but those statements were not applied to the target without an authoritative source.
