TUSB212RWBR - USB 2.0 HS Signal Conditioner | Texas Instruments
料号： TUSB212RWBR ✓ 量产中TUSB212RWBR 概述
A USB signal conditioner is a specialized interface IC that improves an already transmitted USB differential signal without changing the protocol implemented by the USB host, hub, or peripheral. Its position in the signal path is between the transmitter and a lossy channel. This makes the TUSB212RWBR part of the broader USB interface hierarchy: USB 2.0 interface IC, signal conditioning IC, redriver, and ultimately a semiconductor-based connectivity device.
The principal feature of the TUSB212RWBR is programmable signal AC boost combined with DC boost. AC boost restores high-frequency signal amplitude lost through channel attenuation, while DC boost helps maintain the differential voltage required for reliable high-speed signaling. The manufacturer describes the implementation as patent pending and identifies USB On-The-Go compatibility as an additional design feature. Low-Speed and Full-Speed signal characteristics remain unaffected by the conditioning function.
TUSB212RWBR is intended for USB 2.0 systems where trace losses, connector transitions, cable segments, or routing discontinuities reduce High-Speed eye margin. Conditioning is normally applied to the D+ and D+ differential pair as a complete pair rather than to either conductor independently. The correction must be tuned from measured eye diagrams because excessive boost can increase edge distortion, jitter, or emissions instead of improving receiver recovery.
Typical deployments include USB hubs, cable assemblies, peripheral boards, host adapters, test equipment, and USB-to-storage or USB-to-network interfaces. In a hub, the conditioner can be placed near an upstream port so the signal entering a long cable is restored before attenuation becomes significant. In a peripheral, it can compensate for PCB routing from a connector to a USB controller.
When applying the device, preserve the USB differential impedance recommended by the manufacturer and keep the D+ and D+ routes coupled and symmetric. Decoupling and boost configuration should follow the manufacturer reference layout. Confirm compliance through eye-height, jitter, rise-time, and emissions measurements because channel length, connector geometry, and host behavior determine the useful correction amount.
This product page combines the manufacturer's USB 2.0 signal-conditioning description, exact TUSB212RWBR package information, extracted distributor pricing, and practical replacement analysis. It also distinguishes confirmed drop-in candidates from unsupported package or functional substitutions so engineers can make a PCB-level decision without relying on generic USB redriver recommendations.
直接替换替代料： TUSB212RWBR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TUSB214IRWBR
✅ 直接替换📋 参考替代料（不在目录中）
TUSB214IRWBT
✅ 直接替换📋 参考替代料（不在目录中）
TUSB212RWBR 规格参数
| Product Type | USB 2.0 High-Speed Signal Conditioner |
| Supported USB Speed | USB 2.0 High-Speed |
| Signal Compensation Function | Programmable AC boost and DC boost |
| Target Signal Distortion | Intersymbol interference from transmission-channel loss |
| Low-Speed Behavior | Unaffected by the High-Speed compensation |
| Full-Speed Behavior | Unaffected by the High-Speed compensation |
| USB On-The-Go Compatibility | Compatible |
| 封装 | 12-X2QFN (1.6 mm x 1.6 mm) |
| 安装类型 | Surface Mount |
| 引脚数量 | 12 pins |
| Production Data Marking | PRODUCTION DATA |
| Manufacturer Document Revision | Revision A, September 2017 |
| Maximum Data Rate | 480 Mb/s |
| RoHS 状态 | Compliant |
TUSB212RWBR 12-x2qfn (1.6 mm x 1.6 mm) 引脚配置指南
TUSB212RWBR（12-x2qfn (1.6 mm x 1.6 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： TUSB212RWBR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TUSB212RWBR 适用于 6 应用s: USB 2.0 Hub Port Conditioning, USB Docking-Station Interconnect, External USB Storage Adapter, USB-to-Network Adapter, USB Host and Peripheral Test Fixture, Camera and Imaging USB Link.
USB 2.0 Hub Port Conditioning
The TUSB212RWBR is suitable for conditioning a degraded USB 2.0 High-Speed differential pair at a hub port. Place the device near the connector or upstream transmitter so attenuation has not yet reached its maximum. Its programmable AC boost restores high-frequency content lost through routing, while DC boost helps maintain differential signal amplitude. This can improve receiver eye margin in long traces or connector-heavy designs, although the boost settings must be established from measured eye and jitter data rather than maximum correction.
推荐
USB Docking-Station Interconnect
A docking station combines connectors, internal cables, and long PCB routes that can introduce USB High-Speed loss. The TUSB212RWBR can be placed upstream of the affected connector to compensate for intersymbol interference using programmable AC and DC boost. Keeping the conditioner close to the transmitter limits the amount of degradation it must correct. Validate the implementation with the exact cable and display accessory because connector transitions and device wake behavior can materially change the usable eye margin.
推荐
External USB Storage Adapter
The TUSB212RWBR can compensate for High-Speed loss between a USB storage controller and a connector or internal cable in an external adapter. Its AC boost targets the high-frequency attenuation that closes the data eye, while DC boost supports differential signal amplitude. Place the conditioner on the transmitting side where channel loss remains manageable and confirm performance with eye-height, jitter, and compliance testing. The Low-Speed and Full-Speed paths remain unaffected by the High-Speed compensation function.
推荐
USB-to-Network Adapter
In a USB-to-network adapter, connector transitions and internal routing may reduce the usable USB 2.0 High-Speed eye before data reaches the Ethernet interface controller. The TUSB212RWBR can restore the affected differential pair with programmable AC and DC boost. It is especially useful where the PCB route between the USB connector and the host controller is lengthy or contains test points. Confirm pin assignments, reference layout, and USB compliance measurements against the manufacturer datasheet before release.
推荐
USB Host and Peripheral Test Fixture
The TUSB212RWBR can support a USB 2.0 test fixture that reproduces the losses of cables, connectors, and realistic board routing. Its programmable AC boost and DC boost allow controlled compensation while the fixture evaluates eye height, jitter, and data recovery. The device is useful when engineers need repeatable channel emulation without changing the transmitter. Because the conditioner affects High-Speed traffic, Low-Speed and Full-Speed enumeration tests should be run separately to verify that their signal characteristics remain unaffected.
推荐
Camera and Imaging USB Link
A camera or imaging peripheral can use the TUSB212RWBR when its USB High-Speed link shows degradation between an upstream connector and the device controller. The conditioner restores high-frequency signal content and differential amplitude, helping maintain a larger receiver eye across a lossy route. Place it close to the transmitter and keep the pair length matched. Because image-transfer errors can originate in both the data link and device firmware, confirm the physical improvement through eye and jitter measurements before attributing a performance gain solely to the signal conditioner.
推荐
推荐产品汇总
工程参考数据： TUSB212RWBR ——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 | TUSB214IRWBR | TUSB214IRWBT |
|---|---|---|---|
| Package | 12-X2QFN (1.6 mm x 1.6 mm) | 12-X2QFN (1.6 mm x 1.6 mm) | 12-X2QFN (1.6 mm x 1.6 mm) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Primary Function | USB 2.0 High-Speed signal conditioner | Texas Instruments USB interface solution | Texas Instruments USB interface solution |
| RoHS Compliance | Compliant | Compliant | Compliant |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
关键差异点
- Channel correction combines programmable AC boost with DC boost （对比 TUSB214IRWBR)
- Low-Speed and Full-Speed paths remain unaffected （对比 TUSB214IRWBT)
- USB On-The-Go compatibility is identified by the manufacturer （对比 TUSB214IRWBR)
设计说明
Treat D+ and D+ as one controlled-impedance differential pair. Place the TUSB212RWBR near the transmitter or port where attenuation begins, and minimize the distance between the device and the relevant connector or lossy channel. Use the manufacturer pin and reference-layout information for land patterns and avoid adding test pads or branch stubs that create discontinuities. Confirm improvement through eye-height and jitter measurements with the intended cable and peripheral attached.
Do not configure maximum AC and DC boost without measurement. Excessive high-frequency boost can alter edge rate, increase jitter, or create emissions even when a short test fixture appears to show a larger eye. Start from a conservative correction, then tune using the worst-case channel, host, device, temperature, and supply conditions. The manufacturer states that Low-Speed and Full-Speed behavior remains unaffected, so evaluate those speeds separately from the High-Speed compensation loop.
Use the manufacturer datasheet for the exact 12-X2QFN land pattern, exposed-pad connection, thermal vias, and supply-decoupling arrangement. The available 12-X2QFN package is only 1.6 mm by 1.6 mm, so solder mask, paste, and assembly capability should be reviewed before release. Keep the High-Speed route short and symmetrical, provide a continuous return path, and isolate any AC or DC boost configuration components from sensitive analog or clock circuitry.
USB High-Speed edge content can radiate even when functional data transfer passes. Maintain continuous reference planes, avoid split-plane transitions beneath the differential pair, and apply the manufacturer's recommended decoupling. After boost tuning, verify radiated and conducted emissions because improving the receive eye with excessive edge emphasis can increase electromagnetic noise. Use the same test arrangement for both eye analysis and emissions measurement.
合规信息
The exact-MPN distributor listing identifies the TUSB212RWBR as ROHS3 and RoHS compliant. No specific REACH, AEC-Q100, halogen-free, or conflict-minerals statement was confirmed for the target part. A comparison source reports RoHS and REACH compliance for the listed TUSB214 alternatives.
