接口&连接

随着计算、存储和通信应用领域信号速度的增加,系统设计人员面临更大的信号完整性挑战。 瑞萨电子的信号完整性产品组合可为常用的多千兆位每秒 IO 协议提供信号调节器,在长距离传递出色信号质量的同时通过减少电路板布局限制提供简化设计。

瑞萨电子信号调节器的优势:

  • 将电缆应用中的最长电缆长度延伸至 10 米以上、线路布局长度延长至 65 英寸以上
  • 通过使用更长的线路布局和电缆来加快系统设计时间
  • 尽可能降低比特误码率 (BER)

Download: IDT Signal Integrity Products Overview (PDF)

信号完整性挑战

因受到发射器、接收器和信道特性影响,高速信号到达终端接收器时会弱化到不可接受的程度。 瑞萨电子的信号转发器(信号调节器)专门设计用于解决上述问题,并可补偿电缆和 PCB 走线衰减及 ISI 抖动,确保在目标接收器获得最小的抖动量和最大的眼开度。 上述目标可通过增强所发射的信号、均衡所接收的信号,或在由于信道长度或由导通孔和连接器所产生的不连续性而导致单独采取其中一项措施不足以实现时同时采取这两项措施来实现。 此外,瑞萨电子重计时器可最大程度地减少随机抖动,进一步提升信号质量。

瑞萨电子信号转发器 IC(信号调节器)

信号转发器 IC 的 瑞萨电子 SIP 系列包括对以下各项的支持: 5 Gbps PCI Express® (PCIe) Gen2、USB 3.0、6 Gbps SAS/SATA;6.25 Gbps Serial RapidIO® 2.1 和用于计算、存储和通信应用的其他标准。 信号调理器结合了先进的接收均衡和发送去加重功能,以及可帮助 瑞萨电子客户简化设计和加快上市时间的诊断功能。 具体而言,这些器件可将较长的板上走线、背板走线和电缆连接到外部设备,以确保获得最佳系统性能。 此外,瑞萨电子的信号转发器 IC 包括信号损失 (LOS) 检测和个别通道环回诊断功能,以及 2:1 复用/解复用功能。 器件支持通过 I2C、控制引脚或 EEPROM 配置的 2、4 或 8 个差分通道。 转发器 IC 可提供省电模式以尽可能降低功耗。

瑞萨电子信号调节重计时器

瑞萨电子重计时器是行业首款完全符合 PCIe 3.0 规格的信号调节零件。 它们符合 PCIe 自动链接均衡规程,并可通过符合 PCIe 要求的扩展卡或主机总线适配器简化系统设计和增强可靠性。 该信号调节器旨在提高信号完整性以超出最大 PCB 走线和电缆长度的两倍。 这些器件可在将输入信号发送至目标设备之前,尽可能减少输入信号中的随机性和确定性抖抖动。

瑞萨电子转发器和重计时器是解决刀片服务器、企业存储、通信系统以及云计算中信号完整性问题的理想选择。

分类

PCI Express® Gen2 转发器

针对要求苛刻的 2.5Gbps 至 5Gbps 应用优化信号转发器

PCI Express® Gen3 重计时器

针对要求苛刻的 2.5Gbps、5Gbps 至 8Gbps 应用优化信号转发器

SAS/SATA 6G 转发器

针对要求苛刻的 1.5Gbps 至 6G 应用优化信号转发器

Serial RapidIO® 2.1 转发器

针对要求苛刻的 2.5Gbps 至 6.25Gbps 应用优化 RapidIO 信号转发器

多协议转发器

针对要求苛刻的 1.5Gbps 至 6G 应用优化信号转发器

视频和培训

IDT Signal Integrity Products - Repeaters for PCIe, USB, and SATA

Description

IDT provides a broad portfolio of active signal conditioner ICs.  These Repeaters support data rates up to 6.25Gbps and allow for reliable communication over long circuit board traces or across long cables. This video provides an introduction to IDT's Signal Integrity Product line, and shows a brief demonstration of PCIe 2.1, USB 3.0 and 6G SATA repeater capabilities.  Other protocols offered include 6G SAS, sRIO, XAUI and more. Presented by Ken Curt, Product Manager, Integrated Device Technology, Inc. Learn more at http://www.idt.com/go/SIP.

Transcript

Hello. Today I'd like to demonstrate IDT repeater signal integrity products. These repeaters are part of IDT's portfolio of active signal conditioning devices for multi gigabit per second serial protocols. Before we look at the demo, though, I'd like to review some basic concepts of signal integrity.
 
Multi-gigabit per second signals, as used in today's systems, degrade quickly when traveling across a PCB trace, often in just a few inches. Poor quality signals can result in a loss of system performance and even compromise reliability. 
 
IDT signal integrity products are specifically engineered to improve signal quality by eliminating jitter or noise and correcting for attenuation or loss. This results in better signal margins to ensure good signal communication and optimum system performance. 
 
Signal integrity devices are used in a wide variety of applications today, including servers, personal computers, telecom and storage systems, medical and electronic instrumentation and more. In a blade server system, for example, signals must cross from the host controller on a CPU board, across a backplane with multiple sets of connectors, and then to an IO board or another CPU board. Trace links can exceed 24 inches easily while cables of six meters are not uncommon going from chassis to chassis. At these distances, signal quality will be a problem, certainly a concern. 
 
Now, let's look at the demo system. At the bottom, here, it begins with a standard, off-the-shelf, small form factor desktop PC and motherboard. But, as you can see from this 28-inch stack of FR four-trace, the 15-meter PCI express cable, the seven meters of USB cable, and the six meters of SATA cable, our purpose, here, is to show the repeater capabilities, rather than how you would design a real system.
 
The five gigabit per second PCI Express Gen2 signals originate on the motherboard and pass through a connector set, then across this passive trace card, to an IDT PCI Express Gen2 repeater card. From that repeater card, they pass another passive trace card, to another IDT repeater card, and then over this long 15-meter cable, to another IDT repeater card, where they're received by a USB3 controller. 
 
From the USB3 controller, signals transfer across seven meters of cable, through an IDT USB3 repeater, and then to the hard disk drive here. 
 
This data channel, with its many segments and connectors is complex and electrically difficult. As a point of reference, PCI Express can typically support 16 inches of trace in one connector at five gigabits per second. Here, we've shown 28 inches of trace, almost twice as long, plus 15 meters of cable, and seven sets of connectors. 
 
Also in this demo, is a six gigabit per second SATA hard disk drive, attached with six meters of low cost SATA cable. 
 
On the monitor, we can see that the three hard disk drives are recognized, and the PCI Express link to the USB3 controller is running at the full five gigabit per second data rate.
 
The repeaters in this design allow this system to operate at full speed. IDT's repeaters are server-class products, because they offer comprehensive capabilities for signal optimization. To make this optimization easy, we provide a simple windows utility, with drop-down selection menus that allows parameters to be quickly changed. You can adjust receiver equalization, output swing and emphasis, the IO termination, and many other operating parameters. 
 
We provide example files for typical applications that can be loaded into the utility to begin your system evaluation, and then updated and saved when the signals are adjusted and optimum.
 
So, to conclude this demonstration, we've shown that IDT repeaters can support reliable five and six gigabit per second data transfers across complex channels for PC Express USB3, and six gigabit per second SATA. 
 
IDT offers signal conditioners for many popular protocols, including PCI Express, USB3, SATA, SAS, XAUI, SRIO, and more. Devices are available in various widths from two to 16 channels, and in package options from 20 QFN to 196 BGA. Most devices offer channel mux, demux, and loop-back capabilities. 
 
Well, thank you for watching this introduction to IDT signal integrity products. For more information, please contact IDT.
 

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