接口&連接

隨著計算、存儲和通信應用領域信號速度的增加,系統設計人員面臨更大的信號完整性挑戰。 瑞薩電子的信號完整性產品組合可為常用的多千兆位每秒 IO 協議提供信號調節器,在長距離傳遞出色信號質量的同時通過減少電路板布局限制提供簡化設計。

瑞薩電子信號調節器的優勢:

  • 將電纜應用中的最長電纜長度延伸至 10 米以上、線路布局長度延長至 65 英寸以上
  • 通過使用更長的線路布局和電纜來加快系統設計時間
  • 盡可能降低比特誤碼率 (BER)

Download: IDT Signal Integrity Products Overview (PDF)

信號完整性挑戰

因受到發射器、接收器和信道特性影響,高速信號到達終端接收器時會弱化到不可接受的程度。 瑞薩電子的信號轉發器(信號調節器)專門設計用于解決上述問題,并可補償電纜和 PCB 走線衰減及 ISI 抖動,確保在目標接收器獲得最小的抖動量和最大的眼開度。 上述目標可通過增強所發射的信號、均衡所接收的信號,或在由于信道長度或由導通孔和連接器所產生的不連續性而導致單獨采取其中一項措施不足以實現時同時采取這兩項措施來實現。 此外,瑞薩電子重計時器可最大程度地減少隨機抖動,進一步提升信號質量。

瑞薩電子信號轉發器 IC(信號調節器)

信號轉發器 IC 的 瑞薩電子 SIP 系列包括對以下各項的支持: 5 Gbps PCI Express? (PCIe) Gen2、USB 3.0、6 Gbps SAS/SATA;6.25 Gbps Serial RapidIO? 2.1 和用于計算、存儲和通信應用的其他標準。 信號調理器結合了先進的接收均衡和發送去加重功能,以及可幫助 瑞薩電子客戶簡化設計和加快上市時間的診斷功能。 具體而言,這些器件可將較長的板上走線、背板走線和電纜連接到外部設備,以確保獲得最佳系統性能。 此外,瑞薩電子的信號轉發器 IC 包括信號損失 (LOS) 檢測和個別通道環回診斷功能,以及 2:1 復用/解復用功能。 器件支持通過 I2C、控制引腳或 EEPROM 配置的 2、4 或 8 個差分通道。 轉發器 IC 可提供省電模式以盡可能降低功耗。

瑞薩電子信號調節重計時器

瑞薩電子重計時器是行業首款完全符合 PCIe 3.0 規格的信號調節零件。 它們符合 PCIe 自動鏈接均衡規程,并可通過符合 PCIe 要求的擴展卡或主機總線適配器簡化系統設計和增強可靠性。 該信號調節器旨在提高信號完整性以超出最大 PCB 走線和電纜長度的兩倍。 這些器件可在將輸入信號發送至目標設備之前,盡可能減少輸入信號中的隨機性和確定性抖抖動。

瑞薩電子轉發器和重計時器是解決刀片服務器、企業存儲、通信系統以及云計算中信號完整性問題的理想選擇。

分類

PCI Express? Gen2 轉發器

針對要求苛刻的 2.5Gbps 至 5Gbps 應用優化信號轉發器

PCI Express? Gen3 重計時器

針對要求苛刻的 2.5Gbps、5Gbps 至 8Gbps 應用優化信號轉發器

SAS/SATA 6G 轉發器

針對要求苛刻的 1.5Gbps 至 6G 應用優化信號轉發器

Serial RapidIO? 2.1 轉發器

針對要求苛刻的 2.5Gbps 至 6.25Gbps 應用優化 RapidIO 信號轉發器

多協議轉發器

針對要求苛刻的 1.5Gbps 至 6G 應用優化信號轉發器

視頻和培訓

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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