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INTERCONNECT APPLICATION NOTE STRADA Whisper 3.9mm 100-Ohm Pair-In-Row Vertical Header Connector Routing Guide Report # 35GC007 05/16/2016 Rev 1.0 STRADA Whisper 3.9mm Vertical Header Connector  Copyright 2015 TE Connectivity, Harrisburg, PA All Rights Reserved Information is TE Confidential & Proprietary. Do Not Reproduce or Distribute Circuits & Design Report #35GC007 Rev 1.0 STRADA Whisper 3.9mm “Pair-In-Row” Vertical Header Connector Routing Guide Table of Contents Item Page # I. INTRODUCTION..........................................................................................................3 II. CONNECTOR OVERVIEW: STRADA WHISPER .................................................3 A. Background ................................................................................................................3 1. Features ................................................................................................................4 2. Applications .........................................................................................................4 B. Typical Implementations ...........................................................................................4 1. Right-Angle Differential ......................................................................................4 III. CONNECTOR DEFINITION ......................................................................................5 A. BACKPLANE FOOTPRINTS ..................................................................................5 1. Drilled Hole Dimensions .....................................................................................6 2. Fabrication Technology .......................................................................................6 3. High Speed Via Design ........................................................................................10 IV. ROUTING ......................................................................................................................11 A. BACKPLANE ROUTING.........................................................................................11 1. Routing Channels .................................................................................................11 2. 45-Degree Routing ...............................................................................................12 3. Escape Routing ....................................................................................................13 4. Layer Count Analysis ..........................................................................................14 5. Layer Specific Routing ........................................................................................15 V. GENERAL ......................................................................................................................17 A. Pinout Recommendation ............................................................................................17 B. Example Stackups and Material Characteristics ........................................................17 C. Recommended Routing Techniques ..........................................................................18 1. Right-angle Bends ................................................................................................18 VI. PART PLACEMENT ....................................................................................................18 VII. ADDITIONAL INFORMATION .................................................................................18 A. Gigabit Research and General Application Notes .....................................................18 B. Electrical Models .......................................................................................................18 C. Website ......................................................................................................................18 VIII. CONTACT INFORMATION .......................................................................................18 TE Connectivity Circuits & Design PAGE 2 Information is TE Confidential & Proprietary. Do Not Reproduce or Distribute 07/13/2015 Circuits & Design Report #35GC007 Rev 1.0 STRADA Whisper 3.9mm “Pair-In-Row” Vertical Header Connector Routing Guide STRADA Whisper Connector Routing I. INTRODUCTION As engineers design systems that attempt to push serial speeds across backplane environments in the tens of gigabits per second range, the selection of the system’s electrical connector becomes more significant. Electrical, mechanical, and manufacturing aspects of the connector must be considered simultaneously. At the board level these aspects combine with common board design practices to influence the design of the connector-to-board interface and how the board itself will be routed. The manner in which the connector is designed into the system can significantly impact the system’s intended performance. TE has been actively researching these areas in an effort to help customers use the STRADA Whisper connector in multi-gigabit serial systems. The combination of interconnect research and intimate knowledge of the connector is presented to provide insight into the capability of a STRADA Whisper-based system design. Furthermore, this document provides specific design recommendations that will address layout, electrical performance, and manufacturability tradeoffs of the connector at the board level. II. CONNECTOR OVERVIEW: STRADA WHISPER A. BACKGROUND Figure 1: STRADA Whisper Vertical Header Connector TE Connectivity Circuits & Design PAGE 3 Information is TE Confidential & Proprietary. Do Not Reproduce or Distribute 07/13/2015 Circuits & Design Report #35GC007 Rev 1.0 STRADA Whisper 3.9mm “Pair-In-Row” Vertical Header Connector Routing Guide The STRADA Whisper connector is the first of the next generation of high speed backplane interconnects offered by TE. A revolutionary performance upgrade is a result of the extremely low noise characteristics of the individually shielded pairs which provide improved signal integrity and EMI performance over competitive products. The in-row “horizontal” pair orientation enables the STRADA Whisper connector to have zero intra-pair skew. 1. FEATURES  56 Gb/s performance  Individual shielded pairs facilitate excellent signal integrity and EMI performance  Connector noise