A P P L I C A T I O N B R I E F

Physical Test Data for COM Express Tyco Electronics 0.5mm Free Height Connector

8mm Stack Height

This document provides the testing data gathered for PICMG’s

COM Express implementation of the 0.5mm FH connector, quantifying connector performance at PCI-Express Gen 1 & Gen 2 signaling rates, for both connector-only and system applications.

© Copyright 2009 Tyco Electronics, Harrisburg, PA All Rights Reserved

1

Tyco 0.5mm FH Connector

Measured Connector Data – 8mm Stack

2

0.5mm FH Evaluation System

Physical Measurement System Providing Various Connector-Only and System Testing Configurations

3

0.5mm FH Measurement Fixtures

Time-Domain & Frequency-Domain

Time-Domain Measurements

- Advantest D3186 Signal Generator

- Tektronix CSA8200 Signal Analyzer

Frequency-Domain Measurements

- Agilent 8720ES Network Analyzer

4

0.5mm FH Evaluation SystemConnector-Only Measurements

PCB Trace

0.5mm FH 8mm Stacking Connector PCB Trace

- Motherboard Thickness = 0.063”, Nelco 4000-6 Material

- Daughtercard Thickness = 0.063”, Nelco 4000-6 Material

- 8 mm Stack Height, Between Printed Circuit Boards

- Minimal PCB Effects; Optimized Layer Connections

- 27-1 PRBS for Eye Pattern Generation

5

0.5mm FH Impedance Profiles

Connector-Only Differential Impedance Measurements – Rows A & B2.5 Gbps (Gen1) & 5.0 Gbps (Gen2)

0.0

20.0

40.0

60.0

80.0

100.0

120.0

39.5 40.0 40.5 41.0 41.5 42.0 42.5Time (ns)

Impe

danc

e (O

hms)

Row A (50 ps)

Row B (50 ps)

Row A (28 ps)

Row B (28 ps)

6

0.5mm FH Propagation Delay

40 psPropagation Delay

Connector-Only Propagation Delay Measurements

0.5mm FH - 8mm Stack: Tprop = 40 ps

-0.05

0.00

0.05

0.10

0.15

0.20

0.25

0.30

41.00 41.05 41.10 41.15 41.20 41.25 41.30 41.35 41.40Time (ns)

Volta

ge (V

)

Calibration Thru

0.5mm FH Thru

7

0.5mm FH Crosstalk PinoutsSpecification & Measurement

Row A Row BA51 GND GND B51A52 Aggressor+ Quiet+ B52A53 Aggressor- Quiet- B53A54 VCC_5V_SBY VCC_5V_SBY B54A55 Aggressor+ Victim+ B55A56 Aggressor- Victim- B56A57 GND VCC_3V3 B57A58 Aggressor+ Quiet+ B58A59 Aggressor- Quiet- B59A60 GND GND B60

Row A Row BA51 GND GND B51A52 PCIE5_TX+ PCIE5_RX+ B52A53 PCIE5_TX- PCIE5_RX- B53A54 VCC_5V_SBY VCC_5V_SBY B54A55 PCIE4_TX+ PCIE4_RX+ B55A56 PCIE4_TX- PCIE4_RX- B56A57 GND VCC_3V3 B57A58 PCIE3_TX+ PCIE3_RX+ B58A59 PCIE3_TX- PCIE3_RX- B59A60 GND GND B60

Pinout Section from Draft Specification

Row A Row BA51 GND GND B51A52 Aggressor+ Quiet+ B52A53 Aggressor- Quiet- B53A54 VCC_5V_SBY VCC_5V_SBY B54A55 Victim+ Quiet+ B55A56 Victim- Quiet- B56A57 GND VCC_3V3 B57A58 Aggressor+ Quiet+ B58A59 Aggressor- Quiet- B59A60 GND GND B60

Pinout for NEXT Measurement Pinout for FEXT Measurement

8

0.5mm FH NEXT Measurement

Row A Row BA51 GND GND B51A52 Aggressor+ Quiet+ B52A53 Aggressor- Quiet- B53A54 VCC_5V_SBY VCC_5V_SBY B54A55 Aggressor+ Victim+ B55A56 Aggressor- Victim- B56A57 GND VCC_3V3 B57A58 Aggressor+ Quiet+ B58A59 Aggressor- Quiet- B59A60 GND GND B60

< 2.0 %

NEXTTr = 28 ps

< 1.0 %Total Worst-Case

Asynchronous Noise on B55/B56

NEXTTr = 50 ps

NEXT Pinout

NEXT Summary

FEXT Pinout

< 2.0 %

FEXTTr = 28 ps

< 1.0 %Total Worst-Case

Asynchronous Noise on A55/A56

FEXTTr = 50 ps

FEXT Summary

Row A Row BA51 GND GND B51A52 Aggressor+ Quiet+ B52A53 Aggressor- Quiet- B53A54 VCC_5V_SBY VCC_5V_SBY B54A55 Victim+ Quiet+ B55A56 Victim- Quiet- B56A57 GND VCC_3V3 B57A58 Aggressor+ Quiet+ B58A59 Aggressor- Quiet- B59A60 GND GND B60

9

-15.0

-13.0

-11.0

-9.0

-7.0

-5.0

-3.0

-1.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0Frequency (GHz)

Mag

nitu

de (d

B)

SDD21 Mag(dB)

0.5mm FH Insertion Loss Plot

Connector-Only Differential Insertion Loss Measurement

10

0.5mm FH Evaluation SystemSystem Measurements

3” & 6” PCB Trace

0.5mm FH 8mm Stacking Connector 3” & 6” PCB Trace

- Motherboard Thickness = 0.063”, Nelco 4000-6 Material

- Daughtercard Thickness = 0.063”, Nelco 4000-6 Material

- Trace Widths = 6 mils MB & DC; 100 Ω Differential Pairs

- Optimized Test Points; Bottom Layer Routing Connection

- 6” & 12” Total System Lengths

- 27-1 PRBS for Eye Pattern Generation

11

0.5mm FH Eye Patterns6” & 12” System Measurements

2.5 Gbps, 6” Total System LengthEye Opening: 84 %, Jitter: 14 ps

2.5 Gbps, 12” Total System LengthEye Opening: 74 %, Jitter: 26 ps

6.25 Gbps, 6” Total System LengthEye Opening: 67 %, Jitter: 16 ps

6.25 Gbps, 12” Total System LengthEye Opening: 49 %, Jitter: 29 ps