CEI-28G-VSR Channel Simulations, Validation, & Next Steps. Nathan Tracy and Mike Fogg May 18, 2010

Transcription

1 CEI-28G-VSR Channel Simulations, Validation, & Next Steps Nathan Tracy and Mike Fogg May 18, 21

2 Summary of Contribution Updated information showing Tyco Electronics 25/28Gbps first generation modular interconnect technology demonstrator Model of interconnect has been replaced with measured test data 1mm combined channel length 2mm combined channel length Market Feedback Latest Development Activity Second generation design approach Connector performance simulation Channel models

3 Channel Description 4 pair test derived model of connector and various length channels: 25mm, 75mm or 175mm long, Nelco 4-13SI on host side (x4) 25mm long, Nelco 4-13SI on module side (x4) 25, 75 or 175mm stripline 25, 75 or 175mm stripline 25, 75 or 175mm stripline 25, 75 or 175mm stripline Host Side Measured 4 pair connector model 25mm stripline 25mm stripline 25mm stripline 25mm stripline Module Side

4 Channel Details 25, 75 or 175mm of trace 1 Ohm differential traces (5-6-5 mil) 4-13SI dielectric material.39 thickness Layer 2 or layer 5 connect (top inner or bottom inner layer) 1 microvia Gen1 Concept connector 25mm of trace 1 Ohm differential traces (5-6-5 mil) 4-13SI dielectric material.39 thickness Layer 2 or layer 5 connect (top inner layer or bottom inner) 1 microvia

5 1 st Generation Concept Pin Numbering (P4) T23 (P3) T67 (P1) L23 (P2) L67

6 Channel Performance, 1mm Trace Length S DD21 (Insertion Loss) Insertion Loss, 75mm (host) 25mm (module) -5-1 db(sdd21_trace) db(sdd21_pair4) db(sdd21_pair3) db(sdd21_pair2) db(sdd21_pair1)

7 Channel Performance, 2mm Trace Length S DD21 (Insertion Loss) Insertion Loss, 175mm (host) 25mm (module) -5-1 db(sdd21_trace) db(sdd21_pair4) db(sdd21_pair3) db(sdd21_pair2) db(sdd21_pair1)

8 Channel Performance,1mm Trace Length S DD11 /S DD22 (Return Loss) S DD11 driven from host side S DD22 driven from module side Return Loss, 75mm (host) 25mm (module) db(sdd11_pair4) db(sdd11_pair3) db(sdd11_pair2) db(sdd11_pair1) db(sdd22_pair4) db(sdd22_pair3) db(sdd22_pair2) db(sdd22_pair1)

9 Channel Performance, 2mm Trace Length S DD11 /S DD22 (Return Loss) S DD11 driven from host side S DD22 driven from module side Return Loss, 175mm (host) 25mm (module) db(sdd11_pair4) db(sdd11_pair3) db(sdd11_pair2) db(sdd11_pair1) db(sdd22_pair4) db(sdd22_pair3) db(sdd22_pair2) db(sdd22_pair1)

10 Channel Performance, 1mm Trace Length FEXT: All pair combinations shown FEXT, 75mm (host) 25mm (module) -2-4 db(fext_t67_from_t23) db(fext_t67_from_l67) db(fext_t67_from_l23) db(fext_t23_from_t67) db(fext_t23_from_l67) db(fext_t23_from_l23) db(fext_l67_from_t67) db(fext_l67_from_t23) db(fext_l67_from_l23) db(fext_l23_from_t67) db(fext_l23_from_t23) db(fext_l23_from_l67)

11 Channel Performance, 2mm Trace Length FEXT: All pair combinations shown FEXT, 175mm (host) 25mm (module) -2-4 db(fext_t67_from_t23) db(fext_t67_from_l67) db(fext_t67_from_l23) db(fext_t23_from_t67) db(fext_t23_from_l67) db(fext_t23_from_l23) db(fext_l67_from_t67) db(fext_l67_from_t23) db(fext_l67_from_l23) db(fext_l23_from_t67) db(fext_l23_from_t23) db(fext_l23_from_l67)

12 Market Feedback From Gen1 Concept/Demo General Market Feedback: Connector electrical performance seems to be acceptable for SR and VSR channels General comment that concept doesn t meet port density requirements

13 Second Generation Concept Connector Detail Design accommodates Belly to Belly application Enables 18/36 ports in a 19 rack New generation connector All modeling includes any vias, antipads and solder pads for necessary connector application

14 2nd Generation Concept Differential Impedance 12 TDR - Differential, 2ps 11 Impedance (Ohms) time, nsec Red Pair style A Blue Pair style B

15 2 nd Generation Concept, 1mm Channel Insertion Loss Insertion Loss (SDD21), All Pairs, Quattro 2 Insertion Loss (SDD21), All Pairs, 2 nd Generation db(sdd21_pair1) db(sdd21_pair2) db(sdd21_pair3) db(sdd21_pair4) db(sdd21_trace)

16 2 nd Generation Concept, 2mm Channel Insertion Loss Insertion Loss (SDD21), All Pairs, All Pairs, 2 nd Generation Quattro 2-5 db(sdd21_pair1) db(sdd21_pair2) db(sdd21_pair3) db(sdd21_pair4) db(sdd21_trace)

17 2 nd Generation Concept, 1mm Channel Return Loss S DD11 (Return Loss) Return Loss (SDD11), All Pairs, All Pairs, 2 nd Generation Quattro 2-1 db(sdd11_pair1) db(sdd11_pair2) db(sdd11_pair3) db(sdd11_pair4)

18 2 nd Generation Concept, 2mm Channel Return Loss S DD11 (Return Loss) Return Loss (SDD11), All All Pairs, Pairs, 2 nd Generation Quattro 2-1 db(sdd11_pair1) db(sdd11_pair2) db(sdd11_pair3) db(sdd11_pair4)

19 2 nd Generation Concept 1mm Channel NEXT Near Near End End Crosstalk, All All Pairs, 2 Quattro nd Generation db(next_p4_from_p3) db(next_p4_from_p2) db(next_p4_from_p1) db(next_p3_from_p4) db(next_p3_from_p2) db(next_p3_from_p1) db(next_p2_from_p4) db(next_p2_from_p3) db(next_p2_from_p1) db(next_p1_from_p4) db(next_p1_from_p3) db(next_p1_from_p2)

20 2 nd Generation Concept 2mm Channel NEXT Near Near End End Crosstalk, Crosstalk, All All Pairs, Pairs, 2 Quattro nd Generation db(next_p4_from_p3) db(next_p4_from_p2) db(next_p4_from_p1) db(next_p3_from_p4) db(next_p3_from_p2) db(next_p3_from_p1) db(next_p2_from_p4) db(next_p2_from_p3) db(next_p2_from_p1) db(next_p1_from_p4) db(next_p1_from_p3) db(next_p1_from_p2) Near End Crosstalk, All Pair, 2 nd Generation

21 2 nd Generation Concept 1mm FEXT Far Far End End Crosstalk, All All Pairs, Pairs, 2 nd Quattro2 Generation -2-4 db(fext_p4_from_p3) db(fext_p4_from_p2) db(fext_p4_from_p1) db(fext_p3_from_p4) db(fext_p3_from_p2) db(fext_p3_from_p1) db(fext_p2_from_p4) db(fext_p2_from_p3) db(fext_p2_from_p1) db(fext_p1_from_p4) db(fext_p1_from_p3) db(fext_p1_from_p2)

22 2 nd Generation Concept 2mm Channel FEXT Far End Crosstalk, All Pairs, 2 Quattro2 nd Generation -2-4 db(fext_p4_from_p3) db(fext_p4_from_p2) db(fext_p4_from_p1) db(fext_p3_from_p4) db(fext_p3_from_p2) db(fext_p3_from_p1) db(fext_p2_from_p4) db(fext_p2_from_p3) db(fext_p2_from_p1) db(fext_p1_from_p4) db(fext_p1_from_p3) db(fext_p1_from_p2)

23 Integrated Crosstalk Noise (ICN) Completed investigation into ICN Matlab.m file is complete Calculates ICN, ICR, MDFEXT, MDNEXT Results have been checked against Adam Healey s Excel File 1 Calculated Integrated Crosstalk, 2Quattro nd Gen. Concept 2.1 and QSFP and QSFP ICN Quattro 2 nd Gen. 2.1 Concept ICN QSFP Proposed Limit 1Gbps RMS ICN, Millivolts Frequency, GHz

24 ICN Calculations comparison between products including 4-13si trace effects Initial QSFP with 2mm of trace 3.8mV(rms, 1.3Gbps) 5.2mV(rms, 24Gbps) 5.2mV(rms, 28Gbps) 1 st Gen. Concept with 2mm of trace 2.2mV(rms, 1.3Gbps) 2.7mV(rms, 24Gbps) 3.3mV(rms, 28Gbps) 2 nd Gen. Concept with 2mm of trace.8mv(rms, 1.3Gbps) 1.2mV(rms, 24Gbps) 1.3mV(rms, 28Gbps) 2 nd Gen. Concept with 1mm of trace 1.6mV(rms, 28Gbps) Magnitude (db) Magnitude (db) In-Row FEXT QSFP, 1st Gen. Concept In-Row FEXT nd Gen. Concept

25 Summary A first generation technology demonstrator 28Gb/s connector has been simulated, built and tested 28Gb/s modeled-to-measured performance has been validated A second generation connector concept has been developed Performance shows improvement over first generation demonstrator Port to port density allows 18/36 ports in a 19 rack Prototypes in process