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QSFP28 100Gb/s to 4 SFP28 Direct Attached Cable
  • QSFP28 100Gb/s to 4 SFP28 Direct Attached Cable

QSFP28 100Gb/s to 4 SFP28 Direct Attached Cable

Intcera’s QSFP28 to 4 SFP28 passive copper cable assembly feature eight differential copper pairs, providing four data transmission channels at speeds up to 28Gbps per channel, and meets 100G Ethernet,25G Ethernet and InfiniBand Enhanced Data Rate (EDR) requirements. Available in a broad range of wire gages-from 26AWG through 30AWG-this 100G copper cable assembly features low insertion loss.

Product description

PRODUCT FEATURES

•Supports aggregate data rates of 100Gbps
•Backward compatible with QSFP28 port
•Compatible with IEEE 802.3bj, IEEE 802.3by
•Compliant with InfiniBand EDR
•Compliant with SFF-8665 and SFF-8636
•Operating temperature: 0~70℃
•Single 3.3V power supply
•Lower total system power solution
•Lower total system EMI solution
•RoHS compliant

APPLICATIONS

•100G Ethernet and InfiniBand EDR
•InfiniBand EDR
•Switches, servers and routers
•Storage area networks

PRODUCT DESCRIPTION

Intcera’s QSFP28 to 4 SFP28 passive copper cable assembly feature eight differential copper pairs, providing four data transmission channels at speeds up to 28Gbps per channel, and meets 100G Ethernet,25G Ethernet and InfiniBand Enhanced Data Rate (EDR) requirements. Available in a broad range of wire gages-from 26AWG through 30AWG-this 100G copper cable assembly features low insertion loss.

Ordering Information

Part Number

Description
QP1H4X-DP1M30WG 100G QSFP28 to 4 SFP28 DAC passive cable 30AWG 1m
QP1H4X-DP2M30WG 100G QSFP28 to 4 SFP28 DAC passive cable 30AWG 2m
QP1H4X-DP3M26WG 100G QSFP28 to 4 SFP28 DAC passive cable 26AWG 3m
QP1H4X-DP5M26WG 100G QSFP28 to 4 SFP28 DAC passive cable 26AWG 5m 

High Speed Characteristics

Parameter

Symbol

 Min

Typical

 Max

Unit

Note

Differential Impedance

TDR

90

100

110

     ohm  

Insertion loss

SDD21

8

  

22.48

dB

At 12.8906 GHz

Differential Return Loss

SDD11

SDD22

12.45

   See 1

dB

At 0.05 to 4.1 GHz

3.12

 

 See 2

dB

At 4.1 to 19 GHz

Common-mode to common-mode output return loss

SCC11

SCC22

2

    

dB

At 0.2 to 19 GHz

Differential to common-mode

return loss

SCD11

SCD22

12

   See 3

dB

At 0.01 to 12.89 GHz

10.58

   See 4

At 12.89 to 19 GHz

Differential to common Mode

Conversion Loss

SCD21-IL

10

 

  

dB

At 0.01 to 12.89 GHz
    See 5

At 12.89 to 15.7 GHz

6.3

 

 

At 15.7 to 19 GHz

Channel Operating Margin

COM

3

    

dB

  
Notes:

  1. Reflection Coefficient given by equation SDD11(dB) < 16.5 - 2 × SQRT(f ), with f in GHz
  2. Reflection Coefficient given by equation SDD11(dB) < 10.66 - 14 × log10(f/5.5), with f in GHz
  3. Reflection Coefficient given by equation SCD11(dB) < 22 - (20/25.78)*f, with f in GHz
  4. Reflection Coefficient given by equation SCD11(dB) < 15 - (6/25.78)*f, with f in GHz
  5. Reflection Coefficient given by equation SCD21(dB) < 27 - (29/22)*f, with f in GHz

 

Pin Descriptions

SFP28 Pin Function Definition

Pin

Logic

Symbol

Name/Description

Notes

1

  

VeeT

Transmitter Ground

  

2

LV-TTL-O

TX Fault

N/A

1

3

LV-TTL-I

TX_DIS

Transmitter Disable

2

4

LV-TTL-I/O

SDA

Tow Wire Serial Data

  

5

LV-TTL-I

SCL

Tow Wire Serial Clock

  

6

  

MOD_DEF0

Module present, connect to VeeT

  

7

LV-TTL-I

RS0

N/A

1

8

LV-TTL-O

LOS

LOS of Signal

2

9

LV-TTL-I

RS1

N/A

1

10

  

VeeR

Receiver Ground

  

11

  

VeeR

Receiver Ground

  

12

CML-O

RD-

Receiver Data Inverted

  

13

CML-O

RD+

Receiver Data Non-Inverted

  

14

  

VeeR

Receiver Ground

  

15

  

VccR

Receiver Supply 3.3V

  

16

  

VccT

Transmitter Supply 3.3V

  

17

  

VeeT

Transmitter Ground

  

18

CML-I

TD+

Transmitter Data Non-Inverted

 

19

CML_I

TD-

Transmitter Data Inverted

 

20

 

VeeT

Transmitter Ground

 

1.

 Signals not supported in SFP+ Copper pulled-down to VeeT with 30K ohms resistor  

2.

 Passive cable assemblies do not support LOS and TX_DIS  
a

QSFP28 Pin Function Definition

Pin Logic Symbol Description
1   GND Ground
2 CML-I Tx2n Transmitter Inverted Data Input
3 CML-I Tx2p Transmitter Non-Inverted Data Input
4   GND Ground
5 CML-I Tx4n Transmitter Inverted Data Input
6 CML-I Tx4p Transmitter Non-Inverted Data Input
7   GND Ground
8 LVTTL-I ModSelL Module Select
9 LVTTL-I ResetL Module Reset
10   Vcc Rx +3.3V Power Supply Receiver
11 LVCMOS- SCL 2-wire serial interface clock
I/O
12 LVCMOS- SDA 2-wire serial interface data
I/O
13   GND Ground
14 CML-O Rx3p Receiver Non-Inverted Data Output
15 CML-O Rx3n Receiver Inverted Data Output
16   GND Ground
17 CML-O Rx1p Receiver Non-Inverted Data Output
18 CML-O Rx1n Receiver Inverted Data Output
19   GND Ground
20   GND Ground
21 CML-O Rx2n Receiver Inverted Data Output
22 CML-O Rx2p Receiver Non-Inverted Data Output
23   GND Ground
24 CML-O Rx4n Receiver Inverted Data Output
25 CML-O Rx4p Receiver Non-Inverted Data Output
26   GND Ground
27 LVTTL-O ModPrsL Module Present
28 LVTTL-O IntL Interrupt
29   Vcc Tx +3.3V Power supply transmitter
30   Vcc1 +3.3V Power supply
31 LVTTL-I LPMode Low Power Mode
32   GND Ground
33 CML-I Tx3p Transmitter Non-Inverted Data Input
34 CML-I Tx3n Transmitter Inverted Data Input
35   GND Ground
36 CML-I Tx1p Transmitter Non-Inverted Data Input
37 CML-I Tx1n Transmitter Inverted Data Input
38   GND Ground

a

Mechanical Specifications

a

  Regulatory Compliance

Item Test Method Performance
Electrostatic Discharge (ESD) to the Electrical Pins  

MIL-STD-883C Method 3015.7

  

Class 1(>2000 Volts)
Electromagnetic Interference(EMI) FCC Class B Compliant with Standards
CENELEC EN55022 Class B
CISPR22 ITE Class B
 

RF Immunity(RFI)

  

IEC61000-4-3

 Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz
RoHS Compliance RoHS Directive 2011/65/EU and it's Amendment Directives 6/6 RoHS 6/6 compliant

Appendix A. Document Revision

Version No. Date Description
1.0 2018-3-1 Preliminary datasheet 
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