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QSFP-200DAC Cable

Ascent’s 200GE QSFP56 cable assemblies are high-performance, cost-effective I/O solutions for LAN, HPC and SAN. The high‑speed cable assemblies meet and exceed 200 Gigabit Ethernet, InfiniBand EDR and temperature requirements for performance and reliability. The cables are compliant with SFF-8436 specifications and provide connectivity between devices using QSFP ports.

•    QSFP56 conforms to the small form factor SFF8665

•    4-channel full-duplex passive copper cable transceiver

•    Low crosstalk

•    Maximum aggregate data rate: 200 Gb/s (4 x 50 Gb/s)

•    IEEE 802.3bj 200GEBASE-CR4

•    Copper link x (x=1m, 3m, 5m)

•    Support data rates: 50Gb/s PAM4 (per channel)

•    I2C based two-wire serial interface for EEPROM signature which can be customized

•    Power Supply: +3.3 V

•    Operating Temperature: 0 to +70 °C

•    RoHS Compliant


Recommended Operating Environment

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Storage Temperature


‑40


+85

°C


Operating Case Temperature

Tc

0


+70

°C


Power Supply Voltage

VCC3

3.14

3.3

3.47

V


Data Rate Per Lane


1


50

Gb/s


 

High Speed Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Unit

Note

Differential Impedance

RIN, P

90

200

110

Ω


Insertion Loss

SDD2

8


22.48

dB


Differential Return Loss

SDD11

12.45


See 1

dB


SDD22

3.12


See 2

dB


Common‑Mode to Common‑Mode Output Return Loss

SCC11, SCC22

2



dB


Differential to Common‑Mode Return Loss

SCD11

12


See 3

dB


SCD22

10.58


See 4

dB


Differential to Common Mode Conversion Loss

SCD21‑IL

10



dB


SCD21‑IL



See 5

dB


SCD21‑IL

6.3



dB


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 ‑ (20/50) * f, with f in GHz

4. Reflection Coefficient given by equation SCD11(dB) < 15 ‑ (6/50) * f, with f in GHz

5. Reflection Coefficient given by equation SCD21(dB) < 27 ‑ (29/22) * f, with f in GHz


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