Ascent Communication Technology

QSFP56 200G DAC 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
Differential Return Loss	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
Differential to Common‑Mode Return Loss	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