Ascent Communication Technology

200G QSFP56 to 2x100G QSFP56 DAC

The 200G QSFP56 to 2x100G QSFP56 Direct Attach Copper Cable assembly features eight differential copper pairs, delivering four data transmission channels at speeds of up to 56 Gbps (PAM4) per channel. It meets the requirements for 200G Ethernet and InfiniBand High Data Rate (HDR) applications. This 200G cable assembly supports various wire gauges ranging from 26AWG to 30AWG and offers low insertion loss and minimal crosstalk. By utilizing PAM4 signaling, QSFP56 effectively doubles data transmission rates, though it demands stricter cable insertion loss specifications. For more information, please refer to the High-Speed Characteristics guidelines. Designed for high-speed and reliable connections in data centers, networking, and telecommunications, this next-generation product maintains compatibility with the QSFP+ form factor, ensuring backward compatibility with existing QSFP ports.

· Compatible with IEEE 802.3bj and IEEE 802.3cd

· In accordance with the paging function in the protocol SFF-8636, paging can be selected 00H or 02H in

127 bytes (page02 only supported by MCU type cable)

· Supports aggregate data rates of 200Gbps(PAM4)

· Optimized construction to minimize insertion loss and cross talk

· Backward compatible with existing QSFP+ connectors and cages

· Pull-to-release slide latch design

· 26AWG through 30AWG cable

· Straight and break out assembly configurations available

· Customized cable braid termination limits EMI radiation

· Customizable EEPROM mapping for cable signature

· Operating temperature: 0°C to 70°C

· Single 3.3V power supply

· RoHS Compatible

High Speed Characteristics

Parameter	Symbol	Min	Typ.	Max	Unit	Note
Differential Impedance	TDR	90	100	110	Ω
Insertion Loss	SDD21	-17.16			dB	At 13.28 GHz
Differential Return Loss	SDD11			See 1	dB	At 0.05 to 4.1 GHz
	SDD22			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			See 3	dB	At 0.01 to 12.89 GHz
	SCD22			See 4	dB	At 12.89 to 19 GHz
Differential to Common Mode Conversion Loss	SCD21-IL			-10	dB	At 0.01 to 12.89 GHz
	SCD21-IL			See 5	dB	At 12.89 to 15.7 GHz
	SCD21-IL			-6.3	dB	At 15.7 to 19 GHz

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

Regulatory Compliance

Feature	Reference	Performance
Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883C Method 3015.7	Class 1(>2000 Volts)
Electrostatic Discharge (ESD) to the Electrical Pins
Electromagnetic Interference (EMI)	FCC Class B	Compatible with standards
	CENELEC EN55022 Class B
	CISPR22 ITE Class B
RF Immunity(RFI)	IEC61000-4-3	Typically Show no Measurable from
		Effect from a 10V/m Field Swept
		80 to 1000MHz
RoHS Compliance	RoHS Directive 2011/65/EU and it's Amendment Directives （EU） 2015/863	RoHS （EU）2015/863 compliant


REACH Compliance	REACH Regulation (EC) No 1907/2006	REACH (EC) No 1907/2006 compliant
	REACH Regulation (EC) No 1907/2006	REACH (EC) No 1907/2006 compliant