40G QSFP+ DIRECT ATTACH CABLE

HX40－QSFP+－DAC1 are compliant with the SFF-8436 specifications. Various choices of wire gauge are available from 30 to 26 AWG with various choices of cable length (up to 7m).

QSFP+ DAC Specifications
Number of Lanes	Tx & Rx
Channel Data Rate	10.3125 Gbps
Operating Temperature	0 to + 70°C
Storage Temperature	-40 to + 85°C
Supply Voltage	3.3 V nominal
Electrical Interface	38 pins edge connector
Management Interface	Serial, I2C

High Speed Characteristics

Parameter	Symbol	Min	Typ	Max	Units	Notes
Differential Impedance	Zd	90	100	110	Ω	–
Differential Input Return Loss	SDDXX	<-12+2* SQRT (f) with f in GHz	dB	0.01~4.1GHz
<-6.3+13*Log10/(f/5.5) with f in GHz	dB	4.1~11.1GHz
Common Mode Output Return Loss	SCCXX	< -7+1.6*f with f in GHz	dB	0.01~2.5GHz
–	–	-3	dB	2.5~11.1GHz
Difference Waveform Distortion Penalty	dWDPc	–	–	6.75	dB	–
VMA Loss	L	–	–	4.4	dB	–
VMA Loss to Crosstalk Ratio	VCR	32.5	–	–	dB	–

Regulatory Compliance

Feature	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

Low EMI radiation switches, servers and routers
Data center networks
Storage area networks
High performance computing
Telecommunication and wireless infrastructure
Medical diagnostics and networking

Test and measurement equipment

Recommended Operation Condition of 40G QSFP+ Direct Attach Cable

Parameter	Symbol	Min	Max	Unit
Operating Case Temperature	Topc	0	70	degC
Storage Temperature	Tst	-40	85	degC
Relative Humidity (non-condensation)	RS	35	60	%
Supply Voltage	VCC3	3.135	3.465	V
Voltage on LVTTL Input	Vilvttl	-0.3	VCC3 +0.2	V
Power Supply Current	ICC3		15	mA
Total Power Consumption	Pd	–	0.05	W

Notes: Stress or conditions exceed the above range may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not applied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.