On This Page
- Absolute Maximum Specifications
- Environmental Specifications
- Operational Specifications
- Electrical Specifications
- EEPROM Memory Map
- Mechanical Specifications
- Regulatory Compliance and Classification
- FCC Class A Notice
Absolute maximum ratings are those beyond which the device may be damaged.
Between the operational specifications and absolute maximum ratings, prolonged operation is not intended and permanent device degradation may occur.
Data input voltage
Control input voltage
This table shows the environmental specifications for the product.
This section shows the range of values for normal operation.
Supply voltage (Vcc)
Operating case temperature
Operating relative humidity
Time propagation delay
QSFP56 Memory Map I2C Address A0h
11h: QSFP28 side of the cable.
07h: Support for SFF-8436 Rev. 2.8
23h: Direct attach assemblies with no separable interfaces
Code for Serial Encoding Algorithm
Length in units of 1 m of direct attach copper cable.
According to SFF-8636 section 7.3.12 Length: “For modules with non-separable media interfaces, this field specifies the link length of the cable assembly (copper or AOC) in units of 1 meter. Link length is as specified in the INF-8074 specification. Link lengths less than 1 meter shall indicate 1 meter.”
A0h: Un-equalized copper cable (passive)
Extended Module Code Values
QSFP vendor IEEE number
00-02-C9: NVIDIA OUI.
MCP1650-XXXXXXX: Part number per backshell label (ASCII)
ZZ: Revision per backshell label (ASCII)
Typical attenuation in 1dB.
Max case temperature
46h: Support for 70ºC
40h: 50GBASE-CR, 100GBASE-CR2, or 200GBASE-CR4
MTYYWWXXSSSSS: Serial number per backshell label (ASCII). Refer to Backshell Label Legend table below.
YYMMDD: Year YY, month MM, day DD.
6Ah: Nominal bit rate per channel, units of 250 MBd.
Total cable length is the sum of byte 146 for number of meters and byte 236 for 0.1m.
DAC cable AWG information.
Single Cable Diameter
Minimum Bend Radius
Single bend: 35.5mm
Assembly/repeated bend: 71mm
Single bend: 47mm
Assembly/repeated bend: 94mm
The minimum assembly bending radius (close to the connector) is 10x the cable’s outer diameter. The repeated bend (far from the connector) is also 10x the cable’s outer diameter. The single bend (far from the connector) is 5x the cable’s outer diameter.
Assembly Bending Radius
Cable Length Definition
The following label is applied on the cable’s backshell:
Backshell Label Legend
PN – Part Number
American wire gauge
SN – Serial Number
2 characters MT
Year of manufacturing
Week of manufacturing
5 digits for serial number. Reset at start of week to 00001.
HW and SW revision
2 alpha-numeric characters
American wire gauge
Year 4 digits, month 2 digits, day 2 digits
Country of origin
Quick response code
The following label is applied on the cable’s jacket:
Cable Jacket Label (Middle of Cable)
Note: The serial number and barcode are for NVIDIA internal use only.
Safety: CB, UL, CE
EMC: CE, FCC, ICES, RCM, VCCI
Ask your NVIDIA FAE for a zip file of the certifications for this product.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.