Specifications

MCP1660-W0xxEyy QSFP-DD DAC Cable Product Specifications

Absolute maximum ratings are those beyond which damage to the device may occur.

Prolonged operation between the operational specifications and absolute maximum ratings is not intended and may cause permanent device degradation.

Parameter

Min

Max

Units

Supply voltage

-0.3

3.6

V

Data input voltage

-0.3

3.6

V

Control input voltage

-0.3

3.6

V

Parameter

Min

Max

Units

Storage temperature

-40

85

°C

This section shows the range of values for normal operation.

Parameter

Min

Typ

Max

Units

Supply voltage (Vcc)

3.135

3.3

3.465

V

Power consumption

---

---

0.1

W

Operating case temperature

0

70

°C

Operating relative humidity

5

85

%

Parameter (per lane)

Min

Typ

Max

Units

Characteristic Impedance

90

100

110

Ω

Time propagation delay1

---

---

4.5

ns/m

1 Informative

Warning

Note: Minimum insertion loss for up to 1m cable length is 6dB @ 12.89GHz.

QSFP-DD Memory Map I2C Address A0h

Page 00h/
Dec. Byte Address

Register Name

Description

0

Identifier

18h: QSFP-DD

1

Version ID

28h: Version of QSFP-DD Serial Module Specification.

86

Electrical Interface Code

1Dh: 400G CR8 PAM4 channel

87

Interface Advertising Code

01h: Copper cable

88

Host/Media Lane Count

88h: 8 host electrical lanes and 8 module media lanes

89

Lane Assignment

01h: Permissible first lane for application: lane 1

128

Identifier

18h: QSFP-DD

129-144

Vendor name

Mellanox: ASCII

145-147

Vendor OUI

00-02-C9: Mellanox OUI.

148-163

Part number

MCP1660-W0xxEyy: Part number per backshell label (ASCII)

164-165

Product revision

ZZ: Revision per backshell label (ASCII)

166-181

Serial number

Serial number on backshell label (ASCII).

182-187

Date code

YYMMDD: Year YY, month MM, day DD.

202

Length

b7 – b6: Multiplier for value in bits 5-0:

00 = multiplier of 0.1

01 = multiplier of 1

10 = multiplier of 10

11 = multiplier of 100

b5 – b0: Link length base value in meters. To calculate actual link length use multiplier in bits 7-6.

Examples:

1m: 41h

2.5m: 19h

204

Attenuation 5GHz

Typical attenuation measured during production test, in 1dB. [dB]

205

Attenuation 7GHz

206

Attenuation 12.9GHz

207

Attenuation 25.8GHz

Cable Mechanical Specifications

OPN

AWG

Single Cable Diameter

Minimum Bend Radius

Length (M)

Cable Color

MCP1660-W00AE30

30

7.1 ±0.35

Single bend: 35.5

Assembly/repeated bend: 71

0.5 ±0.025

Black

MCP1660-W001E30

1 ±0.025

MCP1660-W01AE30

1.5 ±0.025

MCP1660-W002E26

26

9.4 ±0.4

Single bend: 47

Assembly/repeated bend: 94

2 ±0.050

MCP1660-W02AE26

2.5 ±0.050

MCP1660-W003E26

3 ±0.050

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

image2022-4-28_20-50-55.png


Mechanical Dimensions

image2022-4-28_20-51-16.png

image2022-4-28_20-51-33.png


Cable Length Definition

image2022-4-28_20-52-14.png

*Ordered OPN length.

The following label is applied on the cable’s back-shell:

image2022-4-28_21-1-25.png

Warning

Images are for illustration purposes only. Product labels, colors, and lengths may vary.

Back-Shell Label Legend

Symbol

Meaning

Notes

SN – Serial Number

MT

Manufacturer name

2 characters, e.g. MT

YY

Year of manufacturing

2 digits

WW

Week of manufacturing

2 digits

XX

Manufacturer site

2 characters

SSSSS

Serial number

5 digits for serial number, starting from 00001. Reset at start of week to 00001.

Miscellaneous

ZZ

HW and SW revision

2 alpha-numeric characters

YYYY

Year of manufacturing

4 digits

MM

Month of manufacturing

2 digits

DD

Day of manufacturing

2 digits

COO

Country of origin

E.g. China or Malaysia

Quick response code

Serial number (MTYYWWXXSSSSS)

Copper Cable Jacket Label (Middle of Cable)

The following label is applied on the cable’s jacket:

image2022-4-28_21-6-40.png


Regulatory Compliance and Classification

  • Safety: CB, UL, CE

  • EMC: CE, FCC, ICES, RCM, VCCI

Ask your field engineer for a zip file of the certifications for this product.

FCC Class A Notice

Each of the devices complies with CFR47 FCC Class A Part 15 of the FCC Rules. Operation is subject to the following two conditions:

  1. This device may not cause harmful interference.

  2. This device must accept any interference received, including interference that may cause undesired

Note: 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 in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur during installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.

  • Increase the separation between the equipment and receiver.

  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

  • Consult the dealer or an experienced radio/television technician for help.

Modifications: Any modifications made to this device that are not approved by NVIDIA may void the authority granted to the user by the FCC to operate this equipment.

image2022-4-28_21-16-29.png


Handling Precautions and Electrostatic Discharge (ESD)

The cable is compatible with ESD levels in typical data center operating environments and certified in accordance with the standards listed in the Regulatory Compliance Section. The product is shipped with protective caps on its connectors to protect it until the time of installation. In normal handling and operation of high-speed cables and optical transceivers, ESD is of concern during insertion into the QSFP cage of the server/switch. Hence, standard ESD handling precautions must be observed. These include use of grounded wrist/shoe straps and ESD floor wherever a cable/transceiver is extracted/inserted. Electrostatic discharges to the exterior of the host equipment chassis after installation are subject to system level ESD requirements.

Cable Management Guidelines

It is important to follow the instructions and information detailed NVIDIA Cable Management Guidelines and FAQ Application Note to insure proper and optimal installation of this cable and avoid physical damage.

© Copyright 2023, NVIDIA. Last updated on Sep 3, 2023.