# 400G QSFP112 Direct Attach Cable (DAC)  NDR

## **![](https://cdn.shopify.com/s/files/1/0758/0362/3703/files/dfttelecom01.jpg?v=1786790857)**

## **General** **Description**

QSFP112 passive copper cable assembly feature eight differential copper pairs, providing four data transmission channels at speeds up to 100Gbps(PAM4) per channel, and meets 400G Ethernet and InfiniBand Next Data Rate(NDR) requirements. Available in 26AWG and 30AWG wire gauges, this 400G copper cable assembly features low insertion loss and low crosstalk.

QSFP112 passive copper cable uses PAM4 signals for transmission, which doubles the rate. However, there are more stringent requirements for cable insertion loss. For detailed requirements, please see High Speed Characteristics.

## **Features** **and Benefits**

l Compatible with IEEE 802.3ck

l Supports aggregate data rates of 400Gbps(PAM4)

l Optimized construction to minimize insertion loss and crosstalk

l Pull-to-release slide latch design

l Straight and break out assembly configurations available

l Customized cable braid termination limits EMI radiation   

l Customizable EEPROM mapping for cable signature

l 26AWG and 30AWG cable

l 3.3V Power supply

l Temperature Range: 0~ 70 °C

l RoHS Compliant

## **Product** **Applications**

**.**Switches, servers and routers

**.**Data Center networks

**.**Storage area networks

**.**High performance computing

 **.**Telecommunication and wireless infrastructur

**.**Medical diagnostics and networking

 **.**Test and measurement equipment

## **Industry Standards**

**.**400G Ethernet(IEEE 802.3ck)

**.** InfiniBand NDR

## **Pin Descriptions**

QSFP112 Pin Function Definition

**Pin**

**Logic**

**Symbol**

**Description**

1

GND

Ground

2

CML-I

Tx2n

Transmitter Inverted Data Input

3

CML-I

Tx2p

Transmitter Non-Inverted Data Input

4

GND

Ground

5

CML-I

Tx4n

Transmitter Inverted Data Input

6

CML-I

Tx4p

Transmitter Non-Inverted Data Input

7

GND

Ground

8

LVTTL-I

ModSelL

Module Select

9

LVTTL-I

ResetL

Module Reset

10

Vcc Rx

+3.3V Power Supply Receiver

11

LVCMOS- I/O

SCL

2-wire serial interface clock

12

LVCMOS- I/O

SDA

2-wire serial interface data

13

GND

Ground

14

CML-O

Rx3p

Receiver Non-Inverted Data Output

15

CML-O

Rx3n

Receiver Inverted Data Output

16

GND

Ground

17

CML-O

Rx1p

Receiver Non-Inverted Data Output

18

CML-O

Rx1n

Receiver Inverted Data Output

19

GND

Ground

20

GND

Ground

21

CML-O

Rx2n

Receiver Inverted Data Output

22

CML-O

Rx2p

Receiver Non-Inverted Data Output

23

GND

Ground

24

CML-O

Rx4n

Receiver Inverted Data Output

25

CML-O

Rx4p

Receiver Non-Inverted Data Output

26

GND

Ground

27

LVTTL-O

ModPrsL

Module Present

28

LVTTL-O

IntL

Interrupt

29

Vcc Tx

+3.3V Power supply transmitter

30

Vcc1

+3.3V Power supply

31

LVTTL-I

LPMode

Low Power Mode

32

GND

Ground

33

CML-I

Tx3p

Transmitter Non-Inverted Data Input

34

CML-I

Tx3n

Transmitter Inverted Data Input

35

GND

Ground

36

CML-I

Tx1p

Transmitter Non-Inverted Data Input

37

CML-I

Tx1n

Transmitter Inverted Data Input

38

GND

Ground

 ![](https://cdn.shopify.com/s/files/1/0758/0362/3703/files/1_e6916a90-d8b3-456a-b29e-6350b21d5b86.png?v=1786790419)

**General** **Product** **Characteristics**

**QSFP112 DAC** **Specifications**

Number of Lanes

Tx4 Rx4

Channel Data Rate

106\. 25Gbps

Operating Temperature

0 to + 70°C

Storage Temperature

\-40 to + 85°C

Supply Voltage

3.3 V nominal

Electrical Interface

38pins edge connector

Management Interface

Serial, I2C

## **High Speed Characteristics**

Parameter

Symbol

Min

Typical

Max

Unit

Note

Differential Impedance

TDR

90

100

110

Ώ

Insertion loss

SDD21

\-19.75

dB

At 26.56 GHz

Differential Return Loss

SCD11

SCD22

See 1

dB

At 0.05 to 26.56GHz

See 2

dB

At 26.56 to 40 GHz

Common-mode to common-mode output return loss

SCC11

SCC22

\-1.8

dB

At 0.2 to 40GHz

Differential to common Mode

Conversion Loss

SCD21- SDD21

\-10

dB

At 0.05 to 12.89 GHz

See3 

At 12.89 to 40 GHz

Notes:

1. Reflection Coefficient given by equation SCD11(dB) <22-10(f/26.56), with f in GHz

2. Reflection Coefficient given by equation SCD11(dB) <15-3(f/26.5), with f in GHz

3. Reflection Coefficient given by equation SCD21\-CDD21(dB) < 14-0.3108\*f, with f in GHz

**Mechanical** **Specifications**

The connector is compatible with the SFF8672 specification.

 ![](https://cdn.shopify.com/s/files/1/0758/0362/3703/files/2_fddc2cc0-0a71-4016-9e5c-c674f5071801.png?v=1786790479)

Length (m)

Cable AWG

L≤1M

30

1M＜L≤2M

26

## **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 （EU） 2015/863

RoHS （EU）2015/863 compliant

REACH Compliance

REACH  Regulation (EC) No 1907/2006

REACH (EC) No 1907/2006 compliant

## Details

- **Price:** 0.0 USD
- **Vendor:** DFT TELECOM
- **Type:** 通信
- **Tags:** 400G, 800G, dfttelecom, Nvidia, optic module

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.00 USD | In stock |

## Images

- 400G QSFP112 Direct Attach Cable (DAC)  NDR

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> Source: [DFT TELECOM ](https://dfttelecom.com/products/400g-qsfp112-direct-attach-cable-dac-ndr)
> Updated: 2026-08-15