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Quick Spec:

Part Number: QDD-400G-ZR4-A-FL QDD-400G-ZR4-EXT-A-FL QDD-400G-ZR4-IND-A-FL


Form Factor: QSFP-DD

TX Wavelength: 1310nm

Reach: 80km

Cable Type: SMF

Rate Category: 400GBase

Interface Type: ZR4

DDM: Yes

Connector Type: Dual-LC


Arista Compatible QDD-400G-ZR4-A-FL Features


Arista Compatible QDD-400G-ZR4-A-FL General Description

This product uses a 76-pin QSFP-DD MSA QSFP-DD Hardware Specification connector for all electrical interfaces with the host card, whereas the optical interfaces on the line side are provided through the optical receptacles on the QSFP-

DD. The module can be portioned into three functional parts: TX path, RX path and Control& Power block


The host interface is comprised of a total of 8 high-speed SerDes lanes. This allows module to support one interfaces for 400G application: an independent double 4-Lane mode client interfaces (for 400GbE application).


Absolute Maximum Ratings


Parameter

Min.

Max.

Units

Note

Storage Temperature

-40

85

C


Storage Humidity (Relative)

-

85

%

no- condensation

Case Temperature

-5

75

C


Operating Humidity (Relative)

-

85

%

no- condensation

Short term Operating Case Temperature


75

C


Power Supply Voltage

-0.3

3.63

V


RX Optical Maximum Input Power

-

10

dBm


Operating Conditions


Parameter

Min.

Max.

Units

Note

Operating Case Temperature

0

70

C


Operating Humidity (Relative)


85

%

no- condensation

Power Supply Operating Range

3.135

3.465

V


RX Optical Input Power

-

0

dBm


Power Supply Specifications


Parameter

Min.

Typ

Max.

Units

Note

3.3V DC Power Supply Voltage

3.135

3.3

3.465

V


3.3V DC Power Supply Current



7

A


Power Dissipation



18.5

W


Low Power Consumption



1.0

W


Module Inrush Current



100

mA/us


Turn-off Current

-100



mA/us


Power Supply Noise



25

mV



Low Speed Control and Sense Signals

Parameter

Symbol

Min

Max

Unit

Condition

SCL and SDA

VOL

0

0.4

V

IOL(max)=3 mA for fast mode, 20 mA for Fast-mode plus

SCL and SDA

VIL

-0.3

Vcc * 0.3

V


VIH

Vcc * 0.7

Vcc + 0.5

V


Capacitance for SCL and SDA I/O signal

Ci


14

pF


Total bus capacitive load for SCL and SDA

Cb


100

pF

For 300 kHz clock rate use 3.0k Ohms Pill-up resistor, max



200

pF

For 300 kHz clock rate use 3.0k Ohms Pill-up resistor, max

LPMode, ResetL, ModSelL and ePPS

VIL

-0.3

0.8

V


VIH

2

Vcc + 0.3

V


LPMode, ResetL and ModSelL

|Iin|


360

uA

0V<Vin<Vcc

ePPS

|Iin|


TBD

uA

0V<Vin<Vcc

IntL

VOL

0

0.4

V

IOL=2.0 mA

VOH

Vcc – 0.5

Vcc + 0.3

V

10k Ohms pull-up tp Host Vcc


ModPrsL

VOL

0

0.4

V

IOL=2.0 mA

VOH



V

ModPrsL can be implemented as a short-circuit to GND on the module


Transceiver Block Diagram


image


Optical Transmitter Specifications

Parameter

Min.

Typ.

Max.

Units

Note


Transmitter Frequency Range


191.3


193.7


196.1


THz

C band 75GHz ITU-T grid. Frequencyrange over which the specifications hold unless noted

otherwise

Laser Frequency Stability

-1.8


1.8

GHz

Frequency stability relative to ITU grid

Laser Frequency Accuracy

-1.8


1.8

GHz


Laser Frequency Fine TuningRange

-6.0


6.0

GHz


Fine Tuning Resolution


100


MHz


Channel Tuning Speed

-


60

S


Laser LineWidth



300

kHz


Transmitter Output PowerRange


-11.5


dBm


Transmitter Laser Disable Time



180

Ms



Output Power Stability


-0.5



0.5


dB

Difference over temperature, time,

wavelength and aging

Output Power Accuracy

-2


2

dB

Difference between the set value andactual value over aging

Transmitter Turn-up Time from Cold Start

-


100

S


Transmitter OSNR (Inband)

34


-

dB/0.1m m


Transmitter Back Reflectance

-


-24

dB


Transmitter Output Power withTX Disabled

-


-20

dBm


Transmitter Polarization Dependent Power


-



1.5


dB

Power deference between X and Ypolarization


Optical Receiver Specifications

Parameter

Min.

Typ.

Max.

Units

Note

Receiver Frequency Range

191.3

193.7

196.1

THz


Input Power Range

-12


0

dBm

Signal power of the channel at the OSNR Penalty < 0.5dB

OSNR Sensitivity



26

dB/0.1n m



Receiver Sensitivity


-20




dBm

Input power needed to achieve postFEC BER < 1E-15 when

OSNR Tolerance > 26dB/0.1nm

Los Assert

-20

-18

-16

dBm


Los Hysteresis

1.0


2.5

dB


CD Tolerance

2400



ps/nm

Tolerance to Chromatic Dispersion

DGD Tolerance

10



ps

Tolerance to PMD with < 0.5 dB penalty to OSNR sensitivity


Peak PDL Tolerance


3.5




dB

Tolerance to peak PDL with <

1.3 dBpenalty to OSNR sensitivity when change in SOP is < =1 rad/ms

Tolerance to Change in SOP

50


-

rad/ms



Input Power Transient Tolerance


-2



2


dB

Tolerance to change in input powerwith < 0.5 dB penalty to OSNR sensitivity

Input Power Reading Accuracy

-2


2

dB


Optical Return Loss

-20



dB

Optical reflectance at Rx connectorinput

Receiver Turn-up Time from Cold Start

-


100

s

From module reset, with valid opticalinput signal present


Electronical Characteristics for Transmitter

Parameter

Min.

Typ.

Max.

Units

Note

Signal Rate, each Lane


26.5625±100ppm


GBaud


Different Peak-Peak Input Voltage Tolerance



900

mVpp


Electronical Characteristics for Receiver

Parameter

Min.

Typ.

Max.

Units

Note

Signal Rate, each Lane


26.5625±100ppm


GBaud


Different Peak-Peak Input Voltage Tolerance


750

900

mVpp


Transition Time, 20% to 80%


9.5


ps



Pin Assignment and Description

The electrical pinout of the QSFP-DD module is shown in Figure 2 below.



image


image


Figure 2. MSA Compliant Connector


Pin Definition


Pin

Logic

Symbol

Description

Plug Sequence

1


GND

Ground

1B

2

CML-I

Tx2n

Transmitter Inverted Data Input

3B

3

CML-I

Tx2p

Transmitter Non-Inverted Data Input

3B

4


GND

Ground

1B

5

CML-I

Tx4n

Transmitter Inverted Data Input

3B

6

CML-I

Tx4p

Transmitter Non-Inverted Data Input

3B

7


GND

Ground

1B

8

LVTTL-I

ModSelL

Module Select

3B

9

LVTTL-I

ResetL

Module Reset

3B

10


VccRx

+3.3V Power Supply Receiver

2B


11

LVCMOS-

I/O


SCL


2-wire serial interface clock


3B


12

LVCMOS-

I/O


SDA


2-wire serial interface data


3B

13


GND

Ground

1B

14

CML-O

Rx3p

Receiver Non-Inverted Data Output

3B

15

CML-O

Rx3n

Receiver Inverted Data Output

3B

16

GND

Ground

1B


17

CML-O

Rx1p

Receiver Non-Inverted Data Output

3B

18

CML-O

Rx1n

Receiver Inverted Data Output

3B

19


GND

Ground

1B

20


GND

Ground

1B

21

CML-O

Rx2n

Receiver Inverted Data Output

3B

22

CML-O

Rx2p

Receiver Non-Inverted Data Output

3B

23


GND

Ground

1B

24

CML-O

Rx4n

Receiver Inverted Data Output

3B

25

CML-O

Rx4p

Receiver Non-Inverted Data Output

3B

26


GND

Ground

1B

27

LVTTL-O

ModPrsL

Module Present

3B

28

LVTTL-O

IntL

Interrupt

3B

29


VccTx

+3.3V Power supply transmitter

2B

30


Vcc1

+3.3V Power supply

2B


31


LVTTL-I


InitMode

Initialization mode; In legacy QSFP applications, the InitMode pad is called LPMODE


3B

32


GND

Ground

1B


33

CML-I

Tx3p

Transmitter Non-Inverted Data Input

3B

34

CML-I

Tx3n

Transmitter Inverted Data Input

3B

35


GND

Ground

1B

36

CML-I

Tx1p

Transmitter Non-Inverted Data Input

3B

37

CML-I

Tx1n

Transmitter Inverted Data Input

3B

38


GND

Ground

1B

39


GND

Ground

1A

40

CML-I

Tx6n

Transmitter Inverted Data Input

3A

41

CML-I

Tx6p

Transmitter Non-Inverted Data Input

3A

42


GND

Ground

1A

43

CML-I

Tx8n

Transmitter Inverted Data Input

3A

44

CML-I

Tx8p

Transmitter Non-Inverted Data Input

3A

45


GND

Ground

1A

46


Reserved

For future use

3A

47


VS1

Module Vendor Specific 1

3A

48


VccRx1

3.3V Power Supply

2A

49


VS2

Module Vendor Specific 2

3A

50


VS3

Module Vendor Specific 3

3A

51


GND

Ground

1A

52

CML-O

Rx7p

Receiver Non-Inverted Data Output

3A

53

CML-O

Rx7n

Receiver Inverted Data Output

3A

54


GND

Ground

1A

55

CML-O

Rx5p

Receiver Non-Inverted Data Output

3A

56

CML-O

Rx5n

Receiver Inverted Data Output

3A

57


GND

Ground

1A

58


GND

Ground

1A

59

CML-O

Rx6n

Receiver Inverted Data Output

3A

60

CML-O

Rx6p

Receiver Non-Inverted Data Output

3A

61


GND

Ground

1A

62

CML-O

Rx8n

Receiver Inverted Data Output

3A

63

CML-O

Rx8p

Receiver Non-Inverted Data Output

3A

64


GND

Ground

1A

65


NC

No Connect

3A

66


Reserved

For future use

3A

67


VccTx1

3.3V Power Supply

2A

68


Vcc2

3.3V Power Supply

2A

69


Reserved

For Future Use

3A

70


GND

Ground

1A


71

CML-I

Tx7p

Transmitter Non-Inverted Data Input

3A

72

CML-I

Tx7n

Transmitter Inverted Data Input

3A

73


GND

Ground

1A

74

CML-I

Tx5p

Transmitter Non-Inverted Data Input

3A

75

CML-I

Tx5n

Transmitter Inverted Data Input

3A

76


GND

Ground

1A


Digital Diagnostic Functions

The following digital diagnostic characteristics are defined over the normal operating conditions unless otherwise specified.


Parameter

Symbol

Min

Max

Units

Notes

Temperature monitor absolute error

DMI_Temp

-3

3

degC

Over operating temperature range

Supply voltage monitor absolute error

DMI _VCC

-0.1

0.1

V

Over full operating range

Channel RX power monitor absolute error

DMI_RX_Ch

-2

2

dB

1

Channel Bias current monitor

DMI_Ibias_Ch

- 10%

10%

mA


Channel TX power monitor absolute error

DMI_TX_Ch

-2

2

dB

1


Notes:

1. Due to measurement accuracy of different single mode fibers, there could be an additional +/-1 dB fluctuation, or a +/- 3 dB total accuracy.


Mechanical Dimensions


Diagram, engineering drawing Description automatically generated

ESD

This transceiver is specified as ESD threshold 1kV for high speed data pins and 2kV for all other electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22- A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.


Laser Safety

This is a Class 1 Laser Product according to EN 60825-1:2014. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007).

Caution: Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.


Licensing

The following U.S. patents are licensed by Finisar to FluxLight, Inc.:

U.S. Patent Nos: 7,184,668, 7,079,775, 6,957,021, 7,058,310, 6,952,531, 7,162,160, 7,050,720