Intel Compatible E25GSFP28LR Quick Spec:

Part Number: E25GSFP28LR

P2#y1

E25GSFP28LR-EXT E25GSFP28LR-IND


Form Factor: SFP28 TX Wavelength: 1310nm Reach: 10km

Cable Type: SMF Rate Category: 25G Interface Type: LR DDM: Yes

Connector Type: Dual-LC


Intel Compatible E25GSFP28LR Features


Intel Compatible E25GSFP28LR Applications


Product Description


The E25GSFP28LR is high performance, cost effective modules supporting data rate of 25Gbps.The transceiver is compliant with SFF-8431. It offers previously unavailable system cost, upgrade, and reliability benefits by virtue of being hot-pluggable.


Absolute Maximum Ratings

The operation in excess of any absolute maximum ratings might cause permanent damage to this module.


Parameter

Symbol

Min

Max

Unit

Notes

Storage Temperature

TS

-40

85

℃


Operating Case Temperature

TOP

0

70

℃


Power Supply Voltage

VCC

-0.5

3.6

V


Relative Humidity (non-condensation)

RH

5

95

%



Recommended Operating Conditions and Power Supply Requirements


Parameter

Symbol

Min

Typical

Max

Unit

Notes

Operating Case Temperature

TOP

0


70

℃


Power Supply Voltage

VCC

3.135

3.3

3.465

V


Power Consumption




1.5

W


Power Supply Current @ 3.3V

Icc



350

mA


Optical Characteristics - Transmitter

All parameters are specified under the recommended operating conditions unless otherwise specified..


Parameter

Symbol

Min

Typical

Max

Unit

Notes

Support data rate

-

-

-

28

Gb/s

-

Peak Wavelength

λp

1290

1310

1330

nm

4

Spectral Width (-20dB)



-

-

1

nm

-

Side Mode Suppression Ratio

SMSR

30



dB


Average Optical Output Power

Po

-8.4

-

3

dBm


Extinction Ratio

Er

3.5

-

-

dB


Transmitter and dispersion penalty

TDP



3

dB


Output Power with Transmitter Disabled


Poff




-30


dBm


Transmitter Enable Voltage

VEN

-0.3

-

0.8

V


Transmitter Disable Voltage

VD

2.0

-

Vcc+0.3

V


Differential Data Input Swing

VINpp

180

-

700

mV


Optical return loss tolerance




-12

dB


Output Eye Diagram

Compliant with IEEE 802.3

1

Receiver



Optical Characteristics - Receiver


Parameter

Symbol

Min

Typical

Max

Unit

Notes

Support data rate

-

-

-

28

Gb/s


Operate Wavelength

-

1260

-

1360

nm


Receiver sensitivity (BER of 1E-12) @25Gb/s

Sen

-

-

-10.4

dBm

2

Saturation(BER of 1E-12)

Psat

0.5

-

-

dBm

2

LOS Asserted

T_loss_ on

-30

-

-

dBm


LOS De-Asserted

T_loss_ off

-

-

-16

dBm


LOS Hysteresis

T_loss_ Hs

0.5

-

5.0

dB


Differential Data Output Swing

VOUTP P

450

-

1050

mV


LOS Low Voltage

VLout

-

-

0.4

V


LOS High Voltage

VHout

2.0

-

-

V


Notes:


  1. At least 1000 waveforms acquired, with minimum 5% margin against 802.3 mask

  2. Test at 25.78125Gb/s, PRBS 231-1, BER of 1E-12, NRZ and including back to back


Digital Diagnostic Functions

Digital diagnostics monitoring function is available on MindPhotonics product. A 2-wire serial interface provides user to contact with module. It is compliant to SFF-8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales stuff.


Parameter

Symbol

Min

Max

Unit

Notes

Temperature monitor absolute error

DMI_Temp

-3

+3

℃


Supply voltage monitor absolute error

DMI_VCC

-3%

+3%

V


TX power monitor absolute error

DMI_RX

-3

+3

dB


RX power monitor absolute error

DMI_RX

-3

+3

dB


Bias current monitor

DMI_Ibias

-10%

+10%

mA



Recommended Circuit


P394#y1


Mechanical Dimensions


P398#y1


Pin Assignment and Description


P407#y1

Pin Assignment

PIN #

Symbol

Description

Notes

1

VeeT

Transmitter Ground


2

TX Fault

Transmitter Fault Indication

Note 1


3


TX Disable


Transmitter Disable

Note 2, Module disables on high or open

4

SDA

2-wire Serial Interface Data Line(Same as MOD-DEF2 in INF-8074i)


5

SCL

2 Wire Serial Interface Data Line (Same as MOD-DEF1 as defined in the INF-8074i)



6


MOD-ABS

Module Absent,Connected to VeeT or VeeR in the module.


Note 3


7

RS0

SFP+ RX Rate Select, optional

Rate Select0, Not used.Note 9

8

LOS

Loss of Signal

Note 4

9

RS1

SFP+ TX Rate Select, optional

Rate Select 1, Not used.Note 9

10

VeeR

Receiver Ground

Note 5

11

VeeR

Receiver Ground

Note 5

12

RD-

Inv. Received Data Out

Note 6

13

RD+

Received Data Out

Note 6

14

VeeR

Receiver Ground

Note 5

15

VccR

Receiver Power

Note 7, 3.3V 5%

16

VccT

Transmitter Power

Note 7, 3.3V 5%

17

VeeT

Transmitter Ground

Note 5

18

TD+

Transmit Data In

Note 8

19

TD-

Inv. Transmit Data In

Note 8

20

VeeT

Transmitter Ground

Note 5

Notes:

Plug Seq.: Pin engagement sequence during hot plugging.

  1. TX Fault is an open collector/drain output, which should be pulled up with a 4.7K–10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT +0.3V. When high, output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.4V.

  2. TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7–10 KΩ resistor. Its states are:

    Low (-0.3–0.8V): Transmitter on (>0.8, < 2.0V): Undefined

    High (2.0–VccT+0.3V): Transmitter Disabled Open: Transmitter Disabled

  3. Mod-ABS shall be pulled up with a 4. 7K–10KΩ resistor on the host board. The pull -up voltage shall VccT or VccR.

  4. LOS (Loss of Signal) is an open collector/ drain output, which should be pulled up with a 4.7K–10KΩ resistor. Pull up voltage between 2.0V and VccR+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the

    standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.4V.

  5. VeeR and VeeT may be internally connected within the SFP module.

  6. RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

  7. VccR and VccT are the receiver and transmitter power supplies. They are de fined as 3.3V 5% at the SFP connector pin. Maximum supply current is 300mA. Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1Ω should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage.

    When the recommended supply filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30 m A greater than the steady state value. VccR and VccT may be internally connected within the SFP transceiver module.

  8. TD-/+: These are the differential transmitter inputs. They are AC -coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.

  9. Internally pulled down per SFF-8431 Rev 4.1.

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