Product Specification

25.78Gbps SFP+ 400m Transceiver

CLSFPP25GSR-400

Product Features

l  Supports 25GBASE-SR(25Gb/s);

l  Lane bit rate 25.78 Gb/s;

l  Maximum link length of 70m on OM3 MMF and 400m on OM4 MMF;

l  850nm VCSEL laser and PIN photo-detector;

l  High speed I/O electrical interface  (25GAUI);

l  I2C interface with integrated Digital Diagnostic monitoring;

l  SFP28 MSA package with duplex LC connector;

l  Maximum power consumption 1.0W

l  Single +3.3V power supply;               

l  Operating case temperature: Refer to Order info.   

l  Compliant to IEEE 802.3cc Draft3.0, SFF-8402 and SFF-8432;

l  Complies with EU Directive 2011/65/EU (RoHS 6/6);

    

Applications

√  25GBase-SR

√  CPRI      

1. Absolute Maximum Ratings

Parameter

Symbol

Min.

Typical

Max.

Storage Temperature

TS

-40

-

+85

Supply Voltage

VCC

-0.5

-

+4.0

Operating Relative Humidity

RH

-

-

+85

 

2. Recommended Operating Conditions

Parameter

Symbol

Min.

Typical

Max.

Unit

Operating  Case Temperature CLSFP25GSR

TC

-5

-

+70

°C

Operating  Case Temperature CLSFP25GSRI

TC

-40

-

+85

°C

Power Supply Voltage

VCC

3.13

3.3

3.47

V

Power Supply Current

ICC

-

-

0.28

A

Maximum Power Dissipation

PD

-

-

1.0

W

Lane Bit Rate

BRLANE

24.3

25.78

26.5

Gb/s

Transmission Distance(OM3)

TD

 

 

70

m

Transmission Distance(OM4)

TD

 

 

100

m

3. Optical Characteristics

Transmitter

Parameter

Symbol

Min.

Typical

Max.

Unit

Notes

Center Wavelength

λ0

840

850

860

nm

 

Average Launch Power

PTX_LANE

-8.4

-

2.4

dBm

1

Optical  Modulation  Amplitude

OMA

-6.4

-

3

dBm

 

Launch power in OMA minus TDP (min)

OMA_TDP

-7.3

-

-

dBm

 

Difference in launch power between lanes

PTX_DELTA_LANE

-

-

3.6

dB

 

Average Output Power (Laser Turn  off)

P0UT-OFF

-

-

-30

dBm

 

Extinction Ratio

ER

2

-

-

dB

 

Transmitter and dispersion penalty (TDP)

TDP

-

-

4.3

dB

 

Optical Return Loss Tolerance

ORLT

-

-

12

dB

 

Optical Eye Mask

Compliant with IEEE 802.3cc Draft  3.0

 

Receiver

Center Wavelength

λ0

840

850

860

nm

 

Average Rx Power per Lane, 100GE

PRX _LANE

-10.3

-

2.4

dBm

2

Receiver sensitivity (OMA)

POMA_LANE

-

-

-5.2

dBm

2

Receiver Overload

PIN-OL

3.4

-

-

dBm

 

Reflectance

Ref

-

-

-12

dB

 

LOS Assert per lane

LOSA

-18

-

-

dBm

 

LOS De-assert

LOSD

-

-

-14

dBm

 

LOS Hysteresis

LOSH

0.5

-

4

dB

 

Notes:

1. Class 1 Laser Safety limit per FDA/CDRH, and EN (IEC) 60825 laser safety standards.

2. Informative Only

4. Electrical Characteristics

Transmitter (Module Input)

Parameter

Symbol

Min.

Typical

Max.

Unit

Notes

Differential  Data  Input Amplitude

VIN,P-P

90

-

800

mVpp

 

Differential Termination Mismatch

 

-

-

5

%

 

 

Tx_Disable

Normal Operation

VIL

-0.3

-

0.8

V

 

Laser Disable

VIH

2.0

-

VCC+0.3

V

 

Receiver (Module Output)

Differential Data Output Amplitude

VOUT,P-P

185

-

425

mVpp

 

Differential Termination Mismatch（1MHZ）

 

-

-

5

%

 

Output Rise/Fall Time,  20%~80%

TR

12

-

-

ps

 

 

Rx_LOS

Normal Operation

VOL

-

-

0.2

V

 

Lose Signal

VOH

VCC-0.2

-

-

V

 

 

5. Pin Descriptions

 

Pin

Symbol

Description

Ref.

1

VEET

Transmitter Ground  (Common with Receiver Ground)

7.1

2

TFAULT

Transmitter Fault. Not supported.

 

3

TDIS

Transmitter Disable. Laser output disabled on high or open.

7.2

4

MOD_DEF(2)

Module Definition 2. Data line for Serial ID.

7.3

5

MOD_DEF(1)

Module Definition 1. Clock line for Serial ID.

7.3

6

MOD_DEF(0)

Module Definition 0. Grounded within the module.

7.3

7

RS0

Rate Select0, optionally controls SFP+ module receiver. When high input signaling rate>4.25 GBd and when low input signaling rate<4.25GBd

 

8

LOS

Loss of Signal indication.  Logic 0 indicates normal operation.

7.4

9

RS1

Rate Select1, optionally controls SFP+ module receiver. When high input signaling rate>4.25 GBd and when low input signaling rate<4.25GBd

 

10

VEER

Receiver Ground  (Common with Transmitter Ground)

7.1

11

VEER

Receiver Ground  (Common with Transmitter Ground)

7.1

12

RD-

Receiver Inverted DATA out.  AC Coupled.

 

13

RD+

Receiver Non-inverted DATA out.  AC Coupled.

 

14

VEER

Receiver Ground  (Common with Transmitter Ground)

7.1

15

VCCR

Receiver Power Supply

 

16

VCCT

Transmitter Power Supply

 

17

VEET

Transmitter Ground  (Common with Receiver Ground)

7.1

18

TD+

Transmitter Non-Inverted DATA in.  AC Coupled.

 

19

TD-

Transmitter Inverted DATA in.  AC Coupled.

 

20

VEET

Transmitter Ground  (Common with Receiver Ground)

7.1

 

 

Notes:

7.1 Circuit ground is internally isolated from chassis ground.

7.2 Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

7.3 Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line low to indicate module is plugged in.

7.4 LOS is open collector output.  Should be pulled up with 4.7k -10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

 

6. EEPROM & DDM THRESHOLD

6.1 EEPROM

2 wire address 1010000X (A0h)

 

0~95

Serial ID Defined by SFP MSA (96 bytes)

96~127

Vendor Speific (32 bytes)

128~255

Reserved (128 bytes)

 

6.2 DDM THRESHOLD

 

 

Low Alarm

Low Warn

High Warn

High Alarm

Temperature CLSFP25GSR

-10℃

-5℃

70℃

75℃

Voltage

3V

3.1V

3.5V

4V

Tx Bias

2mA

3mA

10mA

11mA

Tx Power

-9dBm

-6dBm

3dBm

3.5dBm

Rx Power

-13dBm

-10dBm

3dBm

3.5dBm

 

Ordering Information

 

Part No.

 

Data Rate

 

Laser

Fiber Type

 

Distance

Optical Interface

 

Temp

 

DDMI

CLSFPP25GSR-400

25.78Gbps

850nm

MMF

400m

LC

-5~70 °C

Y