Cisco Compatible SFP-50G-LR-S-FL Quick Spec:

Part Number: SFP-50G-LR-S-FL

SFP-50G-LR-S-EXT-FL SFP-50G-LR-S-IND-FL SFP-50G-LR-S-FLT

SFP-50G-LR-S-EXT-FLT SFP-50G-LR-S-IND-FLT

Form Factor: SFP56

TX Wavelength: 1310nm

Reach: 10km

Cable Type: SMF

Rate Category: 10G/25/50GBase

Interface Type: LR

DDM: Yes

Connector Type: Dual-LC

Cisco Compatible SFP-50G-LR-S-FL Features

• Support eCPRI wireless and 50GBASE-LR application

• Comply with IEEE 802.3cd 50GBASE-LR

• Comply with IEEE 802.3 50GAUI- 1 C2M electrical interface.

• Management Interface comply with SFF-8472

• Comply with SFF-8432 with duplex LC connector

• Up to 10km transmission on SMF

• 2-wire interface with integrated Digital Diagnostic monitoring

• DFB laser and PIN receiver

• Support 10Gbps/25Gbps/26.5625GBd rate selection

• Single +3.3V power supply

• Power consumption lower than 2W

• Operating temperature range:

  • Standard: 0°C to +70 °C

  • Extended -5°C to +85 °C

  • Industrial -40°C to +85 °C

    
    

    Cisco Compatible SFP-50G-LR-S-FL Applications

• 25GBASE-LR

Product Description

The Cisco Compatible SFP-50G-LR-S-FL optical transceiver supports high-speed serial links over single- mode optical fiber at signaling rates up to 57.8 Gb/s PAM4 (the serial line rate of 64GFC). The product is compliant with Small Form Pluggable SFP+ industry agreements for mechanical and low-speed electrical specifications. High-speed electrical and optical specifications are compliant with ANSI Fibre Channel FC-PI-7.

The SFP-50G-LR-S-FL is a multirate 1310-nm transceiver that ensures compliance with FC-PI-7 64GFC, 32GFC, and 16GFC specifications. Per the requirements of 64GFC, internal clock and data recovery circuits (CDRs) are present on both electrical input and electrical output of this transceiver. These CDRs lock at 57.8-Gb/s PAM4, 28.05-Gb/s NRZ, and 14.025-Gb/s NRZ (64GFC, 32GFC, and 16GFC) accomplished by using two Rate Select inputs and I2C to configure

transmit and receive sides.

Digital diagnostic monitoring information (DMI) is present in the SFP56-10/25/50GBase-LR per the requirements of SFF- 8472, providing real-time monitoring information of transceiver laser, receiver, and environment conditions over an SFF- 8431 I2C interface.

Regulatory Compliance

Cisco Compatible SFP-50G-LR-S-FL Absolute Maximum Ratings

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

Cisco Compatible SFP-50G-LR-S-FL Recommended Operating Conditions

Note:

1. Measured with SMF.

   
   

   Cisco Compatible SFP-50G-LR-S-FL Optical Characteristics

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

   
   

   Parameter	Symbol	Min	Typical	Max	Unit	Notes
   Transmitter
   Center Wavelength	λC	1304.5		1317.5	nm	1
   		1300		1320		2
   Modulation Format		PAM4
   Average Output Power	P0UT	-4.5	-	4.2	dBm
   Outer Optical Modulation Amplitude	OMA	- 1.5	-	4	dBm
   TDECQ	TDECQ			3.2	dB
   Average Output Power ( Laser Off)	P0UT- OFF	-	-	-30	dBm
   Extinction Ratio	ER	3.5	-	-	dB
   RIN15.6OMA	-	-	-	- 132	dB/Hz
   Optical return loss tolerance	-	-	-	15.6	dB
   Transmitter reflectance	-	-	-	-26	dB
   Receiver
   Center Wavelength Range	λC	1295	1311	1325	nm
   Damage threshold	-	-	-	5.2	dBm	3
   Average receive power		- 10.8		4.2	dBm
   Receiver Power ( OMAouter)	-	-	-	4	dBm	4
   Receiver sensitivity ( OMAouter)		Max(–8.4, SECQ – 9.8)			dBm
   LOS Assert	LOSA	-30	-		dBm
   LOS De- assert	LOSD	-	-	- 11	dBm
   LOS Hysteresis	LOSH	0.5	-	-	dB

   Notes:

   1. For C temp 0~70°C

   2. For I temp -40~85°C

   3. The receiver shall be able to tolerate, without damage, continuous exposure to an optical signal having this average power level. The receiver does not have to operate correctly at this input power

   4. Measured with a PRBS31Q test pattern @26.5625 GBd, BER≤2.4X10^-4.

Cisco Compatible SFP-50G-LR-S-FL Electrical Specifications

Cisco Compatible SFP-50G-LR-S-FL Digital Diagnostic Functions

Digital diagnostics monitoring function is available on FluxLight 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.

Mechanical Dimensions

Cisco Compatible SFP-50G-LR-S-FL Pin Assignment and Description

Pin Definitions

10

VEE R

Module Receiver Ground

3

Notes:

1. Labeling as inputs (I) and outputs (O) are from the perspective of the module .

2. The case makes electrical contact to the cage before any of the board edge contacts are made.

3. The module signal ground contacts, VeeR and VeeT, should be isolated from the module case.

4. This contact is an open collector/ drain output contact and shall be pulled up on the host. Pull ups can be connected to one of several power supplies, however the host board design shall ensure that no module contact has voltage exceeding module VccT/ R + 0 . 5 V.

5. Tx_Disable is an input contact with a 4.7 kOhms to 10 kOhms pullup to VccT inside the module.

6. 2-wire interface.

7. The pins shall be pulled up with 4.7K- 10Kohms to a voltage between 3. 14V and 3.46V on host board

Cisco Compatible SFP-50G-LR-S-FL Rate Selection

Notes:

A2.73.bit 4 is default to 1b, RS0 and RS1 hardware pins state are ignored, module allows RS0(1) bits for 10G/25G rate selection

Pin Assignment

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