SFP28 25G LR

 T&S TSSP-3125G-LR is a single-Channel, Pluggable, Fiber-Optical SFP28 for 25 Gigabit Ethernet Applications. It is a high-performance module for data communication and interconnect applications that operate at 25.78125 Gbps up to 10km. This module is designed to operate over single-mode fiber systems using a nominal wavelength of 1310nm. The electrical interface uses a 20 contact edge type connector. The optical interface uses duplex LC receptacle.

 

Features of 25G SFP28LR

Up to 25.78 Gb/s bi-directional data links

Hot-pluggable SFP+ footprint

Built-in digital diagnostic functions

1310nm DFB laser transmitter

Duplex LC connector

RoHS compliant

Up to 10 km on 9/125μm SMF

 Metal enclosure, for lower EMI

1.5W maximum power consumption with established link

Single 3.3V power supply

Operating case temperature

Commercial: 0°C to +70 °C

+3.3V single power supply RoHS compliant

 

Applications of SFP28 25G LR

25GE LR

eCPRI & CPRI

Specifications of SFP28 25G LR

Absolute Maximum Rating

 

These values represent the damage threshold of the module.  Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.

 

Parameters	Symbol	Min.	Max.	Unit
Power Supply Voltage	VCC	0	3.6	V
Storage Temperature	Tc	-40	85	°C
Operating Case Temperature	Tc	0	70	°C
Relative Humidity	RH	5	95	%
RX Input Average Power	Pmax	-	0	dBm

 

Pin Definition of SFP28 25G LR

Pin	Symbol	Name/Description
1	VEET [1]	Transmitter Ground
2	Tx_FAULT [2]	Transmitter Fault
3	Tx_DIS   [3]	Transmitter Disable. Laser output disabled on high or open
4	SDA [2]	2-wire Serial Interface Data Line
5	SCL [2]	2-wire Serial Interface Clock Line
6	MOD_ABS [4]	Module Absent. Grounded within the module
7	RS0 [5]	Rate Select 0
8	RX_LOS [2]	Loss of Signal indication. Logic 0 indicates normal operation
9	RS1 [5]	Rate Select 1
10	VEER [1]	Receiver Ground
11	VEER [1]	Receiver Ground
12	RD-	Receiver Inverted DATA out. AC Coupled
13	RD+	Receiver DATA out. AC Coupled
14	VEER [1]	Receiver Ground
15	VCCR	Receiver Power Supply
16	VCCT	Transmitter Power Supply
17	VEET [1]	Transmitter Ground
18	TD+	Transmitter DATA in. AC Coupled
19	TD-	Transmitter Inverted DATA in. AC Coupled
20	VEET [1]	Transmitter Ground

 

 

Notes:

Module circuit ground is isolated from module chassis ground within the module.

should be pulled up with 4.7k – 10k ohms on host board to a voltage between 3.15Vand 3.6V.

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

Mod_ABS is connected to VeeT or VeeR in the SFP+ module. The host may pull this contact up to Vcc_Host with a resistor in the range 4.7 kΩ to10 kΩ.Mod_ABS is asserted “High” when the SFP+ module is physically absent from a host slot.

RS0 and RS1 are module inputs and are pulled low to VeeT with > 30 kΩ resistors in the module.

Regulatory Compliance of SFP28 25G LR

T&S SFP+ transceiver is designed to be Class I Laser safety compliant and is certified per the following standards:

Feature	Agency	Standard	Certificate / Comments
Laser Safety	FDA	CDRH 21 CFR 1040 and Laser Notice No. 50	1120292-000
Product Safety	UL	UL and CUL EN60950-2:2007	E347511
Environmental protection	SGS	RoHS Directive 2002/95/EC	GZ1001008918/CHEM
EMC	WALTEK	EN 55022:2006+A1:2007	WT10093759-D-E-E
		EN 55024:1998+A1+A2:2003

 

Important Notice of SFP28 25G LR

Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by T&S before they become applicable to any particular order or contract. In accordance with the T&S policy of continuous improvement specifications may change without notice.

The publication of information in this data sheet does not imply freedom from patent or other protective rights of T&S or others. Further details are available from any T&S sales representative.

 

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