JFOPT SFP28 25G 1310nm 20km Optical Transceiver | Dual CDR Signal Enhancement | Class 1 Laser

Product model	JFTSM-SFP28-25-13-20(LR)-LCD	Manufacturer brand	JFOPT
Package type	SFP28	Optical connector	Duplex LC
Max data rate	25.78G	Channel data rate	10.31Gbps
Effective transmission distance	20km
Wavelength	1310nm	Operating voltage	3.3V
Fiber type	SMF	Core size	9/125
Transmitter type	DFB-LD	Receiver type	CDR
TX power	-7~2dbm	Receiver sensitivity	＜9.5dBm
Digital diagnostic monitoring(DDM)	YES	Receiver overload	2dBm
Power consumption	<1.2W	Protocols	SFF-8402
Operating temperature(Commercial)	0℃~+70℃	Storage temperature(Commercial)	-40℃~+85℃
Operating temperature(Industrial)	-40℃~+85℃	Storage temperature(Industrial)	-40℃~+85℃

PRODUCTION LINE INTRODUCTION

JFOPT continues to invest in optical transceiver production, covering a full range of optical transceiver such as 1*9, SFP, 10G, 25G, 100G, 200G, 400G, 800G GPON/EPON/XG/XGSPON OLT transceiver. At the same time, our company provides TOSA, ROSA, BOSA semi-finished device solutions for the downstream peer. JFOPT's production line has a daily production capacity of 10,000 optical transceivers and 20,000 optical devices. In addition, JFOPT's optical transceiver have industry-leading high temperature resistance and anti-interference capability, and are widely used in computing centers, operators, traffic security, power facilities and other industries.

PRODUCT PRESENTATION

The JFOPT SFP28 25G 1310nm 20km LR LC DX transceiver is a high-performance solution for duplex optical data communications, supporting data rates of 25.78Gbps. It features an SFP+ 20-pin connector for hot-pluggable capability and provides digital diagnostic monitoring through an I2C interface. The module includes built-in dual clock and data recovery (CDR) for enhanced signal integrity.Designed for single-mode fiber, this transceiver operates at a nominal wavelength of 1310nm. The transmitter section integrates a high-performance 1310nm DFB laser, compliant with Class 1 laser safety standards (IEC 60825). The receiver section is equipped with an InGaAs detector pre-amplifier (IDP) housed in an optical header, paired with a limiting post-amplifier IC for reliable and efficient performance.

TRANSCEIVER SERIES PRODUCTS

PRODUCTION & TESTING EQUIPMENT

FEATURES

Single +3.3V power supply					Hot-pluggable
Built-in dual CDR					Support 25.78 Gb/s data links
Up to 20km on 9/125um SMF					Operating case temperature:-40~+85
Very low EMI and excellent ESD protection					Power dissipation < 1.2W

APPLICATION

25GbE					CPRI
Other optical links

STANDARD COMPLIANCE

ABSOLUTE MAXIMUM RATINGS

Parameter	Symbol	Unit	Min.	Max.
Storage temperature range	Ts	°C	-45	85
Relative humidity	RH	%	0	95
Input voltage	Vcc	V	0	4

RECOMMENDED OPERATING CONDITIONS

Parameter	Symbol	Unit	Min.	Typ.	Max.
Operating case temperature range	Tc	℃	-45	-	85
Supply voltage	Vcc	V	3.135	3.3	3.465
Bit rate	BR	Gb/s	-	25.78125	-
Max supported link length	L	km	-	-	20

ELECTCTRICAL PORTS DEFINITION

Parameter	Symbol	Unit	Min.	Typ.	Max.	Note
Power dissipation	-	W	-	-	1.2	-
Transmitter
Input differential impedance	RIN	Ω	-	100	-	-
Single ended data input swing	VIN	mVp-p	90	-	450	-
Tx_disable input voltage – low	VIL	V	-0.3	-	0.8	-
Tx_disable input voltage – high	VIH	V	2.0	-	Vcc+0.3	-
Tx_fault output voltage – low	VOL	V	-0.3	-	0.8	-
Tx_fault output voltage – high	VOH	V	2.0	-	Vcc+0.3	-
Receiver
Output impedance (Differential)	Zout	V	-	100	-	-
Rx_LOS output voltage - low	VOL	V	-0.3	-	0.8	-
Rx_LOS output voltage- high	VOH	V	0.2	-	Vcc+0.3	-

OPTICAL TRANSMITTER/RECEIVER CHARACTERISTICS

Parameter	Symbol	Unit	Min.	Typ.	Max.	Note
Transmitter
Center wavelength	λ	nm	1295	1310	1325	-
Data rate	B	Gb/s	-	25.78	-	-
Output spectral width	λ(-20dB)	nm	-	-	1	-
Optical output power	Po	dBm	-7	-	2	-
Extinction ratio	ER	dB	3.5	-	-	-
Transmitterand dispersion penalty	TDP	dB	-	-	3.2	-
Receiver
Operating wavelength	λ	nm	1260	-	1355	-
Overload	-	dBm	2	-	-	-
Receiver sensitivity (OMA)	POMA	dBm	-	-	-11.3	-
Optical return loss	ORL	dB	-	-	-26	-
Signal detect threshold-de-assert	SD	dBm	-	-	-14	-
LOS hysteresis	-	dB	0.5	-	-	-

SFP28 TRANSCEIVER ELECTRICAL PAD LAYOUT

TRANSCEIVER PIN DESCRIPTIONS

Pin No.	Symbol	Logic	Description
1,20	VEET	-	Transmitter ground(common with receiver ground)
2	TX fault	LVTTL output	Transmitter fault. low normal operation, high fault indication
3	TX disable	LVTTL input	Transmitter disable. laser output disabled on high or open
4	SDA	LVTTL input/output	Module definition 2.data line for serial ID
5	SCL	LVTTL input/output	Module definition 1.clock line for serial ID
6	MOD-ABS	-	Module definition 0.grounded within the module
7	RS0	LVTTL input	Rate select 0, optionally controls SFP28 module receiver. LVTTL logic.
8	LOS	LVTTL output	Loss of signal indication. Logic 0 indicates normal operation.
9	RS1	LVTTL input	Rate select 1, optionally controls SFP28 module transmitter. LVTTL logic.
10,11,14	VEER	-	Receiver ground(common with transmitter ground)
12	RD-	CML output	Receiver inverted DATA out.AC coupled
13	RD+	CML output	Receiver non-inverted DATA out.AC coupled
15	VCCR	-	Receiver power supply
16	VCCT	-	Transmitter power supply
18	TD+	CML input	Transmitter non-inverted DATA in.AC coupled
19	TD-	CML input	Transmitter inverted DATA in.AC coupled

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