JFOPT SFP28 25G LWDM Optical Transceiver - 40km LC Duplex EML/APD

Product model	JFTSM-SFP28-25-LWD-40-LCD	Manufacturer brand	JFOPT
Package type	SFP28	Optical connector	Duplex LC
Max data rate	25.78G	Channel data rate	-
Effective transmission distance	40km
Wavelength	1286.66nm 1291.10nm 1295.56nm 1300.05nm 1304.58nm 1309.14nm	Operating voltage	3.3V
Fiber type	SMF	Core size	9/125
Transmitter type	EML LWDM	Receiver type	APD
TX power	-2~6dBm	Receiver sensitivity	<-19dBm
Digital optical monitoring(DOM)	YES	Receiver overload	-
Power consumption	1.5W	Protocols	SFF-8431, SFF-8472, IEEE 802.3CC
Operating temperature(Commercial)	0℃~+70℃	Storage temperature(Commercial)	-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 LWDM 40km LC DX transceiver is a compact and high-performance optical module designed for 25GBASE-ER Ethernet applications. It converts 25Gbps serial CML electrical signals into serial optical data and ensures compliance with the 25GBASE-ER standard.Equipped with an EML transmitter and an APD receiver, this transceiver delivers exceptional performance for single-mode fiber (SMF) links up to 40km. It adheres to SFF-8431, SFF-8432, and IEEE 802.3CC standards, offering reliable and consistent functionality.Digital diagnostic monitoring is accessible via a 2-wire serial interface, as defined by the SFF-8472 specification. The fully compliant SFP28 form factor supports hot pluggability, simplifies optical port upgrades, and minimizes EMI emissions, making it an ideal solution for high-speed network environments.

TRANSCEIVER SERIES PRODUCTS

PRODUCTION & TESTING EQUIPMENT

FEATURES

25.78Gb/s bit rates					Hot-pluggable
EML transmitter, APD photo-detector					Up to 40km on SMF
Operating case temperature range: 0~ 70°C					2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface for optical transceivers
Duplex LC connector					Power supply :+3.3V
Cost effective SFP28 solution, enables higher port densities and greater bandwidth					Low power consumption<1.5W

APPLICATION

High-speed storage area networks				Computer cluster cross-connect
Custom high-speed data pipes				Inter rack connection
WDM system

STANDARD COMPLIANCE

ABSOLUTE MAXIMUM RATINGS

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Storage temperature	TS	-40	-	+85	℃	-
Case operating temperature	TA	0	-	70	℃	-
Maximum supply voltage	VCC	0	-	3.6	V	-
Relative humidity	RH	5	-	95	%	-

ELECTRICAL CHARACTERISTICS

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Supply voltage	VCC	3.135	-	3.465	V	-
Supply current	ICC	-	-	606	mA	-
Power consumption	P	-	-	2	W	-
Data rate	R	-	25.78	-	Gb/s	-
Transmitter section:
Input differential impedance	Rin	-	100	-	Ω	1
Tx input single ended DC voltage tolerance (ref VeeT)	V	-0.3	-	4	V	-
Differential input voltage swing	Vin,pp	180	-	700	mV	2
Transmit disable voltage	VD	2	-	VCC	V	-
Transmit enable voltage	VEN	Vee	-	Vee+0.8	V	-
Receiver section:
Single ended output voltage tolerance	V	-0.3	-	4	V	-
Rx output diff voltage	VO	150	-	900	mV	-
Rx output rise and fall time	Tr/Tf	9.5	-	-	ps	3
LOS fault	VLOS fault	2	-	VCCHOST	V	4
LOS normal	VLOS norm	Vee	-	Vee+0.8	V	4
Notes: 1.Connected directly to TX data input pins. AC coupling from pins into laser driver IC. 2.Per SFF-8431 Rev 3.0 3.20%～80% 4.LOS is an open collector output. Should be pulled up with 4.7k – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.

OPTICAL CHARACTERISTICS

Parameter	Symbol	Min.	Typ.	Max.	Unit	Ref.
Transmitter section:
Center Wavelength	λt	1285.51	1286.66	1287.81	nm	-
		1289.95	1291.1	1292.25
		1294.41	1295.56	1296.71
		1298.9	1300.05	1301.2
		1303.43	1304.58	1305.73
		1307.99	1309.14	1310.29
spectral width	△λ	-	-	1	nm	-
Average optical power	Pavg	-2.0	-	+6	dBm	1
Laser off power	Poff	-	-	-30	dBm	-
Extinction ratio	ER	4	-	-	dB	-
Receiver section:	-	-	-	-	-	-
Center wavelength	λr	1295	-	1325	nm	-
Receiver sensitivity(OMA)	Sen	-	-	-19	dBm	2
Stressed sensitivity(OMA)	Sen2	-	-	-16.5	dBm	2
Los sssert	LOSA	-30	-	-	dBm	-
Los dessert	LOSD	-	-	-20	dBm	-
Los hysteresis	LOSH	0.5	-	5	dB	-
Overload	Sat	-6	-	-	dBm	3
Receiver reflectance	Rrx	-	-	-12	dB	-
Notes: 1.Average power figures are informative only, per IEEE802.3CC. 2.Conditions of stressed receiver tests per IEEE802.3CC. At 5E-5 BER. 3.Receiver overload specified in OMA and under the worst comprehensive stressed condition.

TIMING CHARACTERISTICS

Parameter	Symbol	Min.	Typ.	Max.	Unit
TX_disable assert time	t_off	-	-	100	us
TX_disable negate time	t_on	-	-	2	ms
Time to initialize include reset of TX_FAULT	t_int	-	-	300	ms
TX_FAULT from fault to assertion	t_fault	-	-	1	ms
TX_disable time to start reset	t_reset	10	-	-	us
Receiver loss of signal assert time	TA,RX_LOS	-	-	100	us
Receiver loss of signal de assert time	Td,RX_LOS	-	-	100	us
Rate-select chage time	t_ratesel	-	-	10	us
Serial ID clock time	t_serial-clock	-	-	100	kHz

DIGITAL DIAGNOSTIC MONITORING SPECIFICATIONS

Data Address	Parameter	Accuracy	Unit
96-97	Transceiver internal temperature	±3.0	℃
98-99	VCC3 internal supply voltage	±3.0	%
100-101	Laser bias current	±10	%
102-103	Tx output power	±2.0	dBm
104-105	Rx input power	±2.0	dBm

PIN ASSIGNMENT

Pin	Name	Function	Notes
1	VeeT	Module transmitter ground	1
2	TX fault	Module transmitter fault	2
3	TX disable	Transmitter disable; Turns off transmitter laser output	3
4	SDL	2 wire serial interface data input/output (SDA)	4
5	SCL	2 wire serial interface clock input (SCL)	4
6	MOD_ABS	Module absent, connect to VeeR or VeeT in the module	2
7	RS0	Rate select0, optionally control SFP+ receiver. When high, input data rate >4.5Gb/ s; when low, input data rate <=4.5Gb/s	-
8	LOS	Receiver Loss of signal indication	-
9	RS1	Rate select0, optionally control SFP+ transmitter. When high, input data rate >4.5Gb/s; when low, input data rate <=4.5Gb/s	-
10	VeeR	Module receiver ground	1
11	VeeR	Module receiver ground	1
12	RD-	Receiver inverted data out put	-
13	RD+	Receiver non-inverted data out put	-
14	VeeR	Module receiver ground	1
15	VccR	Module receiver 3.3V supply	-
16	VccT	Module transmitter 3.3V supply	-
17	VeeT	Module transmitter ground	1
18	TD+	Transmitter non-inverted data out put	-
19	TD-	Transmitter inverted data out put	-
20	VeeT	Module transmitter ground	1
Notes: 1.The module ground pins shall be isolated from the module case. 2.This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board. 3.This pin shall be pulled up with 4.7K-10Kohms to VccT in the module. 4.This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.

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