Generic Compatible 25G LWDM O-Band 40km SFP28 Duplex LC SMF Optical Transceiver Module

SPECIFICATIONS
Product Model	SFP28-25-LWO-40-LCD	Manufacturer Brand	PHILISUN
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	9/125µm
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℃

PRODUCT PRESENTATION

The PHILISUN 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

PERFORMANCE PARAMETER

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.

Digital Diagnostic Monitoring Information
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	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.

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