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Shenzhen MaoTeWang Electronic Technology Co., Ltd.

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EPON OLT PX20+_PX20++_PX20+++_8dBm_9dBm Transceiver

Single fiber bi-directional data links with 1.25Gbps TX and 1.25Gbps RX 1490nm continuous-mode transmitter with DFB LD 1310nm burst-mode receiver with APD-TIA 3.3V power supply 0 to 70°C operating case temperature SFP package with SC/UPC receptacle optical interface Support more than 15dB dynamic range Support 20km transmission distance with SMF Digital burst RSSI function to monitor the input optical

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OLT PON

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Product Details

Standard

IEEE 802.3ah 1000BASE-PX20+++

Class I laser safety standard IEC-60825 compliant

Compatible with SFF-8472

RoHS-6 compliance

Features

Single fiber bi-directional data links with 1.25Gbps TX and 1.25Gbps RX

1490nm continuous-mode transmitter with DFB LD

1310nm burst-mode receiver with APD-TIA

3.3V power supply

0 to 70°C operating case temperature

SFP package with SC/UPC receptacle optical interface

Support more than 15dB dynamic range

Support 20km transmission distance with SMF

Digital burst RSSI function to monitor the input optical

Ordering information

Part No.

Data Rate

Laser

Fiber
Type

Distance

Optical
Interface

Temp

SWFL1EP-SC

SWFL2EP-SC

SWFL3EP-SC

SWFL5EP-SC

SWFL6EP-SC

Tx: 1.25Gbps

Rx: 1.25Gbps

1490nm-DFB

SMF

20km

CT: 0~ +70℃;IT:-40~+85℃;ET: -20~+85℃

Absolute Maximum Ratings

Parameter	Symbol	Unit	Min	Typical	Max
Storage Ambient Temperature Range	Ts	℃	-40	-	85
Relative Humidity	RHs	%	5	-	95
Power Supply Voltage	Vcc	V	-0.5	-	3.6
Damage Threshold for Receiver	P_damage	dBm	-	-	0

Recommended Operating Conditions

Parameter	Symbol	Unit	Min	Typical	Max
Operating Case Temperature Range	T_C	℃	0	-	70
Power Consumption	P	W			1.5
Power Supply Voltage	V_cc3.3	V	3.135	3.3	3.465
Operating Relative Humidity	Rho	%	5		85

Optical Specification

1.25G TRANSMITTER OPTICAL SEPCIFICATION
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Center Wavelength Range	λ_c	1480	1490	1500	nm
Average Output Power （SWFL1EP-SC）	P_out	2	-	7	dBm	Note1
Average Output Power （SWFL2EP-SC）	P_out	5	-	8	dBm
Average Output Power （SWFL3EP-SC）	P_out	7	-	10	dBm
Average Output Power （SWFL5EP-SC）	P_out	8	-	-	dBm
Average Output Power （SWFL6EP-SC）	P_out	9	-	-	dBm	Note2
Optical Transmitter Power off	Poff	-	-	-39	dBm
Side Mode Suppression Ratio	SMSR	30	-	-	dB
Spectral Width (-20dB)	λ_-20	-	-	1	nm
Extinction Ratio	ER	9	-	-	dB
Transmitter Output Eye	Compliant With IEEE 802.3ah

1.244Gbps RECEVER OPTICAL SPECIFICATIONS
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Center Wavelength Range	λ_c	1290	1310	1330	nm
Overload （SWFL1EP-SC）	SAT	-6	-	-	dBm	Note2
Overload （SWFL2EP-SC）	SAT	-6	-	-	dBm
Overload （SWFL3EP-SC）	SAT	-6	-	-	dBm
Overload （SWFL4EP-SC）	SAT	-6	-	-	dBm
Overload （SWFL5EP-SC）	SAT	-6	-	-	dBm
Sensitivity （SWFL1EP-SC）	Sen		-	-31	dBm	Note2
Sensitivity （SWFL2EP-SC）	Sen			-32	dBm
Sensitivity （SWFL3EP-SC）	Sen			-33	dBm
Sensitivity （SWFL5EP-SC）	Sen			-33	dBm
Sensitivity （SWFL6EP-SC）	Sen			-33	dBm
LOSA Level	LOSA	-45	-	-	dBm
LOSD Level	LOSD			Sen-1	dBm

Electrical Characteristic

1.25Gbps TRANSMITTER ELECTRICAL CHARACTERISTICS
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Data Input Differential Swing		600		1600	mV	Note3
Input Differential Impedance		90	100	110	Ω
Tx_Dis Input Voltage- Low		0		0.8	V
Tx_Dis Input Voltage- High		2.0		Vcc	V
Tx_fault Output Voltage- Low		0		0.4	V
Tx_fault Output Voltage- High		2.4		Vcc	V

1.25Gbps RECEIVER ELECTRIAL CHARACTERISTICS
Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
Data Output Differential Swing		400		1600	mV	Note4
LOS Output Voltage- Low		0		0.4	V
LOS Output Voltage- High		2.4		Vcc	V
LOS Assert Time				500	ns
LOS De-assert Time				500	ns

Note1-EOL, Over Temperature;

Note2-Normal Temp AOP＞9dBm，Other Temp AOP＞8dBm;

Note3-Measured with a PRBS2^ 7 -1 @1.25Gbit/s BER<1E-12;

Note4-LVPECL input, AC coupled;

Note5- LVPECL output, DC coupled internally;

Timing Sequence for RSSI

Figure 1 Timing Sequence for RSSI

Parameter	Symbol	Min.	Typical	Max.	Unit	Notes
RSSI Burst Width	T_bw	400	-	Tont - Ttd	ns
Trigger Delay Time	T_td	0	-	3000	ns
Trigger Width	T_tw	-	500	-	ns
I2C Access Delay	T_a	500	-	-	us

Timing Sequence for Working Mode

Figure 2 Timing Sequence for Working Mode

Recommended Interface Circuit

Figure 3 Recommended Interface Circuit

PIN Definition

PIN	Name	Description	Notes
1	VeeT	Module Transmitter Ground
2	Tx_Fault	Module Transmitter Fault	LVTTL-O
3	Tx_DIS	Laser output is disabled when this pin is asserted high or left unconnected	LVTTL-I
4	SDA	No Function Definition	LVTTL-I
5	SCL	No Function Definition	LVTTL-I/O
6	MOD_ABS	Module Absent, connected to ground in the module
7	RSSI_TRIG	Receiver RSSI Trigger signal	LVTTL-I
8	LOS	Receiver Loss of Signal Indication	LVTTL, Low: signal detected; High: loss of signal
9	VeeR	Module Receiver Ground
10	VeeR	Module Receiver Ground
11	VeeR	Module Receiver Ground
12	RD-	Receiver Inverted Data Output	LVPECL-O, DC coupled
13	RD+	Receiver Non-Inverted Data Output	LVPECL-O, DC coupled
14	VeeR	Module Receiver Ground
15	VccR	Module Receiver 3.3V Supply
16	VccT	Module Transmitter 3.3V Supply
17	VeeT	Module Transmitter Ground
18	TD+	Transmitter Non-Inverted Data Input	LVPECL-I, AC coupled
19	TD-	Transmitter Inverted Data Input	LVPECL-I, AC coupled
20	VeeT	Module Transmitter Ground

Diagnostic

Parameter	Rang	Accuracy	Notes	Calibration
Case Temperature	0~70℃	±3	1LSB=1/256℃	Internal
Voltage	3.0~3.6V	±3%	1LSB=0.1mV	Internal
Ibias	0~100mA	±10%	1LSB=2uA	Internal
TX Power	0 to AOPdBm	±3	1LSB=0.1uW	Internal
RX Power	Sen~SATdBm	±3	1LSB=0.1uW	Internal

Package

Figure 4 Outline Package

EEPROM Definition

Figure 5 EEPROM field map

A0h
Address	Size(Byte)		Name of Field	Value(Hex)	Description
0	1		Identifier	03	SFP physical device
1	1		Ext.Identifier	04	Serial ID Module
2	1		Connector	01	SC
3~10	8		Transceiver	XX	XX
11	1		Encoding	03	NRZ
12	1		BR, Nominal	0C	1.25
13	1		Reserved	00
14	1		Length(9um)-km	14	20(km)
15	1		Length(9um)	C8	200(100m)
16	1		Length(50um)	00	Not Support MMF
17	1		Length(62.5um)	00	Not Support MMF
18	1		Length(Copper)	00	Not Support Copper
19	1		Length(OM3)	00	Not Support OM3
20~35	16		Vendor Name	53 41 4E 57 45 49 50 48 4F 54 4F 4E 49 43 53	SANWEIPHOTONICS
36	1		Transceiver	00	Unallocated
37~39	3		Vendor OUI	00 00 00
40~55	16		Vendor PN	53 57 46 4C 32 45 50 2D xx 43 20 20 20 20 20 20	SWFLxEP-SC
56~59	4		Vendor Rev	00 00 00 00	Revision of Part Number
60~61	2		Wavelength	05 D2	1490nm
62	1		Unallocated	00
63	1		CC_Base	xx	Checksum of Byte 0~62
64~65	2		Option Values	00 1A	LOS,TX_FAULT,TX_DISABLE
66	1		Signal Rate, max	00
67	1		Signal Rate, min	00
68~83	16		Vendor SN	xx	Vendor Serial Number
84~91	8		Date Code	xx	Date Code
92	1		Diagnostic Monitoring Type	68	Digital Diagnostic Monitoring Implemented, Internally Calibrated, Average Power
93	1		Enhanced Options	E0	Optional enhanced features are implemented
94	1		SFF-8472 Compliance	08	Revision of SFF-8472 the transceiver complies with
95	1		CC_EXT	xx	Checksum of Byte 64~94
96~127	64		Vendor Specific	xx	Reserved
A2h
Address	Size(Byte)	Bits	Name of Field	Description
0~1	2	ALL	Temp High Alarm	MSB at Low Address, Setting Value: 85℃
2~3	2	ALL	Temp Low Alarm	MSB at Low Address, Setting Value: -15℃
4~5	2	ALL	Temp High Warning	MSB at Low Address, Setting Value: 80℃
6~7	2	ALL	Temp Low Warning	MSB at Low Address, Setting Value: -10℃
8~9	2	ALL	Voltage High Alarm	MSB at Low Address, Setting Value: 3.6V
10~11	2	ALL	Voltage Low Alarm	MSB at Low Address, Setting Value: 3V
12~13	2	ALL	Voltage High Warning	MSB at Low Address, Setting Value: 3.5V
14~15	2	ALL	Voltage Low Warning	MSB at Low Address, Setting Value: 3.1V
16~17	2	ALL	Bias High Alarm	MSB at Low Address, Setting Value: 100mA
18~19	2	ALL	Bias Low Alarm	MSB at Low Address, Setting Value: 2mA
20~21	2	ALL	Bias High Warning	MSB at Low Address, Setting Value: 90mA
22~23	2	ALL	Bias Low Warning	MSB at Low Address, Setting Value: 3mA
24~25	2	ALL	TX Power High Alarm	MSB at Low Address, Setting Value: xxdBm
26~27	2	ALL	TX Power Low Alarm	MSB at Low Address, Setting Value: xxdBm
28~29	2	ALL	TX Power High Warning	MSB at Low Address, Setting Value: xxdBm
30~31	2	ALL	TX Power Low Warning	MSB at Low Address, Setting Value: xxdBm
32~33	2	ALL	RX Power High Alarm	MSB at Low Address, Setting Value: -6dBm
34~35	2	ALL	RX Power Low Alarm	MSB at Low Address, Setting Value: -33dBm
36~37	2	ALL	RX Power High Warning	MSB at Low Address, Setting Value: -7dBm
38~39	2	ALL	RX Power Low Warning	MSB at Low Address, Setting Value: -32dBm
40~41	2	ALL	Tx Power Max High Alarm	Reserved
42~47	6	ALL	Optional Laser Temp Alarm/Warning	Reserved
48~49	2	ALL	Tx Power Min High Alarm	Reserved
50~55	6	ALL	Optional TEC Current Alarm/Warning	Reserved
56~59	4	ALL	Rx_PWR(4)	00 00 00 00
60~63	4	ALL	Rx_PWR(3)	00 00 00 00
64~67	4	ALL	Rx_PWR(2)	00 00 00 00
68~71	4	ALL	Rx_PWR(1)	3F 80 00 00
72~75	4	ALL	Rx_PWR(0)	00 00 00 00
76~77	2	ALL	Tx_I(Slope)	01 00
78~79	2	ALL	Tx_I(Offset)	00 00
80~81	2	ALL	Tx_PWR(Slope)	01 00
82~83	2	ALL	Tx_PWR(Offset)	00 00
84~85	2	ALL	T(Slope)	01 00
86~87	2	ALL	T(Offset)	00 00
88~89	2	ALL	V(Slope)	01 00
90~91	2	ALL	V(Offset)	00 00
92~94	3	ALL	Reserved	Reserved
95	1	ALL	Checksum	Checksum of Bytes 0~94
96	1	ALL	Temperature MSB	Internally Measured Module Temperature
97	1	ALL	Temperature LSB	Internally Measured Module Temperature
98	1	ALL	Vcc MSB	Internally Measured Module Supply Voltage
99	1	ALL	Vcc LSB	Internally Measured Module Supply Voltage
100	1	ALL	TX Bias MSB	Internally Measured Module TX Bias Current
101	1	ALL	TX Bias LSB	Internally Measured Module TX Bias Current
102	1	ALL	TX Power MSB	Internally Measured Module TX Output Power
103	1	ALL	TX Power LSB	Internally Measured Module TX Output Power
104	1	ALL	RX Power MSB	Internally Measured Module RX Input Power
105	1	ALL	RX Power LSB	Internally Measured Module RX Input Power
106~107	1	ALL	Optional Laser Temp/WL MSB/LSB	Reserved
108~109	1	ALL	Optional TEC Current MSB/LSB	Reserved
110	1	7	TX Disable State	Digital state of the TX Disable Input Pin. Updated within 100ms of change on pin.
		6	Soft TX_Disable	Writing “1” to disable 1490nm optic output power, default value is “0”.
		5~3	Reserved
		2	TX Fault State	Digital state of TX Fault Signal
		1	RX LOS	Digital state of LOS output pin. 0= signal detected,1=LOS
		0	Reserved
111	1	ALL	Reserved
112	1	7	Temp High Alarm	Set when internal temperature exceeds high alarm level
		6	Temp Low Alarm	Set when internal temperature exceeds low alarm level
		5	Vcc High Alarm	Set when internal supply voltage exceeds high alarm level
		4	Vcc Low Alarm	Set when internal supply voltage exceeds low alarm level
		3	TX Bias High Alarm	Set when internal TX Bias exceeds high alarm level
		2	TX Bias Low Alarm	Set when internal TX Bias exceeds low alarm level
		1	TX Power High Alarm	Set when internal TX Power exceeds high alarm level
		0	TX Power Low Alarm	Set when internal TX Power exceeds Low alarm level
113	1	7	RX Power High Alarm	Set when Received Power exceeds high alarm
		6	RX Power Low Alarm	Set when Received Power exceeds low alarm
		5	TX MAX High Alarm	Set when TX MAX power exceeds high alarm level
		4	Reserved Alarm	Reserved
		3	TX MAX Low Alarm	Set when TX MIN power exceeds low alarm level
		2	Optional TEC Current Low Alarm	Reserved
		1	Reserved Alarm
		0	Reserved Alarm
114~115	2	ALL	Reserved	Reserved
116	1	7	Temp High Warning	Set when internal temperature exceeds high warning level
		6	Temp Low Warning	Set when internal temperature exceeds low warning level
		5	Vcc High Warning	Set when supply voltage exceeds high warning level
		4	Vcc Low Warning	Set when supply voltage exceeds low warning level
		3	TX Bias High Warning	Set when TX Bias current exceeds high warning level
		2	TX Bias Low Warning	Set when TX Bias current exceeds low warning level
		1	TX Power High Warning	Set when TX Power TX output power exceeds high warning level
		0	TX Power Low Warning	Set when TX Power TX output power exceeds low warning level
117	1	7	RX Power High Warning	Set when received power exceeds high warning level
		6	RX Power Low Warning	Set when received power exceeds low warning level
		5~0	Reserved
118~119	2	ALL	Reserved	Reserved
120~127	8	ALL	Vendor Specific	Vendor Specific
128~247	120	ALL	User EEPROM	User writable EEPROM
248-255	8	ALL	Vendor Specific	Vendor Specific

Version Information

Version No.	Author	Notes	Time
1.0	Qiu	New Release	2024-05-18

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FAQ

Listed below are answers to our most commonly asked questions. Don't see your question?Contact our customer service team. We would be glad to assist you.

What is an optical network terminal (ONT)? How does it differ from a regular modem?

An optical network unit (ONU) is an end device in a fiber optic network that converts optical signals transmitted via fiber optics into electrical signals (for use by routers, computers, and other devices), and vice versa.

What is the architecture of a fiber optic network (PON)?

Fiber optic networks typically use a passive optical network (PON) architecture, which is divided into three layers

What are the functions of the PON port and LAN port on an optical network terminal (ONT)?

PON port (fiber optic interface): Connects to the fiber optic cable entering the home and receives optical signals (usually SC/APC interface, blue square head).

Why does the optical network terminal need to register LOID/SN?

LOID (Logical Identifier) or SN (Serial Number) is the credential used by operators to bind user identities, and is used for OLT authentication of optical modems.

Optical modem dialing vs. router dialing: which is better?

Ordinary users: Optical modem dialing. Game/NAS users: Switch to bridge mode and dial up using a high-performance router.

How to determine whether the fiber optic signal is normal?

Check the optical modem indicator lights Log in to the optical modem management interface: Check the optical power (unit: dBm)

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