Comelink SFP-Ge-B20 1.25GB/S Bidi SFP Transceiver

Product Description

Products Description

COME-SFP-GE-LX-B20 high performance, cost-effective 1.25G BiDi SFP transceiver complies with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). It provides Digital diagnostics functions via a 2-wire serial interface as specified in SFF-8472. It adopts high-performance FP/DFB transmitter and high-sensitivity PIN receiver, provides up to 14dB link budge for Gigabit Ethernet applications up to 20km on a single core single mode fiber.
 

Features

1.  Up to 1.25Gb/s Data Links 

2. Hot-Pluggable
3.  Simplex LC connector; SC optional
4. 1310nm FP or 1490/1550nm DFB transmitter, PIN photo-detector
5.  20km on a single core SMF
6. 2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface
7. Power Supply :+3.3V
8. Power consumption<1W
9.  Temperature Range: 0~ 70°C, -40°C to 85°C/-5°C to 85°C available
10. RoHS compliant

Application

  1.  1000Base-LX Ethernet
  2.   Metro/Access Networks
  3.  1G Fibre Channel
  4.   Other Optical Links

Ordering Information

Part Number	Data Rate	Distance	Wavelength	Laser	Fiber	DDM	Connector
COME-SFP-GE-B20-35	1.25Gb/s	20km	TX1310nm/RX1550nm	FP/PIN	SM	Yes	Simplex LC
COME-SFP-GE-B20-53	1.25Gb/s	20km	TX1550nm/RX1310nm	DFB/PIN	SM	Yes	Simplex LC
COME-SFP-GE-B20-35-SC	1.25Gb/s	20km	TX1310nm/RX1550nm	FP/PIN	SM	Yes	Simplex SC
COME-SFP-GE-B20-53-SC	1.25Gb/s	20km	TX1550nm/RX1310nm	DFB/PIN	SM	Yes	Simplex SC
COME-SFP-GE-B20-34	1.25Gb/s	20km	TX1310nm/RX1490nm	FP/PIN	SM	Yes	Simplex LC
COME-SFP-GE-B20-43	1.25Gb/s	20km	TX1490nm/RX1310nm	DFB/PIN	SM	Yes	Simplex LC
COME-SFP-GE-B20-34-SC	1.25Gb/s	20km	TX1310nm/RX1490nm	FP/PIN	SM	Yes	Simplex SC
COME-SFP-GE-B20-43-SC	1.25Gb/s	20km	TX1490nm/RX1310nm	DFB/PIN	SM	Yes	Simplex SC

 
"-E" for extended temperature-5°Cto 85°C;
"-I" for extended temperature -40°C to 85°C.

Absolute Maximum Ratings

Parameter	Symbol	Min.	Typical	Max.	Unit
StorageTemperature	TS	-40		+85	°C
SupplyVoltage	VCCT, R	-0.5		4	V
RelativeHumidity	RH	0		85	%

 Recommended Operating Environment:

Parameter		Symbol	Min.	Typical	Max.	Unit
CaseoperatingTemperature	Industrial	TC	-40		85	°C
	Extended		-5		85	°C
	Commercial		0		+70	°C
SupplyVoltage		VCC	3.135		3.465	V
Supply Current		Icc			300	mA
Inrush Current		Isurge			Icc+30	mA
Maximum Power		Pmax			1	W

 Electrical Characteristics (TOP = 0 to70 °C, VCC = 3.135 to 3.465 Volts)

Parameter	Symbol	Min.	Typical	Max.	Unit	Note
Transmitter Section:
Input differential impedance	Rin	90	100	110
Single ended data input swing	Vin PP	250		1200	mVp-p
Transmit Disable Voltage	VD	Vcc - 1.3		Vcc	V	2
Transmit Enable Voltage	VEN	Vee		Vee+ 0.8	V
Transmit Disable Assert Time	Tdessert			10	us
Receiver Section:
Single ended data output swing	Vout,pp	300		800	mv	3
LOS Fault	Vlosfault	Vcc - 0.5		VCC_host	V	5
LOS Normal	Vlos norm	Vee		Vee+0.5	V	5
Power Supply Rejection	PSR	100			mVpp	6

  Pin Function Definitions

Pin No	Name	Function	Plug Seq	Notes
1	VeeT	Transmitter Ground	1	1
2	TX Fault	Transmitter Fault Indication	3
3	TX Disable	Transmitter Disable	3	2
4	MOD-DEF2	Module Definition	2	3
5	MOD-DEF1	Module Definition 1	3	3
6	MOD-DEF0	Module Definition 0	3	3
7	Rate Select	Not Connected	3	4
8	LOS	Loss of Signal	3	5
9	VeeR	Receiver Ground	1	1
10	VeeR	Receiver Ground	1	1
11	VeeR	Receiver Ground		1
12	RD-	Inv. Received Data Out	3	6
13	RD+	Received Data Out	3	6
14	VeeR	Receiver Ground	3	1
15	VccR	Receiver Power	2	1
16	VccT	Transmitter Power	2
17	VeeT	Transmitter Ground	1
18	TD+	Transmit Data In	3	6
19	TD-	Inv. Transmit In	3	6
20	VeeT	Transmitter Ground	1

Notes: 1. Circuit ground is internally isolated from chassis ground.
2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
3. Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line low to indicate module is plugged in.
4. Rate select is not used
5. LOS is open collector output. Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
6. AC Coupled
 

   SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I²Cinterface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte definitions, please refer to the SFF-8472, "Digital Diagnostic Monitoring Interface for Optical Transceivers". The DDM parameters have been internally calibrated.

Data Address	Length (Byte)	Name of Length	Description and Contents
Base ID Fields
0	1	Identifier	Type of Serial transceiver (03h=SFP)
1	1	Reserved	Extended identifier of type serial transceiver (04h)
2	1	Connector	Code of optical connector type (07=LC)
3-10	8	Transceiver
11	1	Encoding	NRZ(03h)
12	1	BR, Nominal	Nominal baud rate, unit of 100Mbps
13-14	2	Reserved	(0000h)
15	1	Length(9um)	Link length supported for 9/125um fiber, units of100m
16	1	Length(50um)	Link length supported for 50/125um fiber, units of10m
17	1	Length(62.5um)	Link length supported for 62.5/125um fiber, units of10m
18	1	Length(Copper)	Link length supported for copper, units of meters
19	1	Reserved
20-35	16	Vendor Name	SFP vendor name: COMELINK
36	1	Reserved
37-39	3	Vendor OUI	SFP transceiver vendor OUI ID
40-55	16	Vendor PN	Part Number: "COME-SFP-GE-B20-xx" (ASCII)
56-59	4	Vendor rev	Revision level for part number
60-62	3	Reserved
63	1	CCID	Least significant byte of sum of data in address 0-62
Extended ID Fields
64-65	2	Option	Indicates which optical SFP signals are implemented (001Ah = LOS, TX_FAULT, TX_DISABLE all supported)
66	1	BR, max	Upper bit rate margin, units of %
67	1	BR, min	Lower bit rate margin, units of %
68-83	16	Vendor SN	Serial number (ASCII)
84-91	8	Date code	COMELINK's Manufacturing date code
92-94	3	Reserved
95	1	CCEX	Check code for the extended ID Fields (addresses 64 to 94)
Vendor Specific ID Fields
96-127	32	Readable	COMELINK specific date, read only
128-255	128	Reserved	Reserved for SFF-8079

 

   Digital Diagnostic Monitor Characteristics

Data Address	Parameter	Accuracy	Unit
96-97	Transceiver Internal Temperature	±3.0	°C
100-101	Laser Bias Current	±10	%
100-101	Tx Output Power	±3.0	dBm
100-101	Rx Input Power	±3.0	dBm
100-101	VCC3 Internal Supply Voltage	±3.0	%

 

   Regulatory Compliance

Electrostatic Discharge (ESD) to the Electrical Pins	MIL-STD-883E Method 3015.7	Class 1(>1000 V)
Electrostatic Discharge (ESD) to the Single LC Receptacle	IEC 61000-4-2 GR-1089-CORE	Compatible with standards
Electromagnetic Interference (EMI)	FCC Part 15 Class B EN55022 Class B (CISPR 22B) VCCI Class B	Compatible with standards
Laser Eye Safety	FDA 21CFR 1040.10 and 1040.11 EN60950, EN (IEC) 60825-1,2	Compatible with Class 1 laser product.

 

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