APPLICATIONS

●Gigabit Ethernet

●Fiber Channel●Switch to Switch interface

●Switched backplane applications ●Router/Server interface

●Other Optical Links

 

PRODUCT DESCRIPTIONS

The SFP-BIDI transceivers are high performance, cost effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 40km transmission distance with SMF.

The transceiver consists of three sections: a DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.   The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.  

Ordering information

Data Rate (Mbps)	Media	Wavelength (nm)	Transmission Distance(km)	Temperature Range （Tcase）（℃）
1250	Single mode fiber	1310/1550(1550/1310)	40	0~70	commercial
1250	Single mode fiber	1310/1550(1550/1310)	40	-10~80	extended
1250	Single mode fiber	1310/1550(1550/1310)	40	-45~85	industrial

 

ABSOLUTE MAXIMUM RATINGS

Parameter	Symbol	Min.	Max.	Unit	Note
Supply Voltage	Vcc	-0.5	4.0	V
Storage Temperature		-40	85	°C
Relative Humidity		5	85	%

 

Note: Stress in excess of the maximum absolute ratings can cause permanent damage to the module

GERERAL OPERATING CHARACTERISTICS

Parameter	Symbol	Min.	Typ	Max.	Unit	Note
Data Rate			1250		Mb/s
Supply Voltage	Vcc	3.13	3.3	3.47	V
Supply Current	Icc5			220	mA
Operating Case Temp.	Tc	0		70	°C
		-10		80	°C
		-40		85	°C

 

ELECTRICAL INPUT/OUTPUT CHARACTERISTICS

l Transmitter

Parameter		Symbol	Min.	Typ	Max.	Unit	Note
Diff. input voltage swing			120		820	mVpp	1
Tx Disable input	H	VIH	2.0		Vcc+0.3	V
	L	VIL	0		0.8
Tx Fault output	H	VOH	2.0		Vcc+0.3	V	2
	L	VOL	0		0.8
Input Diff. Impedance		Zin		100		Ω

 

 

 

l Receiver

Parameter		Symbol	Min.	Typ	Max.	Unit	Note
Diff. output voltage swing			340	650	800	mVpp	3
Rx LOS Output	H	VOH	2.0		Vcc+0.3	V	2
	L	VOL	0		0.8

 

Note 1) TD+/- are internally AC coupled with 100Ω differential termination inside the module.

Note 2) Tx Fault and Rx LOS are open collector outputs, which should be pulled up with 4.7k to 10kΩ resistors on the host board. Pull up voltage between 2.0V and Vcc+0.3V.

Note 3) RD+/- outputs are internally AC coupled, and should be terminated with 100Ω (differential) at the user SERDES

.OPTICAL CHARACTERISTICS

 

l Transmitter

 

arameter	Symbol	Min.	Typ	Max.	Unit	Note
Operating Wavelength	λC	1270	1310	1360	nm
		1500	1550	1570
Ave. output power (Enabled)	Po	-5		0	dBm	1
Extinction Ratio	ER	9			dB	1
RMS   spectral width	Δλ			4	nm
Rise/Fall time (20%~80%)	Tr/Tf			0.26	ps	2
Output Eye Mask	Compliant with IEEE802.3 z (class 1 laser safety)

Note (1): Measure at 2^23-1 NRZ PRBS pattern

Note (2): Transmitter eye mask definition

 

l Receiver

 

Parameter	Symbol	Min.	Typ	Max.	Unit	Note
Operating Wavelength		1530	1550	1570	nm
		1270	1310	1360
Sensitivity	Psen			-22	dBm	1
Min. overload	Pimax	-3			dBm
LOS Assert	Pa	-35			dBm
LOS De-assert	Pd			-23	dBm	2
LOS Hysteresis	Pd-Pa	0.5		6	dB

 

Note (1): Measured with Light source 1550nm(1310nm), ER=9dB; BER =<10^-12 @PRBS=2^23-1 NRZ.

Note (2): When LOS de-asserted, the RX data+/- output is signal output.

Pin Definitions and Functions

  

 

PIN#	Name	Function	Notes
1	VeeT	Tx ground
2	Tx Fault	Tx fault indication, Open Collector Output, active “H”	1
3	Tx Disable	LVTTL Input, internal pull-up, Tx disabled on “H”	2
4	MOD-DEF2	2 wire serial interface data input/output (SDA)	3
5	MOD-DEF1	2 wire serial interface clock input (SCL)	3
6	MOD-DEF0	Model present indication	3
7	Rate select	No connection
8	LOS	Rx loss of signal, Open Collector Output, active “H”	4
9	VeeR	Rx ground
10	VeeR	Rx ground
11	VeeR	Rx ground
12	RD-	Inverse received data out	5
13	RD+	Received data out	5
14	VeeR	Rx ground
15	VccR	Rx power supply
16	VccT	Tx power supply
17	VeeT	Tx ground
18	TD+	Transmit data in	6
19	TD-	Inverse transmit data in	6
20	VeeT	Tx ground

 

 

 

Note 1) When high, this output indicates a laser fault of some kind. Low indicates normal operation. And should be pulled up with a 4.7 – 10KΩ resistor on the host board.

 

Note 2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7 – 10KΩ resistor. Its states are:

Low (0 – 0.8V): Transmitter on               (>0.8, < 2.0V): Undefined

High (2.0V~Vcc+0.3V): Transmitter Disabled  Open: Transmitter Disabled

Note 3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10KΩ resistor on the host board. The pull-up voltage shall be VccT or VccR.  

        Mod-Def 0 has been grounded by the module to indicate that the module is present

        Mod-Def 1 is the clock line of two wire serial interface for serial ID

        Mod-Def 2 is the data line of two wire serial interface for serial ID

 

Note 4) When high, this output indicates loss of signal (LOS). Low indicates normal operation.

 

Note 5) RD+/-: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board.

 

Note 6) TD+/-: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.

Diagnostics

Diagnostics Specification

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70  -40 to +85	°C	±3°C	Internal/ External
Voltage	3.0 to 3.6	V	±3%	Internal/ External
Bias Current	2 to 80	mA	±10%	Internal/ External
TX Power	-8 to 3	dBm	±3dB	Internal/ External
RX Power	-25 to 0	dBm	±3dB	Internal/ External

Ordering Information & Related Products

SFP BIDI,LC,Tx1310/Rx1550nm 1.25Gbps, 40km, with DDM

SFP BIDI,LC,Tx1550/Rx1310nm 1.25Gbps, 40km, with DDM

SFP BIDI,LC,Tx1310/Rx1550nm 1.25Gbps, 40km, without DDM

SFP BIDI,LC,Tx1550/Rx1310nm 1.25Gbps, 40km, without DDM