Description

PDF : Goxs-1312-40d-sfp-1-25g-module-40km-single-mode

                          GOXS-1312-40D

1.25Gbps SFP Optical Transceiver, 40km Reach

Features

• Dual data-rate of 25Gbps/1.063Gbps operation
• 1310nm DFB laser and PIN photo detector for 40km transmission
• Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
• Digital Diagnostic Monitoring:

Internal Calibration or External Calibration

• Compatible with SONET OC-24-LR
• Compatible with RoHS

l    +3.3V single power supply

• Operating case temperature: Standard : 0 to +70°C Industrial : -40 to +85°C

Applications

• Gigabit Ethernet
• Fiber Channel
• Switch to Switch interface
• Switched backplane applications
• Router/Server interface
• Other optical transmission systems

Description

The SFP 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.

Absolute Maximum Ratings

Table 1 – Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	-0.5	4.5	V
Storage Temperature	Ts	-40	+85	°C
Operating Humidity	–	5	85	%

  

Recommended Operating Conditions

Table 2 – Recommended Operating Conditions 

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	Tc	0		+70	°C
	Industrial		-40		+85	°C
Power Supply Voltage		Vcc	3.13	3.3	3.47	V
Power Supply Current		Icc			300	mA
Data Rate				1.25		Gbps

 

Optical and Electrical Characteristics

GOCS-1312-40 :    (DFB and PIN, 1310nm, 40km Reach)

Table 3 – Optical and Electrical Characteristics

Parameter		Symbol		Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength			λc	1260	1310	1360	nm
Spectral Width (-20dB)			∆λ			1	nm
Side Mode Suppression Ratio			SMSR	30			dB
Average Output Power			Pout	-5		2	dBm	1
Extinction Ratio			ER	9			dB
Optical Rise/Fall Time (20%~80%)			tr/tf			0.26	ns
Data Input Swing Differential			VIN	400		1800	mV	2
Input Differential Impedance			ZIN	90	100	110	Ω
TX Disable	Disable			2.0		Vcc	V
	Enable			0		0.8	V
TX Fault	Fault			2.0		Vcc	V
	Normal			0		0.8	V
Receiver
Centre Wavelength			λc	1260		1360	nm
Receiver Sensitivity						-23	dBm	3
Receiver Overload				-3			dBm	3
LOS De-Assert			LOSD			-24	dBm
LOS Assert			LOSA	-35			dBm
LOS Hysteresis				1		4	dB
Data Output Swing Differential			Vout	370		1800	mV	4
LOS			High	2.0		Vcc	V
			Low			0.8	V

Notes:

1. The optical power is launched into
2. PECL input, internally AC-coupled and
3. Measured with a PRBS 2⁷-1 test pattern @1250Mbps, BER ≤1×10^-12.
4. Internally AC-coupled.

Timing and Electrical

Table 4 – Timing and Electrical

Parameter	Symbol	Min	Typical	Max	Unit
Tx Disable Negate Time	t_on			1	ms
Tx Disable Assert Time	t_off			10	µs
Time To Initialize, including Reset of Tx Fault	t_init			300	ms
Tx Fault Assert Time	t_fault			100	µs
Tx Disable To Reset	t_reset	10			µs
LOS Assert Time	t_loss_on			100	µs
LOS De-assert Time	t_loss_off			100	µs
Serial ID Clock Rate	f_serial_clock			400	KHz
MOD_DEF (0:2)-High	VH	2		Vcc	V
MOD_DEF (0:2)-Low	VL			0.8	V

 

 Diagnostics

Table 5 – Diagnostics Specification

Parameter	Range	Unit	Accuracy	Calibration
Temperature	0 to +70	°C	±3°C	Internal / External
	-40 to +85
Voltage	3.0 to 3.6	V	±3%	Internal / External
Bias Current	0 to 100	mA	±10%	Internal / External
TX Power	-5 to +2	dBm	±3dB	Internal / External
RX Power	-23 to -3	dBm	±3dB	Internal / External

 

Pin Descriptions

Pin	Signal Name	Description	Plug Seq.	Notes
1	VEET	Transmitter Ground	1
2	TX FAULT	Transmitter Fault Indication	3	Note 1
3	TX DISABLE	Transmitter Disable	3	Note 2
4	MOD_DEF(2)	SDA Serial Data Signal	3	Note 3
5	MOD_DEF(1)	SCL Serial Clock Signal	3	Note 3
6	MOD_DEF(0)	TTL Low	3	Note 3
7	Rate Select	Not Connected	3
8	LOS	Loss of Signal	3	Note 4
9	VEER	Receiver ground	1
10	VEER	Receiver ground	1
11	VEER	Receiver ground	1
12	RD-	Inv. Received Data Out	3	Note 5
13	RD+	Received Data Out	3	Note 5
14	VEER	Receiver ground	1
15	VCCR	Receiver Power Supply	2
16	VCCT	Transmitter Power Supply	2
17	VEET	Transmitter Ground	1
18	TD+	Transmit Data In	3	Note 6
19	TD-	Inv. Transmit Data In	3	Note 6
20	VEET	Transmitter Ground	1

Notes:

Plug Seq.: Pin engagement sequence during hot plugging.

• TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 8V.
• TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 7k~10kΩ resistor. Its states are:

Low (0 to 0.8V):                          Transmitter on

(>0.8V, < 2.0V):                          Undefined

High (2.0 to 3.465V):                   Transmitter Disabled Open:                                           Transmitter Disabled

• Mod-Def 0,1,2. These are the module definition 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 is 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

• LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.
• RD-/+: These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user
• TD-/+: These are the differential transmitter They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.

 

 

For more information please contact

Whatsapp/Call :8527090690