4.25G CWDM 光模块

The optical output can be disabled by a TTL logic high-level input of Tx Disable, and the system also can disable the module via I2C. Tx Fault is provided to indicate that degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver or the link status with partner. The system can also get the LOS (or Link)/Disable/Fault information via I2C register access.

 

HC’s SF-CXX42-40D(A) Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the DFB laser and the PIN receiver .The module data link up to 40KM in 9/125um single mode fiber.

 

KEY  Features
Up to 4.25Gb/s data links
DFB laser transmitter and PIN receiver
Up to 40km on 9/125µm SMF
Hot-pluggable SFP footprint
Duplex LC/UPC type pluggable optical interface
Low power dissipation
Metal enclosure, for lower EMI
RoHS compliant and lead-free
Single +3.3V power supply
Support Digital Diagnostic Monitoring interface
Compliant with SFF-8472
Case operating temperature
     Commercial: 0°C to +70°C
     Industrial: -40°C to +85°C

 

Application
1000 Base-LX Ethernet
4xFC at 4.25Gbps
2xFC at 2.125 Gbps
1xFC at 1.0625Gbps

 

 

Absolute Maximum Ratings

 

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Storage Temperature	Ts	-40		85	ºC
Relative Humidity	RH	5		95	%
Power Supply Voltage	VCC	-0.5		4	V
Signal Input Voltage		-0.3		Vcc+0.3	V
Receiver Damage Threshold		5			dBm

Recommended Operating Conditions

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Case  Operating Temperature	Tcase	0		70	ºC	Commercial
		-40		85	ºC	Industrial
Power Supply Voltage	VCC	3.13	3.3	3.47	V
Power Supply Current	ICC			300	mA
Power Supply Noise Rejection				100	mVp-p	100Hz to 1MHz
Data Rate			4.25/4.25		Gbps	TX Rate/RX Rate
Transmission Distance				40	KM
Coupled Fiber	Single mode fiber					9/125um SMF

 

 

Specification of Transmitter

 

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Average Output Power	POUT	-1		4	dBm	Note (1)
Extinction Ratio	ER	6			dB
Center Wavelength	λC	(1XX0)-10	1XX0	(1XX0)+10	nm	DFBLaser Note (2) Not(2)
Side Mode Suppression Ratio	SMSR	30			dB
Spectrum Bandwidth(-20dB)	σ			1	nm
Transmitter OFF Output Power	POff			-45	dBm
Differential Line Input Impedance	RIN	90	100	110	Ohm
Output Eye Mask	Compliant with G.957 (class 1 laser safety)				FC-PI requirements

Note:

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

(2):“XX” is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61

   (3): Transmitter eye mask definition

 

 

Specification of Receiver

 

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Input Optical Wavelength	λ IN	1270		1610	nm
Receiver Sensitivity	PIN			-18	dBm	Note (1)
Input Saturation Power (Overload)	PSAT	0.5			dBm
LOS De-assert	LOSD			-19	dBm
LOS Assert	LOSA	-30			dBm	Note (2)
LOS Hysteresis		0.5	2	6	dB

Notes:

(1): Measured with Light source 1XX0 nm, ER=8.2dB; BER =<10^-12 @PRBS=2^23-1 NRZ , “XX” is: 27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59 and 61

(2): When LOS de-asserted, the RX data+/- output is High-level (fixed)

 

 

Electrical Interface Characteristics

 

Parameter	Symbol	Min.	Typ.	Max.	Unit	Note
Transmitter
Total Supply Current	ICC			A	mA	Note (1)
Transmitter Disable Input-High	VDISH	2		Vcc+0.3	V
Transmitter Disable Input-Low	VDISL	0		0.8	V
Transmitter Fault Input-High	VTxFH	2		Vcc+0.3	V
Transmitter Fault Input-Low	VTxFL	0		0.8	V
Receiver
Total Supply Current	ICC			B	mA	Note (1)
LOSS Output Voltage-High	VLOSH	2		Vcc+0.3	V	LVTTL
LOSS Output Voltage-Low	VLOSL	0		0.8	V

Note(1): A (TX) + B (RX) = 360mA        (Not include termination circuit)

 

 

Recommend Circuit Schematic

 

 

 

Mechanical Specifications (Unit: mm)

SF-CXX42-40D(A)

ORDERING INFORMATION

Product part Number	Data Rate (Mbps)	Media	Transmission Distance(km)	Temperature Range（Tcase）（℃）
SF-CXX42-40D	4250	Single mode fiber	40	0~70	commercial
SF-CXX42-40D A	4250	Single mode fiber	40	-40~85	industrial

 

Wavelength	xx	Clasp Color Code	Wavelength	xx	Clasp Color Code
1270 nm	27	Gray	1450 nm	45	Brown
1290 nm	29	Gray	1470 nm	47	Gray
1310 nm	31	Gray	1490 nm	49	Purple
1330 nm	33	Purple	1510 nm	51	Blue
1350 nm	35	Blue	1530 nm	53	Green
1370 nm	37	Green	1550 nm	55	Yellow
1390 nm	39	Yellow	1570 nm	57	Orange
1410 nm	41	Orange	1590 nm	59	Red
1430 nm	43	Red	1610 nm	61	Brown