4.25Gb/s CWDM Single-mode SFP Transceiver

4.25Gb/s CWDM SFP Optical Module A cost-effective solution designed for 4GFC storage networks (SANs) and CWDM wavelength division systems for: Enterprise storage networks (EMC, NetApp, IBM SAN) Data Centre Interconnect (DCI) CWDM private line networks

Specification

Resources

4.25G 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.

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.

Features

Low power dissipation

Up to 4.25Gb/s data links

Hot-pluggable SFP footprint

Single +3.3V power supply

Up to 40km on 9/125µm SMF

Metal enclosure, for lower EMI

RoHS compliant and lead-free

DFB laser transmitter and PIN receiver

Support Digital Diagnostic Monitoring interface

Duplex LC/UPC type pluggable optical interface

Compliant with SFF-8472

Case operating temperature

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

Application

4xFC at 4.25Gbps

2xFC at 2.125 Gbps

1xFC at 1.0625Gbps

1000 Base-LX Ethernet

Electric Pin Descriptions

Figure2. Pin out of Connector Block on Host Board

Pin	Symbol	Name/Description	NOTE
1	VEET	Transmitter Ground (Common with Receiver Ground)	1
2	TFAULT	Transmitter Fault.
3	TDIS	Transmitter Disable. Laser output disabled on high or open.	2
4	MOD_DEF(2)	Module Definition 2. Data line for Serial ID.	3
5	MOD_DEF(1)	Module Definition 1. Clock line for Serial ID.	3
6	MOD_DEF(0)	Module Definition 0. Grounded within the module.	3
7	Rate Select	No connection required	4
8	LOS	Loss of Signal indication. Logic 0 indicates normal operation.	5
9	VEER	Receiver Ground (Common with Transmitter Ground)	1
10	VEER	Receiver Ground (Common with Transmitter Ground)	1
11	VEER	Receiver Ground (Common with Transmitter Ground)	1
12	RD-	Receiver Inverted DATA out. AC Coupled
13	RD+	Receiver Non-inverted DATA out. AC Coupled
14	VEER	Receiver Ground (Common with Transmitter Ground)	1
15	VCCR	Receiver Power Supply
16	VCCT	Transmitter Power Supply
17	VEET	Transmitter Ground (Common with Receiver Ground)	1
18	TD+	Transmitter Non-Inverted DATA in. AC Coupled.
19	TD-	Transmitter Inverted DATA in. AC Coupled.
20	VEET	Transmitter Ground (Common with Receiver 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 - 10kohms 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. This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates).If implemented, the input will be internally pulled down with > 30kΩ resistor. The input states are:

□ Low (0 – 0.8V): Reduced Bandwidth

□ (>0.8, < 2.0V): Undefined

□ High (2.0 – 3.465V): Full Bandwidth

□ Open: Reduced Bandwidth

5. LOS is open collector output should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.

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
Case Operating Temperature	Tcase	-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	LVTTL

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

Mechanical Specifications (Unit: mm)

Ordering Information

Product part Number

Data Rate (Mbps)

Media

Transmission Distance(km)

Temperature Range

（Tcase）（℃）

HC-SF-CXX42-40C

4250

Single mode fiber

0~70

commercial

HC-SF-CXX42-40I

4250

Single mode fiber

-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

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Resources

4.25Gb/s CWDM Single-mode SFP Transceiver