WDS5441H-C(H)3AL

 GEPON OLT SFP Transceiver, 1000BASE-PX20+++ , 7dBi

 

 

General Description

 

WDS5441H-C(H)3AL is a high performance transceiver  module  for  single  fiber communications  using  a  1490nm continuous-mode transmitter and a 1310nm burst-mode receiver. It is designed to meet CTC 3.0 and IEEE802.3ah -2004 1000BASE- PX20+++ applications.

The transmitter has automatic power control (APC) function and temperature compensation circuitry to ensure stable optical power output and extinction ratio over all operating temperature range. The transmitter meets Class 1 eye safety per IEC825 and CDRH standards.

The receiver has a hermetically packaged APD-TIA (trans-impedance amplifier) pre-amplifier and a limiting amplifier with LVPECL compatible differential outputs. It features a burst-mode Loss of signal (LOS) output which is LVTTL compatible. The receiver offers bust-mode RSSI outputs, which is I2C

accessible digitized data stored in the internal flash memory.

The module provides digital diagnostic information of its operating conditions and status, including transmitting power, laser bias current, module temperature, supply voltage, and burst-mode receiving power. Calibration and alarm/warning threshold data are written and stored in the internal memory (EEPROM). The memory map is compatible with SFF-8472.

 

Features

 

z  Single fiber bi-directional data links application with 1.25Gbps upstream and 1.25Gbps downstream. z 1490nm continuous mode DFB transmitter.

z  1310nm burst mode APD-TIA receiver. z High power 1550nm video signal rejection . z 0 to 70°C and -40 to 85°C operating case temperature. z SFP package with SC/UPC receptacle. z Single +3.3V power supply.  z LVPECL interface logic level for data input and output. z LVTTL transmitter disable control

 

z  LVTTL transmitter laser failure alarm z LVTTL receiver Loss of Signal (LOS) indication z LVTTL RSSI Trigger control z Low EMI and excellent ESD protection z ClassⅠlaser safety standard IEC-60825 compliant z Complies with RoHS-6

Applications

 

z  Gigabit Ethernet Passive Optical Networks(GEPON) – OLT side

 

Standard

z Compliant with SFF MSA – 2000

z Compliant with SFF-8472 Rev.11.0

z Compliant with IEEE 802.3ah-2004

z Compliant with FCC 47 CFR Part 15, Class B

z Compliant with FDA 21 CFR 1040.10 and 1040.11, ClassⅠ

z Complies with China Telecom EPON equipment technology requirement V3.0

 

Absolute Maximum Ratings

 

Parameter	Symbol	Minim	Maxim	Unit	Note
Storage Ambient Temperature	TSTG	-40	85	°C
Operating Case Temperature	Tc	-10	75	°C	C-Temp
Operating Case Temperature	Tc	-40	90	°C	I-Temp
Operating Humidity	OH	5	95	%
Power Supply Voltage	VCC	0	4	V
Receiver Damaged Threshold			4	dBm
Soldering Temperature			260/10	°C/S

 

Recommended Operating Conditions

 

Parameter	Symbol	Minim	Typical	Maxim	Unit	Note
Power Supply Voltage	VCC	3.13	3.3	3.47	V	3.3V±5%
Parameter	Symbol	Minim	Typical	Maxim	Unit	Note
Operating Current	Icc			400	mA
Operating Case Temperature	Tc	0		70	°C	C-Temp
Operating Case Temperature	Tc	-40		85	°C	I-Temp
Operating Humidity Range	OH	5		85	%
Data Rate upstream			1.25		Gbit/s
Data Rate downstream			1.25		Gbit/s
Data Rate Drift		-100		+100	PPM

Transmitter Optical and Electrical Characteristics

 

Parameter	Symb	Minum	Typical	Maxim	Unit	Note
Optical Center Wavelength	λC	1480	1490	1500	nm
Side Mode Suppression Ratio	SMSR	30			dB
Optical Spectrum Width	∆λ			1	nm
Average Launch Optical Power	Po	+2.5		+7	dBm	1
Power-OFF Transmitter Optical Power	Poff			-41	dBm
Extinction Ratio	ER	9			dB	2
Rise/Fall Time (20%-80%)	TR/TF			260	ps	2,3
Optical Return Loss Tolerance				15	dB
Transmitter Reflectance				-10	dB
Transmitter and Dispersion Penalty	TDP			2.3	dB	4
Optical Waveform Diagram	Compliant With IEEE Std 802.3ah™ -2004 Figure 60-6
Data Input Differential Swing	Vinp-p	200		2400	mV	5
Input Differential Impedance	Zin	90	100	110	Ω
Transmitter Fault Indication Voltage-Low	VTx_F-L			0.4	V
Transmitter Fault Indication Voltage-Hight	VTx_F-H	2.4			V
Transmitter enable control Voltage – Low	Ven-L	0		0.8	V
Transmitter disable control Voltage – High	Vdis-H	2.0		VCC	V
TX Disable Negate time	Tx_on			1	ms	6
TX Disable Assert time	Tx_off			10	us	6

Note 1: Launched into 9/125um Single Mode Fiber.

Note 2: Measured with PRBS 2⁷-1 test pattern @1.25Gbit/s.

Note 3: Measured with the Bessel-Thompson filter OFF.

Note 4: Maximum sensitivity penalty due to transmitter and dispersion effect through 20km of SMF optical fiber.

Note 5: Compatible with LVPECL input, AC coupled internally.

Note 6: Transmitter enable and disable timing

 

Receiver Optical and Electrical Characteristics

 

Parameter	Symbol	Minum	Typical	Maxim	Unit	Notes
Operating Wavelength	λC	1260	1310	1360	nm
Sensitivity	SEN			-30	dBm	1
Saturation Optical Power	SAT	-6			dBm
Receiver burst_mode dynamic		15			dB	2
Burst LOS Assert	LOSL-H	-45			dBm	3
Burst LOS De-assert Level	LOSH-L			-31	dBm
Burst LOS Assert time	TLOSA			500	ns	Figure 2
Burst LOS Deassert time	TLOSD			500	ns
Receiver Reflectance				-20	dB	@1310nm
Data Output Voltage-High	Vout_H	Vcc-1085		Vcc-880	mV	4
Data Output Voltage-Low	Vout_L	Vcc-1830		Vcc-1620	mV
LOS Voltage – Low	LOS_L	0		0.4	V
LOS Voltage – High	LOS_H	2.4		VCC	V
RSSI accuracy		-3		+3	dB	5

Note 1: Measured with a PRBS 2⁷-1 test pattern @1.25Gbit/s and ER=10dB, BER =10^-12.

Note 2: Input optical power level difference of adjacent burst packets.

Note 3: Low level indicates that burst packet is detected by the receiver.

Note 4: LVPECL output, DC coupled internally, guaranteed in the full range of input optical power (-6dBm

to -30dBm)

Note 5: RSSI DDM accuracy is better than +/-2dB (25℃) or +/-3dB (0℃~70℃) for input power levels between -6 to -30 dBm. Measured with 1310nm, 1.25Gbps PRBS27-1 burst-mode optical input, ER=10dB, 50%duty cycle.

 

 

LOS Timing characteristics

 

 

 

The Timing characteristics for RSSI

 

Figure 3  RSSI vs Trigger timing 

 

Parameter	Symbol	Minum	Typical	Maxim	Unit	Note
ONT signal width	Tont	1000			ns
Trigger Delay	TTD		500		ns
Trigger width	TTW		500		ns
Time for Sample and IIC time	TS		500		µs

 

Digital Diagnostic Monitor Accuracy

 

Parameter	Accuracy	Calibration	Notes
Temp report	±3℃	Internal	Case Temp ±3℃
Voltage report	±3%	Internal	Vcc=3.13~3.47V
Ibias report	±10%	Internal
Optical power output report	±2dB	Internal	Average power
RSSI	±3dB	Internal	Input power levels between -6 to -30 dBm

Pin Description

 

PIN	Name	Description	Notes
1	VeeT	Transmitter Ground
2	TX Fault	Transmitter Fault indication	Note 1
3	TX Disable	Transmitter Disable	Note 2
4	SDA	I2C data line	Note 3
5	SCL	I2C clock line	Note 3
6	MOD-DEF0	Module Definition0	Note 3, internal grounded
7	RSSI Trigger	Receiver reset	Note 4
8	LOS	Loss of Signal	Note 5
9	VeeR	Receiver Ground
10	VeeR	Receiver Ground
11	VeeR	Receiver Ground
12	RD-	Inv.Receiver Data Out	Note 6
13	RD+	Receiver Data Out
14	VeeR	Receiver Ground
15	VccR	Receiver Power	Note 7, Supply 3.3V±5%
16	VccT	Transmitter Power	Note 7, Supply 3.3V±5%
17	VeeT	Transmitter Ground
18	TD+	Transmitter Data Input	Note 8
19	TD-	Transmitter Inv. Data Input
20	VeeT	Transmitter Ground

 

Note: 

1. TX Fault is an open collector/drain output, which should be pulled up with a 4.7K–10KΩ resistor on the host board. Pull up voltage between 2.0V to VccT+0.3V or VccR+0.3V. High output indicates a laser fault of some kinds. Low indicates normal operation. In the low state, the output voltage will be below 0.8V.
2. TX disable is an input that is used to control the transmitter power output. It is pulled up within the module with a 4.7–10 KΩ resistor. Its states are: Low (0 – 0.8V): Transmitter on; (>0.8, < 2.0V):

Undefined; High (2.0 – Vcc): Transmitter Disabled Open: Transmitter Disabled

1. These pins 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.

1. RSSI TRIG is a LVTTL input. Assert high after 500ns delay time of the beginning of the monitored burst package,at least 500ns in duration.
2. LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor to VccT +0.3V or VccR+0.3V. Low level indicates that burst packet is detected by the

receiver.

1. RD-/+: These are the differential receiver outputs. They are DC coupled 100Ω differential line

which should be terminated with 100Ω (differential) at the user SER.DES.

1. VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP connector pin. Maximum supply current is 400mA. Recommended host board power supply

filtering is shown interface circuit. Inductors with DC resistance of less than 1Ω, in order to insure the voltage at the SFP input pin with 3.3V. When the recommended supply filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30 mA greater than the steady state value. VccR and VccT may be internally connected within the SFP transceiver

module.

1. TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.