Class B+ ONU Transceiver

Model NO.: GPON Class B+ ONU Transceiver 1244Mbps Upstream / 2488Mbps Downstream

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Product Description

- Specification -

Table 1-Optical and Electrical Characteristics

Parameter		Symbol	Min	Typical	Max	Unit	Notes
Transmitter
Data Rate				1.25		Gb/S
Centre Wavelength		λc	1480		1500	nm
Spectral Width		?λ		0.4	1	nm
Side Mode Suppression Ratio		SMSR	30			dB
Average Output Power(BOL)		Pout	3		7	dBm	1
Average Output Power(EOL)		Pout	2		7	dBm	1
Extinction Ratio		ER	9			dB
Average Launch Power-OFF Transmitter		Poff			-40	dBm
Optical Eye Diagram		Compliant with IEEE802.3ah-2004 PX20
Optical Rise/Fall Time(20%~80%)		tr/tf			260	ps
Data Input Swing Differential		VIN	200		2400	mV	2
Input Differential Impedance		ZIN	90	100	110	Ω
TX Disable	Disable		2		Vcc	V
TX Disable	Enable		0		0.8	V
TX Fault	Fault		2		Vcc	V
TX Fault	Normal		0		0.8	V
Receiver
Data Rate				1.25		Gb/S
Centre Wavelength		λc	1260		1360	nm
Receiver Sensitivity		Sen			-28	dBm	3
Receiver Overload		Sat	-6			dBm	3
Receiver Burst Dynamic Range			22			dB
Receiver Reflectance					-20	dB
Data Output Voltage-High		VOH	VccR-1.05		VccR – 0.85	V	4
Data Output Voltage-Low		VOL	VccR-1.84		VccR – 1.60	V	4
LOS De-assert Level		LOS_D			-29	dBm
LOS Assert Level		LOS_A	-45			dBm
LOS Detect Hysteresis			1			dBm
LOS_Det High			2		VCC	V
LOS_Det Low			0		0.8	V
LOS De-assert Time		LOS_D T			500	ns
LOS Assert Time		LOS_A T			500	ns
Reciever Power DDM(RSSI)Error		RXDDM			+/-3	dBm

Notes:

Plug Seq.:Pin engagement sequence during hot plugging.

1)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 0.8V.

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 4.7k~10kΩ resistor.Its states are:

Low(0 to 0.8V): Transmitter on

(>0.8V,<2.0V): Undefined

High(2.0 to 3.465V): Transmitter Disable

Open: Transmitter Disabled

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 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

4)LOS(Loss of Signal)is an open collector/drain output,which should be pulled up with a 4.7K – 10KΩ resistor.Pull up voltage between 2.0V and VccT,R+0.3V.When high,this output indicates the received optical power is below the worst-case receiver sensitivity(as defined by the standard in use).Low indicates normal operation.In the low state,the output will be pulled to<0.8V.

5)RD-/+:These are the differential receiver outputs.They are internally DC-coupled 100 differential lines which should be terminated with 100Ω(differential)at the user SERDES.

6)TD-/+:These are the differential transmitter inputs.They are internally AC-coupled,differential lines with 100Ω differential termination inside the module.

Table 2-Product selection

Wavelength	xx or yy	Clasp Color Code	Wavelength	xx or yy	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
1330nm	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

Ordering information

Product part	Data Rate	Wavelength(nm)	Temperature
Number	(Mbps)	Tx（Rx）	Range（℃）(Tcase)
XTY-U3432-20DA-1	1244Mbps Upstream/	1490(1310)	0~70
	2488Mbps Downstream
XTY-U3432-20DA-2	1244Mbps Upstream/	1490(1310)	-40~85