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产品详情HD-GP-OLT-20-C++GPONClassC++SFPOLTTransceiverwithDigitalRSSI1Features1

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产品详情

HD-GP-OLT-20-C++

GPON Class C++ SFP OLT Transceiver with Digital RSSI

1 Features

1.1 Single Fiber Transceiver with single mode SC receptacle 1490nm continuous-mode 2.488Gb/s DFB transmitter 1310nm burst-mode 1.244Gb/s APD receiver

1.2 Complies with ITU-T G.984.2

1.3 Digital Diagnostic Monitoring (DDM) with external calibrations

1.4 LVPECL compatible data input /output

1.5 LVTTL for Tx disable input and Tx_fault output

1.6 LVTTL receiver Fast Burst Packet Detect indication

1.7 Burst mode received signal strength indication (RSSI) function

1.8 Complies with RoHS directive (2002/95/EC)

2 Applications

Gigabit Passive Optical Network (GPON) OLT

3 General

This is a high performance transceiver module for single fiber communications.It is designed to meet ITU G.984.2 requirements for optical line terminal (OLT) applications.

The 1490nm DFB LD transmitter has automatic power control (APC) function and temperature compensation circuitry to ensure stable optical power and extinction ratio over all operating temperature range. The transmitter meets Class 1 eye safety per IEC60825 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 Packet Detect (SD) output which is LVTTL compatible. The SD output will come high after receiving the burst packet.

The module provides digital diagnostic information of its operating conditions and status, including transmitting power, laser bias current, module temperature, and supply voltage.

4 Performance Specifications

4.1 Absolute Maximum Ratings

Parameter		Symbol	Min.	Max.	Unit
Storage Temperature		Tst	-40	+85	°C

Operating relative humidity		RH	5	90	%
(Non- condensing)		RH	5	90	%
(Non- condensing)

Case Temperature (Operating)		T_C	0	70	°C
Input Voltage	-		GND	Vcc	V

Power Supply Voltage		Vcc	0	3.6	V

4.2 Recommended Operating Environment


Parameter			Symbol			Min.	Typ.		Max.	Unit
Power Supply Voltage				Vcc		+3.14	+3.3	+3.46		V

Power Supply Current				Icc		-	360	500		mA

Operating relative humidity				RH		5		85		%
(Non- condensing)				RH		5		85		%
(Non- condensing)

Case Temperature (Operating)				TC		0	-	70		°C

I2C clock frequency						-	100	400		KHz

Power consumption Max			-			-	-	1.65		W

4.3 1490nm Digital Transmitter E-O Characteristics

Parameter		Symbol		Min.		Typ.	Max.		Unit	Note
Support data rate	-				2.488				Gb/s	-

Center Wavelength		l		1480	1490		1500		nm

Spectral Width (-20dB)		Dl		-	-		1		nm

Side Mode Suppression Ratio		SMSR		30					dB	4.3.1

Average Optical Output Power		Po		6	-		10		dBm

Extinction Ratio		Er		8.2	-		-		dB

Output Power with Transmitter		Poff					-39		dBm
Disabled		Poff					-39		dBm
Disabled

Output Eye Diagram				Compliant with ITU-T G.984.2 Mask

Differential Input Voltage		VID		600			1600		mV

Differential Input Impedance	-			80	100		120		Ω
Note 4.3.1: 2.488Gbps continuous-mode , PRBS2²³-1
4.4 1310 Burst-Mode Receiver Characteristics O-E Characteristics

Parameter	Symbol			Min.	Typ.		Max.	Units		Note
										s

Support data rate					1.244			Gb/s

Wavelength of Operation	-			1290	1310		1330		nm	-

Receiver Sensitivity		Sen.		-	-		-30		dBm	4.4.1
Receiver Sensitivity		Sen.		-	-		-30		dBm

Saturation Optical Power		Sat		-12	-		-		dBm	4.4.1

Data Output Voltage - High		VOH		VccR	-		VccR –		V	-
Data Output Voltage - High		VOH		-1.05	-		0.85		V	-
				-1.05			0.85

Data Output Voltage - Low		VOL		VccR	-		VccR –		V	-
Data Output Voltage - Low		VOL		-1.84	-		1.60		V	-
				-1.84			1.60

Note4.4.1: Measured with 1310nm, 1.244Gbps PRBS2²³-1, burst-mode optical input, ER=10dB, BER=1x10^-10, Single burst packet length is 40us and packet interval is 40us.

4.5 Digital Diagnostic Monitoring Characteristics

Parameter

Symbol

Range

Accuracy

Transceiver Case

Measured transceiver case temperature over

±3°C

Temperature

specified operating range

Vcc

Internally measured transceiver supply

±3%

Supply Voltage

voltage ,3.0~3.6V

TX Bias Current

Measured TX Bias current in uA

±10%

TX Output Power

Measured TX Output Power in dBm Over the

±2dB

specified output power range

Received Optical Power

Measured RX Received Power in dBm Over the

±3dB

specified input power range, -10~-32dBm,

4.6 Timing Characteristics for Digital RSSI

图片.png

PARAMETER	SYMBOL	MIN	TYP	MAX	UNITS

ONU Optical Signal Length	Tont	350	-	-	ns

RSSI Trigger Delay	Ttri	0	50	-	ns

RSSI Trigger Signal Width	Tw	300	350	Tont- Ttri	ns

I2C read time	Tp	-	-	500	us

5 EEPROM Section

图片.png

6 Pin Definitions

6.1 Pin Diagram

图片.png

6.2 Pin Descriptions

Pin#

Logic

Name

Function

Notes

VeeT

Transmitter Ground

Note 7

LVTTL

TX_Fault

Transmitter Fault Indication

Note 1

LVTTL

TX_Disable

Transmitter Disable

Note 2

SDA

C Data

Note 3

SCL

C Clock

Note 3

MOD-DEF(0)

Internally grounded

LVTTL

Reset

Receiver Reset

Note 4

LVTTL

Burst Packet Detect

Note 5

RSSI_Trigger

RSSI Trigger Signal from Host

Note 6

VeeR

Receiver Ground

Note7

VeeR

Receiver Ground

Note 7

RD-

Inv. Received Data Out

Note 8

RD+

Received Data Out

Note 8

VeeR

Receiver Ground

Note 7

VccR

Receiver Power

Note 9

VccT

Transmitter Power

Note 9

VeeT

Transmitter Ground

Note 7

TD+

Transmit Data In

Note 10

TD-

Inv. Transmit Data In

Note 10

VeeT

Transmitter Ground

Note 7

Notes:

1. TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the hostboard 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 4.7–10 KΩ resistor. It’s states are:

Low (0 – 0.8V): Transmitter on

(>0.8, < 2.0V): Undefined

High (2.0 – 3.465V): Transmitter Disabled

Open: Transmitter Disabled .

3. SDA and SCL is communication interface for I2C . They should be pulled up with a 4.7K – 10KΩ resistor on the host board. The pull-up voltage should be Vcc.

4. Reset is a LVTTL input which is used to clear receiver status before receiving the next burst packet.

5. BPD is a LVTTL output. High level indicates that burst packet is detected by the receiver.

6. RSSI_Trigger is a LVTTL input from host for starting ADC of digital RSSI circuit to sample the analog RSSI signal.

7. Vee is connected inside the SFP OLT transceiver.

8. RD- and RD+ are LVPECL differential outputs of the receiver, and externally DC-coupled to 100Ω differential lines at the user host board.

9. Vcc is the receiver and transmitter power supply, respectively. They are defined as 3.3V ±5% at the SFP connector pin. Maximum suppl in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. Vcc is internally connected inside the SFP OLT transceiver.

10. TD- and TD+ are the differential transmitter inputs. They are AC coupled differential lines with 100 Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board.

7 Outline Dimensions

图片.png

8 Recommended Circuit

				VCCT				VCC
		TX_Disable(3)		4.7K~10K			TX_Fault(2)	4.7K~10K
							TX_Fault(2)
	VCC			Laser		TD+(18)			Z=50
		1uH							Z=50
		1uH	VccR(15)		100
			VccR(15)	Driver	100	TD-(19)
				Driver		TD-(19)			Z=50
									Z=50
		10uF	0.1uF						VCC
		10uF	0.1uF
							RD-(12)	130
							RD-(12)		Z=50
				Limited					Z=50
				Limited			RD+(13)
				Amplifier			RD+(13)		Z=50
									Z=50
			Reset (7)					82
			Reset (7)
						BPD(8)
				MCU			SCL(5)
	VCC	1uH	VccT(16)	MCU			SDA(4)
			VccT(16)

								4.7K~10K
		10uF	0.1uF						VCC
							RSSI-Trigger(9)		VCC
				OLT SFP			RSSI-Trigger(9)
				OLT SFP
9	Ordering Information
	Part Number			Operating Case Temperature				RoHS Compliant
	HD-GP-OLT-20-C++			0 ~ 70 °C					RoHS-6
10	Document History
Version			Change Description				Changed by		Date
VER A		Initial Release					Mr.Wang		05/16/2017