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SPET-P4311-SE2DA GEPON SFP OLT Transceiver

1550nm 1G fiber optic transceiver

SPET-P4311-SE2DA

GEPON SFP OLT Transceiver

Features
Single Fiber Transceiver with single mode SC receptacle
1490nm continuous-mode 1.25G/s transmitter with DFB laser
1310nm burst-mode 1.25G/s receiver with APD-TIA
Single 3.3V power supply
LVPECL compatible data input /output
Support more than 24dB dynamic range
Continued mode received signal strength indication (RSSI) output
Complies with IEEE Stud 802.3ah™ -2004 1000BASE-PX20
Digital diagnostic interface compliant with SFF-8472 Rev 9.4
Complies with RoHS
Operating case temperature:
Standard: 0 to +70°C

Applications
Gigabit Ethernet Passive Optical Network (GEPON) OLT

Description
The SPET-P4311-SE2DA EPON SFP OLT transceiver is the high performance module for single fiber by using 1490nm continuous-mode transmitter and 1310nm burst-mode receiver. It is optical line terminal (OLT) for IEEE Stud 802.3ah™ -2004 1000BASE-PX20. The optical transceiver is compliant with the Small Form- Factor Pluggable (SFP) Multi-Source Agreement (MSA).
The transmitter section uses a 1490nm DFB LD with automatic power control (APC) function and temperature compensation circuitry to ensure stable extinction ratio overall operating temperature range. And it is Class I laser compliant 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.

Absolute Maximum Ratings

Parameter

Symbol

Min.

Max.

Units

Notes

Storage Temperature

Tst

-40

+85

°C

-

Operating Case Temperature

Tc

0

70

°C

-

Operating Humidity

RH

5

90

%

Non-condensing

Input Voltage

-

GND

Vcc

V

-

Power Supply Voltage

Vcc-Vee

0

3.6

V

-

Recommended Operating Conditions

Parameter

Symbol

Min

Typical

Max

Unit

Operating Case Temperature

Tc

0

-

+70

°C

Power Supply Voltage

Vcc

3.13

3.3

3.47

V

Power Supply Current

Icc

-

-

400

mA

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

 

2.0

 

Vcc

V

 

Enable

 

0

 

0.8

V

 

TX Fault

Fault

 

2.0

 

Vcc

V

 

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

 

2.0

 

VCC

V

 

LOS_Det Low

 

0

 

0.8

V

 

LOS De-assert Time

LOS_DT

 

 

500

ns

 

LOS Assert Time

LOS_AT

 

 

500

ns

 

Receiver Power DDM (RSSI) Error

RX DDM

 

 

+/-3

dBm

 

Notes:
1. The optical power is launched into SMF.
2. PECL input, internally AC-coupled and terminated.
3. Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-10.
4. Internally DC-coupled.

Diagnostics

Parameter

Range

Unit

Accuracy

Calibration

Temperature

0 to +70

°C

±3°C

Internal/External

Voltage

3.0 to 3.6

V

±3%

Internal/External

Bias Current

0 to 100

mA

±10%

Internal/External

TX Power

2 to 7

dBm

±3dB

Internal/External

RX Power

-28 to -6

dBm

±3dB

Internal/External

Digital Diagnostic Memory Map
The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).
The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.
The digital diagnostic memory map specific data field defines as following.
 Digital Diagnostic Memory Map

PinDefinitions
GEPON transceiver Pin Definitions

Pin Descriptions

Pin

Signal Name

Description

Plug Seq.

Notes

1

VEET

Transmitter Ground

1

 

2

TX FAULT

Transmitter Fault Indication

3

Note1

3

TX DISABLE

Transmitter Disable

3

Note2

4

MOD_DEF(2)

SDA Serial Data Signal

3

Note3

5

MOD_DEF(1)

SCL Serial Clock Signal

3

Note3

6

MOD_DEF(0)

TTLLow

3

Note3

7

NC.

Not connect

3

 

8

LOS

Burst signal detect

3

Note4

9

VEER.

Receiver ground

1

 

10

VEER

Receiver ground

1

 

11

VEER

Receiver ground

1

 

12

RD-

Inv.Received Data Out

3

Note5

13

RD+

Received Data Out

3

Note5

14

VEER

Receiver ground

1

 

15

VCCR

Receiver Power Supply

2

 

16

VCCT

Transmitter Power Supply

2

 

17

VEET

Transmitter Ground

1

 

18

TD+

Transmit Data In

3

Note6

19

TD-

Inv. Transmit Data In

3

Note6

20

VEET

Transmitter Ground

1

 

  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 Disabled
  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.

Recommended Interface Circuit
GEPON
Mechanical Dimensions
GEPON

Ordering information

Part Number

Product Description

SPET-P4311-SE2DA Tx 1490nm, Rx 1310nm, 1.25Gbps/ 1.25Gbps, 1000BASE-PX20, 0º C~+70ºC,DDM

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Web:http://www.sopto.com

 

 

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