Features

  Single fiber bi-directional data links asymmetric TX 2488Mbps/RX1244Mbps application

 1490nm continuous-mode DFB laser transmitter and 1310nm burst-mode APD-TIA receiver

 Small Form Factor Pluggable package with SC/UPC Connector

 Reset burst-mode receiver design support more than 15dB dynamic range

Single +3.3V power supply 

Digital diagnostic monitoring interface

Digital burst RSSI function to monitor the input optical power level

LVPECL compatible data input/output interface

LVTTL transmitter disable control

LVTTL transmitter laser fault alarm

LVTTL receiver Signal Detect (SD) indication 

Low EMI and excellent ESD protection

Class I laser safety standard IEC-60825    compliant

Operating case temperature：

Standard:    0℃~+70℃

Industrial: -40℃~+85℃

RoHS 2.0 compliance

Applications

  Gigabit-capable Passive Optical Networks (GPON) B+/C+/C++/D/D1/D2/D3/D4/D5 20Km application

General

The GPON OLT Transceiver module is designed for Gigabit Ethernet Passive Optical Network（GPON）20km transmission. The module incorporates 1490nm continuous-mode transmitter and 1310nm burst-mode receiver. The transmitter section uses a 1490nm DFB laser and an integrated laser driver which is designed to be class-1 eye safe under any single fault. The laser driver includes APC and temperature compensation functions, which are used for keeping the launch optical power and extinction ratio constant over temperature and aging. 

The receiver section uses an integrated APD and BM-preamplifier mounted together. The module has the function that indicates receiver burst-power-detect signal. The receiver includes digitalized burst mode optical power monitoring function, which converses any of a received ONU optical power directly in digital, with a Trigger input from system. When rising edge of Trigger detected, the DDM processor starts a burst optical power conversion, the digital result is available via DDM interface after Burst Optical Power Conversion Time. Trigger pulse width should be more than Burst Optical Power Conversion Holding Time. An integrated WDM coupler can distinguish 1310nm input light from 1490nm output light. The metallic package guarantees excellent EMI and EMC characteristics.

Order Information

Table 1-Order Information

Note:

1. “x”=C : Operating case temperature Standard 0~70℃

“x”=I  : Operating case temperature Industrial -40~85℃

2. Receiver Signal Detected

     “x”=S:RX-SD    (RX-SD=0:signal loss        RX-SD=1:signal valid);

“x”=L:Rx-LOS   (RX-LOS=0:signal valid    RX-LOS=1:signal loss).

3. TX Power & Bias A/W Thresholds
     “x”=1: TX Power A/W Thresholds 1LSB=0.1uW,TX Bias A/W Thresholds 1LSB=2uA
    “x”=2: TX Power A/W Thresholds 1LSB=0.2uW,TX Bias A/W Thresholds 1LSB=4uA

Absolute Maximum Ratings

Table 2-Absolute Maximum Ratings

Operating Environment

Table 3-Operating Environment

*Exceeding any one of these values may destroy the device immediately.

Electrical Characteristics

Table 4-Electrical Characteristics

Note:

1. Internally AC coupled, input termination may be required for LVPECL/CML applications. 

2. Internally DC coupled, LVPECL/CML differential output stage.

3. Refer to the Reset signal rising edge

4. Refer to the Reset signal falling edge.

Specifications

Table 5-Optical Characteristics

Note:

1. BOL, Normal Temperature. 

2. EOL, Over Temperature.

3. Launched into SMF

4. PRBS 2^23-1+72CID @2488Mbs

5. Figure 1

6. PRBS 2^23-1+72CID@1244Mbps BER≤10E-10.

7. Figure 2.

Figure 1  Transmitter Eye Mask Definitions and Test Procedure

Figure 2  Burst Mode Receiver Dynamic Range in GPON System  

Table 6-Digital RSSI Timing Specification

Note:

1. Figure 3.

2. For RSSI Measurement, Figure4.

3. Refer to first bit of the preamble.

4. Figure 4. 

Figure 3  Burst Receiver Timing Sequence

Figure 4  RSSI Timing Sequence

Digital Diagnostic Memory Map

Figure 5  Memory map

Pin arrangement

Figure 6  Pin Views

Table 7-Connector Pin Assignment

Block Diagram

Figure 7  Block Diagram

Typical Application Circuit

Figure 8  Typical Application Circuit

Mechanical Information

Figure 9  Mechanical Information

Regulatory Information

Table 8-List of Regulatory/Compliance

Notice

Gigac reserves the right to make changes to or discontinue any optical link product or service identified in this publication, without notice, in order to improve design and/or performance. Applications that are described herein for any of the optical link products are for illustrative purposes only. Gigac makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

Revision History

Contact

Add: Area 3-502, Haolang technology Park,

NO.2666, Konggang Four Road, Shuangliu district, 610207 Chengdu, China

Tel: (+86) 028-85124518

Fax: (+86) 028-85154518

Postal: 610207

E-mail: sales@gigac.com

Website: http://www.gigac.com

Wavelength Divisio···

Detailed Explanati···

The Working Princi···

The Key Difference···