SFP‐PX20 GEPON OLT SFP Transceiver 1.25Gbps,1000BASE-PX20

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. Symetric datatransfer with 1,25Gbps speed upstream and 1,25Gbps downstream for up to 20km distance.

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

Recommended Operating Conditions

Transmitter Optical and Electrical Characteristics 

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