NNS-4512Bi-120D & NNS-5412Bi-120D

NNS-4512Bi-120D & NNS-5412Bi-120D

SFP 1G, SM, BiDi

Short Description

1.25Gbps SFP BIDI 1490/1550nm (1550/1490nm) 120km Transceiver With DDM Function

Application:

  • Gigabit Ethernet
  • Switch to Switch Interface
  • Gigabit Fiber Channel
  • Switched Backplane Applications
  • Router/Server Interface

Glight SFP transceivers support the 2-wire serial communication protocol as defined in the SFP MSA. The standard SFP serial ID provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information.

Additionally, Glight SFP transceivers provide a unique enhanced digital diagnostic monitoring interface, which allows real-time access to device operating parameters such as transceiver temperature, laser bias current, transmitted optical power, received optical power and transceiver supply voltage. It also defines a sophisticated system of alarm and warning flags, which alerts end-users when particular operating parameters are outside of a factory set normal range.

The SFP MSA defines a 256-byte memory map in EEPROM that is accessible over a 2-wire serial interface at the 8 bit address 1010000X (A0h). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h).

The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through a 2-wire serial interface. When the serial protocol is activated, the serial clock signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks data into the SFP transceiver into those segments of the E2PROM that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def 2) is bi-directional for serial data transfer. The host uses SDA in conjunction with SCL to mark the start and end of serial protocol activation. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially.

Recommended Operating Conditions:  
ParameterSymbolUnitMin.Typ.Max. 
Storage TemperatureTSTG°C-40 85 
Operating Case TemperatureTOP°C0 70 
Power Supply VoltageVCCV3.13.33.5 
Data Rate Gb/s 1.25  
Transmitter Specifications   
ParameterSymbolUnitsMin.Typ.Max.Notes
Average Output Optical Power P0dBm-2 3 
Transmitter Off Optical Power POFFdBm  -45 
Output Center Wavelengthλnm147014901510DFB-LD
   153015501570DFB-LD
Side Mode Suppression RatioSMSRdB30   
Extinction RatioERdB9   
Optical Rise Timeps  260 
Optical Fall Timeps  260 
Jitter P-PTJUI  0.1Note 1
Optical Eye DiagramCompliant with IEEE Std 802.3z 
Note 1: Measured at 1.25Gbps PRBS27-1.   
Electrical Characteristics   
ParameterSymbolUnitsMin.Typ.Max.Notes
Total Supply CurrentICCmA300 
Transmitter
Single Ended Data Input SwingVPPmV2001200 
Differential Input ImpedanceZINohm120100120 
Tx_Fault Output Voltage- HighVOHV2Vcc 
Tx_Fault Output Voltage- LowVOLV00.8 
Tx_Dis Input Voltage- HighVIHV2Vcc 
Tx_Dis Input Voltage- LowVILV00.8 
Receiver
Single Ended Data Output SwingVPPmV300600 
LOS Output Voltage- HighVLOSHV2 
LOS Output Voltage- LowVLOSLV0.8 
Receiver Specifications   
ParameterSymbolUnitsMin.Typ.Max.Notes
SensitivitySendBm  -26Note 1
Saturation Input Optical PowerSatdBm-3   
LOS Assert LevelLOSAdBm-40   
LOS Deassert LevelLOSDdBm  -27 
LOS HysteresisHYSdB0.5 6 



  • Up to 1.25Gbps data rate
  • Duplex LC receptacle optical interface compliant
  • Single +3.3V power supply
  • Digital Diagnostic Monitoring function implemented
  • External calibration
  • Hot-pluggable
  • AC coupling of PECL signals
  • Receiver Loss of Signal Output
  • Transmitter disable input
  • Compliant with SFF-8472
  • Compliant with IEEE802.3z Gigabit Ethernet
  • International Class 1 laser safety certified
  • Operating temperature range: 0oC ~+70oC
  • RoHS Compliance
  •  
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