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25GBASE DWDM SFP28 C18 1563.05nm 100GHz 10km DOM LC SMF Module Transceiver

RDSFP28-1825G-LRD
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$460.00
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Rollball 25G DWDM SFP28 C18 1563.05nm 10km Duplex LC DOM Module 


 

Item Specifications

 

Part Number

RDSFP28-1725G-ERD

Brand Name Rollball 
Form type SFP28 Data Rate 25Gb/s
Max Cable Distance:

10km

Wavelength   1563.05nm
Cable Type  SMF Fiber connector LC duplex 
Optical Components  EML/PIN Operate Temperature  0 to 70°C (32 to 158°F) 
TX Power -1~4dBm Receiver Sensitivity <-11dBm
Certificates CE, ROHS,FCC, SGS DOM Support Yes 
Is_customized  Yes  Warranty  3 years 

 

 

Features

Up to 25.78Gb/s data links
DWDM EML transmitter and PIN receiver
100 GHz ITU channel spacing with integrated wavelength locker
Up to 10km on 9/125um SMF
Hot-pluggable SFP28 footprint
Support Digital Diagnostic Monitoring interface
Duplex LC/UPC type pluggable optical interface
RoHS-10 compliant and lead-free
With CDR function
Single +3.3V power supply
Compliant with SFF+MSA and SFF-8472
Metal enclosure, for lower EMI
Meet ESD requirements, resist 8KV direct contact voltage
Case operating temperature
Commercial: 0 ~ +70oC
Extended: -10 ~ +80oC
Industrial: -40 ~ +85oC


Applications:

 

High-speed storage area networks
Computer cluster cross-connect
Custom high-speed data pipes
Inter Rack Connection
Other Optical Links

 

Description:
Rollballs RDSFP28-XX25G-LRD SFP28 transceiver is designed for use in 25-Gigabit Ethernet links up to 10km over single mode fiber. The module consists of DWDM EML Laser, PIN and Preamplifier in a high-integrated optical sub-assembly. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472.This module is designed for single mode fiber and operates at a nominal wavelength of 100GHz ITU Grid, C Band DWDM wavelength.
The module optical connection is duplex LC and shall be compatible with SFP+ 28Gbps and backward compatible with legacy 10G SFP+ pluggable. The SFP28 DWDM LR module is a dual directional device with a transmitter and receiver plus a control management interface (2-wire interface) in the same physical package. 2-wire interface is used for serial ID, digital diagnostics and module control function.
The transmitter converts 25Gbit/s serial PECL or CML electrical data into serial optical data compliant with the 25GBASE-LR standard.  An open collector compatible Transmit Disable (Tx_Dis) is provided.  Logic “1” or no connection on this pin will disable the laser from transmitting.  Logic “0” on this pin provides normal operation.  The transmitter has an internal automatic power control loop (APC) to ensure constant optical power output across supply voltage and temperature variations.  An open collector compatible Transmit Fault (Tx_Fault) is provided. TX_Fault is module output contact that when high, indicates that the module transmitter has detected a fault condition related to laser operation or safety.  The TX_Fault output contact is an open drain/collector and shall be pulled up to the Vcc_Host in the host with a resistor in the range 4.7-10 kΩ.  TX_Disable is a module input contact. When TX_Disable is asserted high or left open, the SFP28 module transmitter output shall be turned off. This contact shall be pulled up to VccT with a 4.7 kΩ to 10 kΩ resistor.
The receiver converts 25Gbit/s serial optical data into serial PECL/CML electrical data.  An open collector compatible Loss of Signal is provided.  Rx_LOS when high indicates an optical signal level below that specified in the relevant standard.  The Rx_LOS contact is an open drain/collector output and shall be pulled up to Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or with an active termination.  Power supply filtering is recommended for both the transmitter and receiver.   The Rx_LOS signal is intended as a preliminary indication to the system in which the SFP28 is installed that the received signal strength is below the specified range. Such an indication typically points to non-installed cables, broken cables, or a disabled, failing or a powered off transmitter at the far end of the cable.

 

 


Wavelength Selection: C-band λc Wavelength Guide Pin Descriptions
 
Channel Wavelength (nm) Frequency (THZ) Channel Wavelength (nm) Frequency (THZ)
C17 1563.86 191.70 C39 1546.12 193.90
C18 1563.05 191.80 C40 1545.32 194.00
C19 1562.23 191.90 C41 1544.53 194.10
C20 1561.42 192.00 C42 1543.73 194.20
C21 1560.61 192.10 C43 1542.94 194.30
C22 1559.79 192.20 C44 1542.14 194.40
C23 1558.98 192.30 C45 1541.35 194.50
C24 1558.17 192.40 C46 1540.56 194.60
C25 1557.36 192.50 C47 1539.77 194.70
C26 1556.55 192.60 C48 1538.98 194.80
C27 1555.75 192.70 C49 1538.19 194.90
C28 1554.94 192.80 C50 1537.40 195.00
C29 1554.13 192.90 C51 1536.61 195.10
C30 1553.33 193.00 C52 1535.82 195.20
C31 1552.52 193.10

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