CWDM transceiver SFP 2.67Gbps 120km Reach

Description

Maximize your network’s performance and reach with our industrial-grade CWDM transceiver SFP, engineered to deliver reliable 120km transmission at 2.67Gbps data rates.Its robust construction featuring 8 CWDM DFB wavelengths laser and an APD photodetector for superior sensitivity and long-distance performance. Fully compliant with SFP MSA and SFF-8472 standards, it offers seamless compatibility with a wide range of networking equipment. The integrated Digital Diagnostic Monitoring (DDM) function provides real-time oversight of temperature, voltage, and optical power through an I2C interface, enabling predictive maintenance and network optimization. Designed with a +3.3V single power supply and RoHS compliance, this CWDM transceiver supports critical applications including SDH STM-16, SONET OC-48 systems, 2X Fibre Channel, and core switch-to-switch interfaces.

CWDM transceiver SFP Features

Long-Distance Optical Performance

Supports transmission distances up to 120 kilometers over single-mode fiber (SMF), making it perfect for metropolitan area network (MAN) applications and connecting dispersed data centers.

Utilizes a high-quality, uncooled CWDM DFB laser transmitter and an Avalanche Photodiode (APD) receiver to ensure excellent signal clarity and reception sensitivity over the entire link.

Advanced Digital Diagnostics & Monitoring

Implements full SFF-8472 compliant Digital Diagnostic Monitoring (DDM) with internal calibration.

Provides real-time, accessible monitoring of key parameters: Transmitted Optical Power, Received Optical Power, Laser Bias Current, Supply Voltage, and Module Temperature.

This feature enables proactive network management, helps in troubleshooting, and prevents unexpected downtime.

Broad Compatibility & Standards Compliance

Hot-pluggable SFP form factor with a duplex LC receptacle for easy installation and upgrades.

Fully compliant with SFP Multi-Source Agreement (MSA) standards, ensuring interoperability with a vast array of switches, routers, and media converters from major vendors.

Designed to meet Class I laser safety requirements and is RoHS compliant, adhering to international safety and environmental regulations.

Reliable Operation & Design

Operates on a single +3.3V power supply, simplifying host board design.

Features a standard industrial operating case temperature range of 0°C to +70°C, ensuring stable performance in typical equipment environments.

Includes essential host interfaces such as TX Disable, TX Fault, and Loss of Signal (LOS) indicators for comprehensive link management.

CWDM transceiver 

Module Block Diagram

Absolute Maximum Ratings

Table 1 – Absolute Maximum Ratings

 Recommended Operating Conditions

Table 2 – Recommended Operating Conditions

BD-XX48-08CD

See table3 below for “xx” values

Table3 -λC Wavelength Guide

Optical and Electrical Characteristics

BD-XX48-08CD: (CWDM and APD, 120km Reach)

Table 4 – Optical and Electrical Characteristics

Notes:

1. The optical power is launched into SMF.

2. PECL input, internally AC-coupled and terminated.

3. Measured with a PRBS 2²³-1 test pattern @2488Mbps, BER ≤1×10^-12.

4. Internally AC-coupled.

 Timing and Electrical

Table 5 – Timing and Electrical

CWDM transceiver SFP Diagnostics

Table 5 – Diagnostics Specification

 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.

Pin Definitions

Pin Diagram

Pin Descriptions

CWDM transceiver 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 is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.

5) RD-/+: These are the differential receiver outputs. They are internally AC-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 mod

Recommended Interface Circuit

Mechanical Dimensions

Regulatory Compliance

BAUDCOM SFP transceiver is designed to be Class I Laser safety compliant and is certified per the following standards