QSFP28-BX20D-32 – 100G BiDi Transceiver, 20km
Product Overview
The GLOBALfiber QSFP28-BX20D-32 is a high-performance 100GBASE-LR1 BiDi QSFP28 optical transceiver designed for 100 Gigabit Ethernet connectivity over a single strand of Single Mode Fiber (SMF). Utilizing 1330nm TX and 1270nm RX wavelengths, the module enables efficient fiber utilization while reducing infrastructure costs.
Supporting transmission distances up to 20km, the QSFP28-BX20D-32 is ideal for data centers, telecom networks, broadband providers, cloud infrastructure, enterprise backbones, and metro Ethernet applications. The module incorporates advanced PAM4 modulation technology, low power consumption, and integrated Digital Diagnostics Monitoring (DDM) for reliable carrier-grade operation.
Features
• Supports 100GBASE-LR1 BiDi transmission
• Supports 100 Gigabit Ethernet applications
• Data rate up to 106.25Gbps
• PAM4 optical modulation technology
• Up to 20km transmission over Single Mode Fiber (SMF)
• TX wavelength 1330nm
• RX wavelength 1270nm
• EML laser transmitter
• PIN photodiode receiver
• CAUI-4 electrical interface (4 × 25.78Gbps NRZ)
• High-speed I/O electrical interface
• Simplex LC optical connector
• QSFP28 MSA compliant form factor
• Integrated Digital Diagnostics Monitoring (DDM/DOM)
• Single +3.3V power supply
• Hardware TX Disable support
• RX Loss of Signal (RX_LOS) support
• Maximum power consumption 4W
• Hot-pluggable module
• IEEE 802.3cu compliant
• SFF-8636 compliant
• SFF-8679 compliant
• RoHS compliant (EU Directive 2015/863/EU)
Technical Specifications
General Specifications
• Form Factor: QSFP28
• Part Number: QSFP28-BX20D-32
• Data Rate: 106.25Gbps
• Ethernet Standard: 100GBASE-LR1
• Fiber Type: Single Mode Fiber (SMF)
• Connector Type: Simplex LC
• Maximum Reach: 20km
• Optical Modulation: PAM4
• Electrical Interface: CAUI-4
• Supply Voltage: 3.3V
• Operating Temperature: 0°C to +70°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: Up to 85%
• Maximum Power Consumption: 4W
• Maximum Supply Current: 1.21A
• Compliance: IEEE 802.3cu, SFF-8636, SFF-8679
• Environmental Compliance: RoHS (EU 2015/863/EU)
Optical Characteristics
Transmitter
• TX Wavelength: 1331nm (1324.5nm to 1337.5nm)
• Average Launch Power: -0.2dBm to +6.6dBm
• Optical Modulation Amplitude (OMA): +2.8dBm to +6.8dBm
• Launch Power OMA-TDECQ (ER =4.5dB): +1.4dBm minimum
• Launch Power OMA-TDECQ (ER <4.5dB): -0.6dBm minimum
• Maximum TDECQ: 3.4dB
• Laser Off Output Power: = -15dBm
• Side Mode Suppression Ratio (SMSR): = 30dB
• Extinction Ratio: = 3.5dB
• Laser Technology: EML (Electro-Absorption Modulated Laser)
Receiver
• RX Wavelength: 1271nm (1264.5nm to 1277.5nm)
• Receiver Sensitivity (OMA): = -7.6dBm
• Average Receive Power: -10dBm to +6.6dBm
• Receive Power OMA: Up to +6.8dBm
• Receiver Damage Threshold: +7.6dBm
• LOS Assert Threshold: -26dBm to -12dBm
• LOS De-Assert Threshold: -11dBm
• LOS Hysteresis: 0.5dB
• Receiver Technology: PIN Photodiode
Electrical Characteristics
Transmitter Input
• Input Differential Impedance: 100 Ohm
• Differential Input Amplitude: 80mVpp to 900mVpp
• Differential Termination Mismatch: Maximum 10%
• Common Mode Input Voltage: -0.3V to +2.8V
• Rise/Fall Time (20%-80%): 10ps
• LPMode / Reset / ModSelL Low: -0.3V to 0.8V
• LPMode / Reset / ModSelL High: 2.0V to VCC+0.3V
Receiver Output
• Output Differential Impedance: 100 Ohm
• Differential Output Amplitude: Up to 900mVpp
• Differential Termination Mismatch: Maximum 10%
• Rise/Fall Time (20%-80%): 12ps
• ModPrsL and IntL / RX_LOS Output Low: 0V to 0.4V
• ModPrsL and IntL / RX_LOS Output High: VCC-0.5V to VCC+0.3V
Digital Diagnostics Monitoring (DDM)
Monitored Parameters
• Module Temperature
• Supply Voltage
• TX Bias Current
• TX Optical Power
• RX Optical Power
Monitoring Accuracy
• Temperature Accuracy: ±3°C
• Voltage Accuracy: ±0.1V
• TX Bias Current Accuracy: ±10%
• TX Optical Power Accuracy: ±3dBm
• RX Optical Power Accuracy: ±3dBm
Applications
• 100G Ethernet Networks
• Data Center Interconnect (DCI)
• Telecom Transport Networks
• ISP and Broadband Networks
• Metro Ethernet Networks
• Cloud Infrastructure
• Enterprise Core Networks
• Campus Backbone Networks
• Fiber Capacity Expansion Projects