Product Overview
• Form Factor: SFP28, hot-pluggable
• Application: 25G CWDM Ethernet
• Transmission:
o Data rate: up to 25.78 Gbps
o Tx: CWDM wavelengths 1470–1610 nm (8 channels, EML laser)
o Rx: APD receiver
• Reach: 20 km (SMF, with FEC on host)
• Power Budget: 12 dB (up to 16 dB spec)
• Connector: Duplex LC
• Power Supply: +3.3 V
• Power Consumption: = 1.5 W
• Temperature Range: 0°C to +70°C
• Compliance: RoHS, Class 1 laser (EN 60825, EN 60950 safety)

Key Features
• CWDM 8-channel support (1470–1610 nm)
• Digital Diagnostic Monitoring (DDM)
• Hot-swappable SFP28 footprint
• Designed for 25GBASE-CWDM applications (metro/access networks)
• Warning: Received power must be kept below –5 dBm

Absolute Maximum Ratings
• Supply Voltage: –0.5 to +4 V
• Storage Temp: –40 to +85°C
• Operating Case Temp: 0 to +70°C

Recommended Operating Conditions
• Case Temperature: 0 to +70°C
• Power Supply Voltage: 3.15–3.45 V
• Current: = 450 mA
• Bit Rate: 25 Gbps nominal
• Max Link Length (SMF): 20 km
• Power Budget: 16 dB

Optical Specifications
Transmitter (EML laser, CWDM):
• Wavelength: Center ± 7.5 nm (per ITU grid, 20 nm spacing, 1470–1610 nm)
• Spectral Width (–20 dB): = 0.25 nm
• Output Power: 0 to +5 dBm
• Extinction Ratio: = 4 dB
• Tx Off Power: = –30 dBm
• RIN: = –130 dB/Hz

Receiver (APD):
• Wavelength: 1270–1630 nm
• Sensitivity: = –12 dBm @ BER 5E–5
• Stressed Sensitivity: = –9 dBm
• Overload: = +3 dBm
• LOS De-assert: = –22 dBm
• LOS Assert: = –26 dBm
• LOS Hysteresis: 0.5–4 dB

Electrical Characteristics
• Input/Output Impedance: 100 O differential
• Tx Input Voltage Swing: 250–1200 mV
• Rx Output Voltage Swing: 250–800 mV
• Tx Disable: >2 V (disable), <0.8 V (enable)
• LOS: High = loss of signal

Digital Diagnostics (DDM)
• Temperature: –5 to +75°C thresholds
• Voltage: 3.0–3.6 V thresholds
• Tx Bias: 10–100 mA thresholds
• Tx Power: –7 to +8 dBm thresholds
• Rx Power: –16 to +2 dBm thresholds