Alpha Bridge ASFP28-25G-ER Datasheet

Features

  • Compliant with SFP28 MSA and IEEE 33cc25GBASE-ER
  • Up to 78125Gb/s data links
  • 1310nm EML laser and APD photo-detector
  • Operating case temperature: 0 to 70°C
  • 25G electrical interface (25GAUI/OIF CEI-28G-VSR)
  • Reach up to 30km (w/o FEC) or40km (w/ FEC) over 652 SMF
  • Duplex LC Connector
  • Maximum power consumption 5W
  • Advanced firmware allowing customer system encryption information to be stored in transceiver
  • RoHS compliant

Applications

  • High-speed storage area networks
  • Custom high-speed data pipes
  • 25GE Ethernet
  • eCPRI and CPRI

Description

This 1310 nm EML 25Gb/s SFP28 ER transceiver is designed to transmit and receive optical data over single mode optical fiber for link length up to 30km (w/o FEC) or 40km (w/ FEC) over G.652 SMF. The module optical connection is duplex LC and shall be compatible with SFP+ 28Gbps and backward compatible with legacy 10G SFP+ pluggable. The SFP28 ER IT module is a dual directional device with a transmitter and receiver plus a controlmanagement interface (2-wire interface) in the same physical package. 2-wire interface is used for serial ID, digital diagnostics and module control function.

Absolute Maximum Ratings

Parameter Symbol Min. Max. Units Note
Storage Temperature Tc -40 85 °C  
Operating Case Temperature Tc 0 70 °C  
Supply Voltage Vcc 0 3.6 V  
Relative Humidity RH 5 85 %  
Damage Threshold THd -3.0   dBm  

Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Units
Case Operating Temperature Tc 0   70 °C
Power Supply Voltage Vcc 3.135 3.3 3.465 V
Data Rate, each Lane     25.78125   Gb/s
Data Rate Accuracy   -100   100 ppm
Link Distance with G.652 D 0.002   40 km

Digital Diagnostics Functions

Parameter Symbol Accuracy Unit Notes
Temperature monitor absolute error DMI_Temp ± 3 oC Over operating Temp
Supply voltage monitor absolute error DMI_VCC ±0.1 V Full operating range
RX power monitor absolute error DMI_RX ± 2 dB dB 1
Bias Current monitor DMI_Ibias ± 10% mA  
Laser power monitor absolute error DMI_TX ± 2 dB dB 1

Transmitter Electro-optical Characteristics

Parameter Symbol Min. Typ. Max. Units Note
Power Consumption       1.5 W  
Supply Current Icc     450 mA  
Overload Differential Voltage pk-pk TP1a 900     mV  
Common Mode Voltage (Vcm) TP1 -350   2850 mV 1
Differential Termination Resistance Mismatch   TP1       10   %   At 1MHz
Differential Return Loss (SDD11) TP1 See CEI-28G-VSR Equation 13-19 dB  
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC11, SCD11)   TP1 See CEI-28G-VSR Equation 13-20   dB  
  Stressed Input Test   TP1a See CEI-28G- VSR Section 13.3.11.2.1    
Center Wavelength t 1295   1325 nm  
Side Mode Suppression Ratio SMSR 30     dB  
Average Optical Power Pavg -3   6 dBm  
OMA POMA 0   6 dBm 2
Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP)     -1       dBm  
Transmitter Dispersion Penalty TDP     2.7 dB  
Extinction Ratio ER 4     dB  
Relative Intensity Noise RIN20OMA     -130 dB/Hz  
Optical Return Loss Tolerance TOL     20 dB  
Transmitter Reflectance RT     -26 dB  
Average Launch Power OFF Transmitter Poff     -20 dBm  
Eye Mask {X1, X2, X3, Y1, Y2, Y3}   {0.31, 0.4, 0.45, 0.34, 0.38, 0.4}   3

Receiver Electro-optical Characteristics

Parameter Symbol Min. Typ. Max. Units Note
Differential Voltage, pk-pk TP4     900 mV  
Common Mode Voltage (Vcm) TP4 -350   2850 mV 1
Common Mode Noise, RMS TP4     17.5 mV  
Differential Termination Resistance Mismatch TP4     10 % At 1MHz
Differential Return Loss (SDD22) TP4 See CEI-28G-VSR Equation 13-19 dB
Common Mode to Differential conversion and Differential to Common Mode conversion (SDC22, SCD22) TP4 See CEI-28G-VSR Equation 13-21 dB
Common Mode Return Loss (SCC22) TP4   -2 dB 2
Transition Time, 20 to 80% TP4 12   ps  
Vertical Eye Closure (VEC) TP4   5.5 dB  
Eye Width at 10-15 probability (EW15) TP4 0.57   UI  
Eye Height at 10-15 probability (EH15) TP4 228   mV  
Center Wavelength r 1295 1325 nm  
Damage Threshold THd 3   dBm 3
Average Receive Power   -21 -4 dBm 4
Receive Power (OMA)     -4 dBm  
Receiver Sensitivity (OMA) SEN   -19 dBm for BER =5x10-5
Stressed Receiver Sensitivity (OMA)       -16.5 dBm  
Receiver Reflectance RR     -26 dB  
LOS Assert LOSA -30     dBm  
LOS Deassert LOSD     -22 dBm  
LOS Hysteresis LOSH 0.5     dB  
Vertical Eye Closure Penalty, each Lane     2.5   dB  
Stressed Eye J2 Jitter     0.27   UI  
Stressed Eye J4 Jitter     0.39   UI  
SRS Eye Mask Definition            
{X1, X2, X3, Y1, Y2, Y3} {0.31, 0.4,0.45, 0.34, 0.38, 0.4}

Pin Descriptions

PIN Logic Symbol Name / Description Note
1   VeeT Module Transmitter Ground 1
2 LVTTL-O TX_Fault Module Transmitter Fault  
3 LVTTL-I TX_Dis Transmitter Disable; Turns off transmitter laser output  
4 LVTTL-I/O SDA 2-Wire Serial Interface Data Line 2
5 LVTTL-I SCL 2-Wire Serial Interface Clock 2
6   Mod_ABS Module Absent, connected to VeeT or VeeR in the module  
7 LVTTL-I RS0 Receiver Rate Select (not used)  
8 LVTTL-O RX_LOS Receiver Loss of Signal Indication Active LOW  
9 LVTTL-I RS1 Transmitter Rate Select (not used)  
10   VeeR Module Receiver Ground 1
11   VeeR Module Receiver Ground 1
12 CML-O RD- Receiver Inverted Data Output  
13 CML-O RD+ Receiver Data Output  
14   VeeR Module Receiver Ground 1
15   VccR Module Receiver 3.3 V Supply  
16   VccT Module Receiver 3.3 V Supply  
17   VeeT Module Transmitter Ground 1
18 CML-I TD+ Transmitter Non-Inverted Data Input  
19 CML-I TD- Transmitter Inverted Data Input  
20   VeeT Module Transmitter Ground 1

Ordering Information

Model Number Part Number Voltage Temperature
ASFP28-25G-ER OPAX-S40-13-CB 3.3V 0°C to 70°C
ASFP28-25G-ER                      OPAX-S40-13-IB 3.3V -40°C to 85 °C
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