PRODDUCTS
Shenzhen JHA Technology Co., Ltd is one of the leading manufacturers of hardened Ethernet, PoE, and fiber connectivity products specifically designed for harsh and demanding environments.
PRODUCTS
25G SFP28 Active optical cable JHA-SFP28-25G-AOC
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- Electrical interface compliant to SFF-8431
- 850nm VCSEL laser and PIN photo-detector
- 850nm VCSEL laser and PIN photo-detector
- Digital diagnostics functions are available via the I2C interface
- Digital diagnostics functions are available via the I2C interface
- Digital diagnostics functions are available via the I2C interface
- Power consumption less than 1W
- RoHS compliant
- Password protection for A0h and A2h
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◊ 25GBASE-SR Ethernet
◊ Servers, switches, storage and host card adapters
Classification
Network Cabling
AOC(Active Optical Cable)
- DESCRIPTION
- DIMENSION
- ORDER INFORMATION
- DOWNLOAD
- APPLICATIONS
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Specification
Absolute Maximum Ratings
Table1- Absolute Maximum Ratings
Parameter Symbol Min. Typical Max. Unit Notes Supply Voltage Vcc3 -0.5 - +3.6 V Storage Temperature Ts -10 - +70 °C Operating Humidity RH +5 - +85 % 1 Note: 1 No condensation
Recommended Operating Conditions
Parameter Symbol Min.
Typical Max.
Unit Notes Operating Case Temperature TC 0 - +70
°C Power Supply Voltage Vcc 3.14
3.3 3.47
V Power Supply Current Icc - - 300
mA Power Dissipation Pd - - 1.0
W Bit Rate BR 8.5
25.78125 - Gbps Fiber Bend Radius Rb 3 - - cm Table 2- Recommended operating Conditions
Electrical Characteristics
Table 3- Electrical Characteristics
Parameter Symbol Min. Typ. Max.
Units Notes Transmitter
Differential Data Input Swing Vin,P-P 200 - 1600 mVPP Input Differential Impedance ZIN 90 100 110 Ω Tx_Fault Normal Operation VOL 0 - 0.8 V Transmitter Fault VOH 2.0 - VCC V Tx_Disable Normal Operation VIL 0 - 0.8 V Laser Disable VIH 2.0 - VCC+0.3 V Receiver Differential Date Output Vout 400 - 800
mV Output Differential Impedance ZD 90 100 110
Ω Rx_LOS Normal Operation VOL 0 - 0.8
V Lose Signal VoH 2.0 - VCC
V Optical Characteristics
Table 4-Optical Characteristics
Parameter Symbol Unit
Min Typ Max Notes Optical transmitter Characteristics Bit Rate BR Gbps
8.5 25.78125 - Center Wavelength Range λc nm
820 850 880 Average Launch powerTx_off Poff dBm
- - -45 Launch Optical Power P0 dBm
-6.0 2.4 1 Extinction Ratio ER dB 2 - - Spectral Width(RMS) RMS nm
- - 0.65 Optical Receiver Characteristics Bit Rate BR Gbps
8.5 25.78125 Bit Error Rate BER - - E-12 Damage threshold DT dBm
3.4 - - Overload Input OpticalPower PIN dBm 2.4 -
- 2 Center Wavelength Range λc nm 820 -
880 Receiver Sensitivity inAverage Power Sen dBm - -
-5.2 3 Los Assert LosA dBm -30 -
- Los De-Assert LosD dBm - -
-13 Los Hysteresis LosH dB 0.5 Note:
- Coupled into 50/125 MMF.
- Measured with PRBS 231-1 test pattern @25.78125Gbps.BER=E-12 3. BER=1×10-12; PRBS231-1@25.78125Gbps.
Recommended Host Board Power Supply Circuit
Figure 1, Recommended Host Board Power Supply Circuit
Recommended Interface Circuit
Figure 2, Recommended Interface Circuit
Pin arrangement
Figure 3, Pin View
Table 5-Pin Function
Definitions
Pin Symbol Name/Description Notes 1 VEET Module Transmitter Ground 1 2 TX_FAULT Module Transmitter Fault 2 3 TX_DISABLE Transmitter Disable; Turns off transmitter laser output 3 4 SDA 2-Wire Serial Interface Data Line (MOD-DEF2) 5 SCL 2-Wire Serial Interface Clock (MOD-DEF1) 6 MOD_ABS Module Absent, connected to VEET or VEER in the module 2 7 RS0 Rate Select 0, optionally controls SFP+ module receiver 4 8 RX_LOS Receiver Loss of Signal Indication (In FC designated as Rx_LOS and in Ethernet designated as NOT Signal Detect) 2 9 RS1 Rate Select 1, optionally controls SFP+ module transmitter 4 10 VEER Module Receiver Ground 1 11 VEER Module Receiver Ground 1 12 RD- Receiver Inverted Data Output 13 RD+ Receiver Non-Inverted Data Output 14 VEER Module Receiver Ground 1 15 VCCR Module Receiver 3.3 V Supply 16 VCCT Module Transmitter 3.3 V Supply 17 VEET Module Transmitter Ground 1 18 TD+ Transmitter Non-Inverted Data Input 19 TD- Transmitter Inverted Data Input 20 VEET Module Transmitter Ground 1 Note:
- The module ground pins are isolated from the module case.
- The pins shall be pulled up with 4.7K-10Kohms to a voltage between 3.14V and 3.46V on host board.
- The pin is pulled up to VCCT with a 4.7K-10KΩ resistor in the module.
- See SFF-8472 Rev12.2 Table 10-2.
Monitoring Specification
Figure 4, Memory Map
Mechanical Design Diagram
Table 5- Cable
Length
Cable Length L（Unit: m） Tolerant（Unit: cm） ≤1.0 +5/-0 1.0＜L≤4.5 +15/-0 4.5＜L≤14.5 +30/-0 ＞14.5 +2%/-0 Warnings
Handling Precautions: This device is susceptible to damage as a result of electrostatic discharge (ESD).
A static free environment is highly recommended. Follow guidelines according to proper ESD procedures.
Laser Safety: Radiation emitted by laser devices can be dangerous to human eyes. Avoid eye exposure to direct or indirect radiation.
-
◊ 25GBASE-SR Ethernet
◊ Servers, switches, storage and host card adapters
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