High reputation Active Optical Cable - 25G SFP28 Active optical cable JHA-SFP28-25G-AOC – JHA
High reputation Active Optical Cable - 25G SFP28 Active optical cable JHA-SFP28-25G-AOC – JHA Detail:
Features
◊ Electrical interface compliant to SFF-8431
◊ 850nm VCSEL laser and PIN photo-detector
◊ Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
◊ Digital diagnostics functions are available via the I2C interface
◊ Operating case temperature Commercial: 0°C to +70 °C
◊ +3.3V single power supply
◊ Power consumption less than 1W
◊ RoHS compliant
◊ Password protection for A0h and A2h
Applications
◊ 25GBASE-SR Ethernet
◊ Servers, switches, storage and host card adapters
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.
Product detail pictures:
Related Product Guide:
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