• Data center & Networking Equipment
• Servers/Storage Devices
• High Performance Computing (HPC)
• Switches/Routers
• Telecom Central Offices (CO)
• Test and Measurement Equipment
Standards Compliance
• SFF8472
• SFP28 MSA
• SFF-8431 and SFF-8432
Features
• 25Gbps serial optical interface
• 850nm VCSEL laser and PIN receiver
• Operating case temperature: (0°C~70°C)
• Maximum link length of 70m via OM3 multimode Fiber (MMF)
• Maximum link length of 100m via OM4 multimode Fiber (MMF)
Product Specification
Absolute Maximum Ratings (TC=25°C, unless otherwise noted)
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings will cause permanent damage and/or adversely affect device reliability.
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Storage Temperature | TS | -40 | - | +85 | ºC |
|
Operating Relative Humidity | RH | 0 | - | +85 | % | No condensation |
General Specifications (Ta, Unless Otherwise Noted)
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Operating Case Temperature | Tc | 0 | - | 70 | ºC |
|
Power Supply Voltage | Vcc | 3.15 | 3.3 | 3.45 | V |
|
Lane Baud Rate | BRLANE |
| 25.78125 |
| Gbps |
|
Electrical Characteristics
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Power Consumption |
|
|
| 1 | W |
|
Supply Current | Icc |
|
| 300 | mA |
|
Transmitter Characteristics (Ta, Unless Otherwise Noted)
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Center wavelength | λ | 840 |
| 860 | nm |
|
RMS spectral width | Pm |
|
| 0.6 | nm |
|
Average optical power | Pavg | -8.4 |
| 2.4 | dBm |
|
Optical modulation amplitude | OMA | -6.4 |
| 3 | dBm |
|
Average launch power of OFF transmitter | Poff |
|
| -30 | dBm |
|
Extinction ratio | ER | 2 |
|
| dB |
|
Optical return loss tolerance |
|
|
| 12 | dB |
|
Receiver Characteristics (Ta, Unless Otherwise Noted)
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Center wavelength | λ | 840 | 850 | 860 | nm |
|
Damage threshold |
| 3.4 |
|
| dBm |
|
Receive power overload |
| 2.4 |
|
| dBm |
|
Receiver reflectance |
|
|
| -12 | dB |
|
Receiver sensitivity | SENS |
|
| -10.3 | dBm | Note1 |
LOS Assert | LOSA | -30 |
|
| dBm |
|
LOS De-Assert | LOSD |
|
| -13 | dBm |
|
LOS Hysteresis | LOSH | 0.5 |
|
| dB |
|
Note 1: Measured with a 25.78125G, PRBS-31 NRZ, ER>2dB, BER<5E-5.
PIN Descriptions
Figure 1 – Pin Definitions
PIN | Logic | Symbol | Name / Description | Notes |
1 |
| VeeT | Module Transmitter Ground |
|
2 | LVTTL-O | TX_Fault | Module Transmitter Fault |
|
3 | LVTTLI | TX_Dis | Transmitter Disable, Turns off transmitter laser output |
|
4 | LVTTL-I/O | SDA | 2-Wire Serial Interface Data Line |
|
5 | LVTTL-I | SCL | 2-Wire Serial Interface Clock |
|
6 |
| MOD_DEFO | Module Definition, Grounded in the module |
|
7 | LVTTL-I | RSO | Receiver Rate Select |
|
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 |
|
11 |
| VeeR | Module Receiver Ground |
|
12 | CML-O | RD- | Receiver Inverted Data Output |
|
13 | CML-O | RD+ | Receiver Data Output |
|
14 |
| VeeR | Module Receiver Ground |
|
PIN | Logic | Symbol | Name / Description | Notes |
15 |
| VccR | Module Receiver 3.3 V Supply |
|
16 |
| VccT | Module Receiver 3.3 V Supply |
|
17 |
| VeeT | Module Transmitter Ground |
|
18 | CML-I | TD+ | Transmitter Non-Inverted Data Input |
|
19 | CML-I | TD- | Transmitter Inverted Data Input |
|
20 |
| VeeT | Module Transmitter Ground |
|
Digital Diagnostic Specification
Parameter | Symbol | Accuracy | Units | Notes |
Transceiver Case Temperature | DMI_TEMP | ±3 | deg.C |
|
Supply voltage monitor absolute error | DMI _VCC | ±3 | % |
|
Channel Bias current monitor | DMI_IBIAS | ±10 | % |
|
Channel RX power monitor absolute error | DMI_RX | ±3 | dB |
|
Channel TX power monitor absolute error | DMI_TX | ±3 | dB |
|
Recommended Interface Circuit
Figure 2 – Typical application circuit
Mechanical Specifications
Unit: mm
Figure 3 - Mechanical Specifications
Product Information
Data Rate | Factor | Optical | Wavelength | Reach |
25G | SFP28 | SR | Dual LC | 850nm | 100m |
ESD Safety Cautions
This transceiver is specified as ESD threshold 1KV for high speed data pins and 2KV for all others electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.
Important Notice
The performance figures, data, and any illustrative material presented in this datasheet are typical and must be explicitly confirmed in writing by ZHAOLONG before they are deemed applicable to any specific order or contract.
By ZHAOLONG's policy of continuous improvement, specifications may change without prior notice. The publication of information in this datasheet does not imply exemption from patent or other
protective rights held by ZHAOLONG or other parties. Additional details can be obtained from any ZHAOLONG sales representative.
Revision Record
Rev. | Comments | Author | Date |
A01 | Initial Release | James Chen | 10/01/2023 |
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