Mellanox MMA2P00-AS 25GbE SFP28 SR Optical Transceiver

1. Product Overview

The Mellanox MMA2P00-AS is a high-performance, pluggable SFP28 optical transceiver engineered for 25 Gigabit Ethernet applications. Designed to deliver reliable, low-power connectivity over multi-mode fiber (MMF), this module is a critical component for modern data center top-of-rack switching, server connectivity, and storage networks. Operating at a nominal wavelength of 850nm and supporting link distances up to 100 meters on OM4 fiber, it provides a flexible and cost-effective solution for medium-reach interconnects. This transceiver, also known by the alias mq9700 in certain inventory systems, is designed for seamless integration with Mellanox switches and compatible network card adapters, ensuring optimal performance in demanding environments.

2. Key Characteristics

• High-Speed Connectivity: Supports 25.78125 Gbaud signaling rate per channel for 25GbE operation.
• Selectable Retiming: Features configurable Clock and Data Recovery (CDR) for both transmitter and receiver to optimize signal integrity.
• Programmable Signal Conditioning: Includes adjustable transmitter input equalization and receiver output pre-emphasis for superior performance across various fiber conditions.
• Low Power Consumption: Typical power dissipation of only 0.45W without retiming and 0.7W with retiming enabled.
• Extended Reach: Supports up to 100m on OM4 and 70m on OM3 multi-mode fiber at 25Gb/s.
• Multi-Rate Compatibility: Also supports 10GBASE-SR operation at up to 100m on OM3 fiber, providing backward compatibility and investment protection.
• Advanced Diagnostics: Compliant with SFF-8472 for Digital Diagnostic Monitoring (DDM), enabling real-time temperature, voltage, and optical power monitoring.

3. Technology & Standards Compliance

This transceiver is built to the highest industry standards to ensure broad interoperability and reliable performance. It is fully compliant with IEEE 802.3bm for 25GBASE-SR and IEEE 802.3ae for 10GBASE-SR Ethernet. The module adheres to the SFF-8402 specification for the SFP28 form factor and SFF-8472 for management functions. The use of Class 1 laser ensures eye-safe operation. Its design incorporates Mellanox's proprietary integrated circuit technology, which is key to achieving high performance with low power draw, making it an ideal companion for high-density nic card and switch deployments.

4. Working Principle

The MMA2P00-AS functions by converting electrical signals from the host system's SFP28 port into optical signals for transmission over multi-mode fiber. The electrical interface receives high-speed data, which is processed by the module's internal circuitry. The programmable input equalizer conditions the electrical signal before the laser driver modulates a 850nm Vertical-Cavity Surface-Emitting Laser (VCSEL). The optical signal is then transmitted via an LC duplex connector over one fiber. On the receive side, a photodiode converts incoming optical signals back into electrical signals. The programmable output driver then shapes the signal with the appropriate pre-emphasis before sending it to the host. The optional CDR (Clock and Data Recovery) circuitry can be enabled to retime and clean the signal, crucial for maintaining a low Bit Error Rate (BER) in longer or challenging links, ensuring reliable data transmission for your critical network card applications.

5. Application Scenarios

The MMA2P00-AS is versatile and suited for a range of high-speed networking environments:

• Data Center Server-to-Switch Links: Connecting servers equipped with 25GbE nic card adapters to top-of-rack (ToR) or leaf switches.
• Storage Area Networks (SAN): Providing high-bandwidth connectivity for all-flash arrays and storage controllers.
• High-Performance Computing (HPC) Clusters: Establishing low-latency interconnects between compute nodes and fabric switches.
• Network Aggregation: Uplinking access switches to distribution layer switches within a campus or enterprise building.
• Backward-Compatible Upgrades: Deploying in switches that support both 10GbE and 25GbE ports, allowing for flexible migration strategies.

6. Specifications & Selection

Primary Specifications for MMA2P00-AS:

Variant Selection:

7. Advantages & Competitive Selling Points

• Superior Signal Integrity: Selectable retiming and programmable equalization features outperform standard fixed-configuration transceivers, especially in non-ideal fiber plant conditions.
• Power & Thermal Efficiency: Lower typical power dissipation reduces switch power budget consumption and heat output, enabling higher port density.
• Investment Protection & Flexibility: Dual-rate support (25G/10G) allows for seamless network upgrades and provides spare compatibility for existing 10GbE infrastructure.
• Proven Mellanox Quality: Rigorous production testing ensures high reliability and a BER better than 10⁻¹⁵ when used with Mellanox equipment, guaranteeing data integrity for sensitive nic card traffic.
• Comprehensive Management: Full DDM support allows for proactive network monitoring and troubleshooting, reducing operational overhead.

8. Service & Support

This Mellanox LinkX transceiver is covered by a 1-year limited hardware warranty. Our company enhances this with comprehensive support services:

• Rapid Availability: Leverage our extensive multi-million dollar inventory for immediate shipment.
• Technical Expertise: Our seasoned engineering team provides pre- and post-sales consultation to ensure correct deployment and integration with your network card and switch infrastructure.
• Global Logistics: We ensure accurate and timely delivery of your order, including critical components like the mq9700 transceiver.
• 24/7 Customer Service: Round-the-clock support is available for order tracking and initial technical inquiries.

9. Frequently Asked Questions (FAQ)

Q: What is the difference between MMA2P00-AS and MMA2P00-ASHT?
A: The primary difference is the operating temperature range. The standard AS variant supports 0°C to 70°C case temperature. The ASHT (High-Temperature) variant supports an extended range of 0°C to 85°C, making it suitable for more demanding thermal environments.

Q: Can this transceiver be used in a 10GbE SFP+ port?
A: While the SFP28 form factor is electrically compatible with SFP+ ports, functionality depends on the host device. It supports 10GBASE-SR operation, but you must verify compatibility with your specific switch or network card vendor.

Q: Does the 'selectable retiming' feature require configuration?
A: Typically, the retiming (CDR) function is automatically enabled or disabled by the host system based on the link configuration and distance. No manual configuration is usually required for the end-user.

Q: What type of fiber patch cable should I use?
A: Use a duplex LC-to-LC multi-mode fiber patch cable (OM3 or OM4 grade). For 25GbE at 100m, OM4 fiber is required.

10. Precautions & Handling Guidelines

• Electrostatic Discharge (ESD): Always use an ESD wrist strap when handling transceivers. Store and transport in ESD-safe packaging.
• Clean Optical Interfaces: Inspect and clean the LC connector ferrules on both the transceiver and the fiber patch cable before mating to prevent contamination and signal loss.
• Power & Voltage: Ensure the host equipment provides a supply voltage within the specified range of 3.135V to 3.465V.
• Thermal Management: Do not exceed the maximum operating case temperature. Ensure adequate airflow around the switch or adapter card where the module, such as this mq9700 compatible unit, is installed.
• Hot-Plugging: While the module is hot-pluggable, follow the host system's specific guidelines for insertion and removal to avoid electrical issues.
• Compatibility: For guaranteed performance and full feature support, use with Mellanox-branded equipment. Verify compatibility with third-party switches or nic card before deployment.

11. Company Introduction