1000BASE-BX-D SFP BiDi 1550nm-TX/1490nm-RX 120km DOM Simplex LC/UPC SMF Optical Transceiver Module

The 1.25Gbps Bi-Directional SFP Optical Transceiver is designed for ultra-long-distance communication over single-mode fiber (SMF) up to 120 kilometers. Utilizing LC connectors, the module integrates a 1490nm DFB laser with a 1550nm APD receiver or a 1550nm DFB laser with a 1490nm APD receiver, depending on the configuration. It supports a single +3.3V power supply and a data rate of 1.25Gbps, making it ideal for Ethernet, telecom, and Fiber Channel applications. The module is compliant with IEC-60825 laser safety standards and RoHS directives, ensuring safety and environmental responsibility.

This transceiver operates reliably within a temperature range of 0°C to 70°C for commercial applications and -40°C to 85°C for industrial use, with a power dissipation of only 1W. The transmitter offers an average output power of 0 to +5dBm, with an extinction ratio between 9dB and 15dB, while the receiver provides a sensitivity of -32dBm and an overload threshold of -7dBm. Advanced diagnostic features, including Loss of Signal (LOS) detection, enhance performance monitoring and fault management, making the module a dependable solution for long-distance, high-speed optical communication.

These BiDi SFP modules provide cost-effective long-haul connectivity over a single strand of SMF, supporting Ethernet, Fibre Channel, and telecom networks. Operating from a single +3.3 V supply, they offer LVPECL-compatible I/O, low EMI, and high ESD protection. The devices meet IEC-60825 laser safety and RoHS compliance standards.

Absolute Maximum Ratings

Operating Conditions

Optical Characteristics (0 °C to +70 °C, Vcc = 3.3 V)

Transmitter

Receiver

BiDi pair mapping

• CT-SFP-BX-120U: 1490 nm DFB Tx / 1550 nm APD Rx

• CT-SFP-BX-120D: 1550 nm DFB Tx / 1490 nm APD Rx.

Electrical Characteristics (0 °C to +70 °C, Vcc = 3.3 V)

Transmitter I/O

Receiver I/O

EEPROM & Pins (summary)

• EEPROM (A0h): includes SFP identifier, LC connector, 1.25 Gbps nominal BR, LOS/TX_DISABLE/TX_FAULT support, wavelength codes (1490/1550 nm), vendor PN/revision/date fields.

• Pin functions: TX Disable (input with internal pull-up), TX Fault (open collector), LOS (open collector), MOD-DEF[0:2] for 2-wire serial ID. TD± and RD± are AC-coupled differential 100 Ω pairs.

• Gigabit Ethernet long-distance links over single-mode fiber up to 120 km.
• Telecom backhaul and optical transport requiring long-reach BiDi optics.
• Fibre Channel SAN extension over SMF.

• Compact SFP package with LC connector.
• Single-fiber BiDi operation with 1490/1550 nm DFB Tx and APD Rx.
• Supports up to 120 km transmission distance on SMF.
• 3.3 V power supply, LVPECL-compatible data I/O.
• Low EMI, excellent ESD protection.
• IEC-60825 laser safety compliant and RoHS compatible.

At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers, including the CT-SFP-BX-120D, is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.

We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.

At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.

What Does Our Lifetime Warranty Cover?

Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:

• Defects in Materials and Workmanship: If your product experiences any issues related to manufacturing or materials, we’ll repair or replace it free of charge.
• Performance Assurance: Our optical transceivers are rigorously tested to meet industry standards, and we guarantee they’ll perform as expected in your network environment.

Easy Claims Process

Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.

Your Network’s Performance, Guaranteed

Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.