1000BASE-BX-U SFP BiDi 1310nm-TX/1550nm-RX 3km DOM Simplex LC/UPC SMF Optical Transceiver Module

The 1.25Gbps Bi-Directional SFP Optical Transceiver is a reliable module designed for short-distance communication over single-mode fiber (SMF) up to 3 kilometers. This transceiver features two configurations: a 1310nm FP laser transmitter with a 1550nm PIN photodetector and a 1550nm FP laser transmitter with a 1310nm PIN photodetector. It operates with a single +3.3V power supply and is optimized for Ethernet, telecom, and Fiber Channel applications. Compliant with IEC-60825 laser safety standards and RoHS regulations, the module ensures safe and environmentally responsible use.

The transceiver provides a typical transmitter output power of -12dBm to -6dBm and supports a receiver sensitivity of -24dBm, ensuring robust signal transmission and reception. Advanced features such as Loss of Signal (LOS) detection and LVPECL-compatible data interfaces enhance its diagnostic and operational capabilities. With a compact SFP package and LC connector, the module operates reliably across commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges, making it a dependable choice for high-speed, short-distance optical communication systems.

These compact BiDi SFP modules provide reliable short-distance single-fiber connectivity for Ethernet, Fibre Channel, and telecom networks. They operate from a single +3.3 V supply, feature LVPECL-compatible data interfaces, and include low EMI design with strong ESD protection. The devices are IEC-60825 laser-safety certified and fully RoHS compliant.

Absolute Maximum Ratings

Operating Conditions

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

Transmitter

Receiver

BiDi pair mapping

• CT-SFP-BX-3U: 1310 nm FP Tx / 1550 nm PIN Rx

• CT-SFP-BX-3D: 1550 nm FP Tx / 1310 nm PIN 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 functions, and wavelength codes for 1310/1550 nm operation.

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

• Gigabit Ethernet links over SMF up to 3 km.
• Telecom access networks requiring short-reach BiDi optics.
• Fibre Channel SAN extension in local and campus networks.

• Compact SFP form factor with LC interface.
• Single-fiber BiDi operation with 1310/1550 nm FP lasers and PIN receivers.
• Supports up to 3 km transmission reach on SMF.
• 3.3 V power supply, LVPECL-compatible I/O.
• Low EMI, strong ESD protection.
• IEC-60825 laser safety certified and RoHS compliant.

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-3U, 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.