1000BASE-BX-U SFP BiDi 1490nm-TX/1550nm-RX 180km 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 180 kilometers. It is equipped with a 1490nm DFB laser and a 1550nm APD receiver or a 1550nm DFB laser and a 1490nm APD receiver, depending on the configuration. The transceiver supports a +3.3V single power supply and provides reliable performance for Ethernet, telecom, and Fiber Channel applications. Its SFP package with LC connectors ensures compatibility with various network setups, and it is compliant with laser safety standards (IEC-60825) and RoHS regulations, making it a safe and environmentally responsible choice.

The module operates with low power dissipation, consuming just 1W, and supports a data rate of 1.25Gbps. It offers a transmitter output power of +2dBm to +5dBm and a receiver sensitivity of -32dBm, ensuring robust signal transmission and reception over extended distances. With an operating temperature range of 0°C to +70°C for commercial applications and -40°C to +85°C for industrial use, the transceiver is designed for reliable performance in various environments. Advanced features like Loss of Signal (LOS) detection and digital diagnostics provide enhanced monitoring and fault management capabilities, making it an ideal choice for long-distance, high-speed optical communication.

These hot-pluggable SFP modules operate from a single 3.3 V supply, feature LVPECL data I/O, low EMI with robust ESD protection, and comply with IEC-60825 laser safety and RoHS requirements. Two wavelength options are available: 1490 nm DFB transmitter with 1550 nm APD receiver (-180U), and 1550 nm DFB transmitter with 1490 nm APD receiver (-180D). Rated data rate is 1.25 Gbps for Ethernet/Fibre Channel/Telecom deployments, with link budgets supporting reaches up to 180 km on SMF.

Absolute Maximum Ratings

Operating Conditions

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

Transmitter

Receiver

BiDi pair mapping

• CT-SFP-BX-180U: 1490 nm DFB Tx / 1550 nm APD Rx

• CT-SFP-BX-180D: 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

Digital Interface, Pins & ID

• EEPROM (A0h) fields include SFP identifier, LC connector, 1.25 Gbps nominal BR, options (LOS, TX_DISABLE, TX_FAULT), and wavelength codes for 1490/1550 nm; vendor name/rev fields provided per SFP ID map.

• Key pins: TX Disable (input, internal pull-up), TX Fault (open-collector), LOS (open-collector), MOD-DEF[0:2] for 2-wire serial ID; differential TD±/RD± are AC-coupled 100 Ω. Pull-up guidance and logic-level behavior are specified.

• Gigabit Ethernet backhaul over single-mode fiber spans up to 180 km where only one fiber is available (BiDi).
• Telecom transport links requiring high budget 1.25 Gbps optics with APD receivers.
• Fibre Channel 1G SAN extension over long-haul single-mode networks.

• SFP form factor with LC interface; single-fiber BiDi operation with complementary 1490/1550 nm wavelengths.
• Up to 180 km reach on SMF with DFB transmitter and APD receiver for high sensitivity.
• 3.3 V single-rail power, LVPECL-compatible data I/O, low EMI and strong 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-180U, 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.