TC9-1-75+

Balun Overview

The TC9-1-75+ is a surface-mount RF transformer manufactured by Mini-Circuits, designed for broadband applications. It operates within a frequency range of 0.3 MHz to 475 MHz and provides an impedance transformation ratio of 8:75 ohms. The component is housed in a compact SMD module package, suitable for automated assembly processes. It complies with RoHS standards, ensuring environmental safety. This device is engineered to maintain signal integrity across its specified bandwidth, making it appropriate for systems requiring precise impedance matching between lower impedance sources and 75-ohm transmission lines.

Balun Feature Summary

• Provides balanced-to-unbalanced or impedance conversion functionality with an 8:75 ohm ratio
• Operates as a broadband transformer covering frequencies from 0.3 MHz to 475 MHz
• Utilizes a surface-mount design for efficient PCB integration

Balun Applications

• CATV and broadband access infrastructure
• DOCSIS 3.1 and 4.0 system components
• RF signal conditioning in 75-ohm networks

Balun Procurement Notes

Verify the specific datasheet version when sourcing, as Mini-Circuits may issue Product Change Notifications (PCNs) that alter physical dimensions or electrical characteristics without changing the part number. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as regulatory requirements evolve. Ensure the ordering suffix matches the required packaging format, such as cut tape or reel, to align with production line capabilities. Cross-reference the Mouser part number 139-TC9-1-75 for accurate inventory tracking.

Balun Selection Notes

Select this component when a fixed 8:75 ohm impedance transformation is required within the 0.3 MHz to 475 MHz band. It is suitable for designs prioritizing small form factor due to its surface-mount configuration. Consider thermal management and PCB layout guidelines provided in the official datasheet to optimize performance. Evaluate if the insertion loss and return loss specifications meet the system's signal integrity requirements at the highest operating frequency of 475 MHz.

Balun Part Context

The TC9 series represents Mini-Circuits' portfolio of audio and signal transformers tailored for surface-mount technology. These components are integral to passive device architectures used in cable television and data over cable service interface specification (DOCSIS) systems. The TC9-1-75+ specifically addresses the need for reliable impedance matching in 75-ohm environments, supporting the stability and performance of modern broadband access networks.

Balun Replacement Considerations

No public substitute part numbers are confirmed in the available documentation. Consult Mini-Circuits engineering support for potential equivalents if supply constraints arise.