BALF-CC25-02D3

Overview

The BALF-CC25-02D3 is an ultra-miniature balun manufactured by STMicroelectronics, designed for Bluetooth Low Energy applications. It integrates a matching network and transformer within a monolithic glass substrate using IPD technology. The device provides a 50 ohm nominal input/output impedance with conjugate matching to the CC2541 transceiver. Operating frequency range spans from 2379 MHz to 2507 MHz. It utilizes a FlipChip-4 package with a 0.4mm pitch, ensuring a compact footprint suitable for space-constrained wireless designs.

Feature Summary

• Integrates a matching network and balun function on a single monolithic glass substrate
• Provides conjugate impedance matching specifically optimized for the CC2541 transceiver
• Utilizes IPD technology on a non-conductive glass substrate to optimize RF performance
• Features a compact FlipChip-4 package design for minimal PCB area consumption

Applications

• Bluetooth Low Energy (BLE) transceiver interfaces
• Wireless sensor networks requiring miniaturized RF components
• IoT devices utilizing CC2541-based architectures
• Space-constrained 2.4 GHz communication modules

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as distributors may list variations. Confirm that the component matches the required CC2541 conjugate match specifications for your design. Check availability status directly with authorized STMicroelectronics distributors or partners, as stock levels fluctuate. Ensure the procurement channel is authorized to guarantee component authenticity and traceability.

Selection Notes

Select this component when designing around the CC2541 transceiver and requiring an integrated solution that combines balancing and impedance matching. It is suitable for applications prioritizing small form factor and reduced bill-of-materials complexity. Consider the FlipChip-4 package constraints during PCB layout. This part is appropriate for 2.4 GHz ISM band operations where high RF performance and low insertion loss are critical requirements.

Part Context

This balun belongs to STMicroelectronics' portfolio of passive components built on proprietary IPD technology. It is distinct from other baluns like the BALFHB-WL-02D3, which targets STM32WL sub-GHz microcontrollers. The BALF-CC25-02D3 is specifically engineered for the 2.4 GHz spectrum and complements ST's active semiconductor offerings in the wireless connectivity segment.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should consult STMicroelectronics technical support for potential alternatives if this specific part becomes unavailable.