HHM1903A1

Balun Overview

The TDK HHM1903A1 is a Low Temperature Co-fired Ceramic (LTCC) balun designed for signal conditioning applications. It operates within the 2400 MHz to 2500 MHz frequency range, covering the 2.4 GHz ISM band. The component provides impedance transformation between 50 Ohms and 100 Ohms. It utilizes Surface Mount Device (SMD/SMT) termination and is housed in a compact 0402 (1005 metric) package. The device supports board mounting and functions reliably across an operating temperature range of -40°C to +85°C.

Balun Feature Summary

• Utilizes LTCC technology for high-frequency signal balancing
• Provides impedance matching between 50 Ohm and 100 Ohm systems
• Compact surface mount footprint suitable for space-constrained designs

Balun Applications

• Wireless LAN modules
• Bluetooth transceivers
• ISM band communication devices

Balun Procurement Notes

Verify component status as the HHM1903A1 is listed as End-of-Life (EOL). Confirm availability through authorized distributors or secondary markets. Ensure datasheet revisions match design requirements. Validate RoHS compliance documentation prior to integration. Check for obsolescence notifications from TDK Corporation to mitigate supply chain risks.

Balun Selection Notes

Select this component when a 50-to-100 Ohm impedance transformation is required in the 2.4 GHz to 2.5 GHz range. The 0402 package size is optimal for dense PCB layouts. Consider thermal performance within the specified -40°C to +85°C operational window. Evaluate insertion loss specifications against system link budget requirements before finalizing the design.

Balun Part Context

The HHM1903A1 belongs to the TDK HHM series of LTCC baluns. This series focuses on miniaturized signal conditioning components for RF applications. The part integrates passive filtering and balancing functions into a single ceramic structure. It replaces discrete LC networks to reduce component count and improve reliability in wireless modules.

Balun Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. As the component is marked End-of-Life, engineers must identify alternative solutions based on electrical equivalence. Verify that any replacement matches the 0402 footprint and 50/100 Ohm impedance characteristics.