HHM1775D1

Balun Overview

The TDK HHM1775D1 is an LTCC balun transformer designed for RF applications. It operates within a frequency range of 3.1 GHz to 4.9 GHz, covering a bandwidth of 1800 MHz. The device provides impedance transformation between 50 Ohms (unbalanced) and 100 Ohms (balanced). It features a compact 0603 (1608 metric) surface-mount package with dimensions of 1.60mm length, 0.80mm width, and 0.50mm thickness. The component supports an operating temperature range from -40°C to +85°C.

Balun Feature Summary

• Integrates balanced-to-unbalanced signal conversion using Low Temperature Co-fired Ceramic (LTCC) technology.
• Provides precise impedance matching between 50-ohm single-ended lines and 100-ohm differential pairs.
• Designed for high-frequency RF signal integrity in compact mobile form factors.

Balun Applications

• Cellular phone RF front-end circuits
• Wireless LAN modules
• Bluetooth transceivers

Balun Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required packaging options such as cut tape or reel. Confirm that the component status remains active for new designs, as availability may vary by region. Cross-reference the part number with official distributor catalogs to validate RoHS compliance and environmental certifications prior to final procurement decisions.

Balun Selection Notes

Select this component when a 50-ohm to 100-ohm impedance transformation is required within the 3.1 GHz to 4.9 GHz spectrum. Ensure the design accommodates the 0603 footprint constraints. Verify that the insertion loss characteristics meet the system budget. Consider thermal management requirements given the specified operating temperature range of -40°C to +85°C for reliable performance in varied environments.

Balun Part Context

This component belongs to the TDK HHM series of RF baluns. These devices are engineered specifically for wireless communication systems requiring miniaturization. The series utilizes LTCC construction to achieve stable electrical performance and mechanical robustness. This particular model addresses the needs of modern cellular and wireless standards demanding high integration density.

Balun Replacement Considerations

Consult official TDK documentation for qualified substitute part numbers. Do not assume functional equivalence with other manufacturers' components without verifying impedance ratios, frequency ranges, and physical dimensions. Check for any pinout or polarity differences if replacing with similar balun types.

Balun FAQ

What is the impedance ratio of the HHM1775D1?

The device transforms impedance from 50 Ohms on the unbalanced side to 100 Ohms on the balanced side.

Does the HHM1775D1 support frequencies above 4.9 GHz?

No, the specified operational frequency range is limited to 3.1 GHz to 4.9 GHz.