HHM1591D1

Balun Overview

The TDK HHM1591D1 is a multilayer balun designed for RF signal conditioning within the 350 MHz to 470 MHz frequency range. It operates with a nominal unbalanced port characteristic impedance of 50 Ohms and a balanced port impedance of 100 Ohms. The component features a compact surface-mount package measuring 2.00 mm in length, 1.25 mm in width, and 0.95 mm in thickness. It supports an operating temperature range from -40°C to +85°C.

Balun Feature Summary

• Multilayer LTCC construction for high-frequency signal balancing
• Integrated 50-ohm to 100-ohm impedance transformation
• Compact 0805 (2012 metric) surface-mount footprint

Balun Applications

• RF signal path conditioning in wireless communication modules
• Balanced-to-unbalanced signal conversion in receiver front-ends
• Impedance matching networks for antennas operating in the VHF/UHF bands

Balun Procurement Notes

Verify the specific datasheet revision and manufacturing date code upon order confirmation. Confirm that the final assembly process adheres to the recommended soldering profiles specified by TDK Electronics to ensure joint integrity. Check for any regional distribution restrictions or end-of-life notifications associated with this specific part number before finalizing procurement plans.

Balun Selection Notes

Select this component when a small form factor is required for balancing signals between 50-ohm and 100-ohm lines in the 350-470 MHz band. Ensure the application environment remains within the specified -40°C to +85°C operational temperature limits. Consider the physical dimensions of 2.00 x 1.25 x 0.95 mm for PCB layout constraints.

Balun Part Context

This device belongs to TDK's family of LTCC-based passive components, specifically engineered for radio frequency applications. It utilizes thin-film technology to provide reliable performance in consumer electronics and industrial systems requiring precise signal balancing without the bulk of traditional magnetic components.

Balun Replacement Considerations

Public documentation lists similar multilayer baluns such as the HHM1591A1 and HHM1591A2. These variants share the same functional description but may differ in specific electrical tolerances or packaging configurations. Verify pin compatibility and impedance specifications before substituting.