component
HHM1522A7
Public Unreviewedby Ray
TDK Balun, 0805. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownHHM1522A7
TDK · Balun · 0805
HHM1522A7 from TDK, in a 0805. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | UNBAL | passive | Unbalanced (single-ended) 50Ω RF port. Connects to the single-ended side of the balun (typically the antenna or PA/LNA single-ended pin). |
| 2 | GND/DC_FEED | passive | GND or DC feed + RF GND. Serves as the RF ground reference for the unbalanced port and can be used as a DC feed injection point for biasing the connected active device through the balun winding. |
| 3 | BAL+ | passive | Balanced (differential) 50Ω RF port, one of two balanced terminals. Together with pin 4 forms the differential side of the balun, nominally 180° out of phase across 824-894MHz. |
| 4 | BAL- | passive | Balanced (differential) 50Ω RF port, second of two balanced terminals. Paired with pin 3 as the differential output/input of the balun. |
| 5 | GND | passive | Ground reference for the balanced port side of the balun. Connect to the PCB RF ground plane. |
| 6 | NC | unconnected | No internal connection. Leave floating or tie to ground per system layout preference; not electrically connected inside the device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TDK |
| Package | 0805 |
| Category | RF And Wireless |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
HHM1522A7 - Footprint:
Resistor_SMD:R_0805_2012Metric - 3D model: 0805 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TDK datasheet (6 pp, sha256
b16c97c015396800, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).