component
T49SM12MLDDE2X
Public Made by Adomby adom
Yajingxin Crystals, HC-49S-SMD. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 16d ago |
| viewers | 16d ago |
| package.json | 16d ago |
| page.json | 16d ago |
| README.md | 16d ago |
| t49sm12mldde2x-etched.glb | 16d ago |
| t49sm12mldde2x-etched.step | 16d ago |
| t49sm12mldde2x-hero.glb | 16d ago |
| t49sm12mldde2x-hero.overlay.json | 16d ago |
| t49sm12mldde2x.glb | 16d ago |
| t49sm12mldde2x.kicad_mod | 16d ago |
| t49sm12mldde2x.kicad_sym | 16d ago |
| t49sm12mldde2x.lbr | 16d ago |
| t49sm12mldde2x.step | 16d ago |
T49SM12MLDDE2X
Yajingxin · Crystals · HC-49S-SMD
T49SM12MLDDE2X from Yajingxin, in a HC-49S-SMD. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1 | passive | Terminal 1 of a two-terminal crystal; either orientation. |
| 2 | 2 | passive | Terminal 2 of a two-terminal crystal; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yajingxin |
| Package | HC-49S-SMD |
| Category | Crystals, Oscillators, Resonators |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Frequency Tolerance at 25℃ (調整頻差) | -20 | 20 | ppm | at 25℃ | 2 | ||
| Stability over operation temperature (溫度頻差) | -30 | 30 | ppm | 2 | |||
| Equivalent Resistance (諧振電阻) | 40 | Ω | 2 | ||||
| Shunt Capacitance (Co) (靜態電容) | Co | 0 | 7 | pF | 2 | ||
| Insulation Resistance (絕緣電阻) | 500 | MΩ | at DC 100V | 2 | |||
| Aging (老化率) | 3 | ppm/year | 2 | ||||
| Operating Temperature Range (工作溫度範圍) | -30 | 85 | ℃ | 2 | |||
| Storage Temperature Range (儲存溫度範圍) | -40 | 85 | ℃ | 2 | |||
| Nominal Frequency (標稱頻率) | 12 | MHz | 2 | ||||
| Load Capacitance (CL) (負載電容) | CL | 20 | pF | 2 | |||
| Drive Level (激勵功率) | 100 | uw | 2 |
CAD (KiCad official)
- Symbol:
T49SM12MLDDE2X - Footprint:
Crystal:Crystal_SMD_HC49-SD - 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files:
t49sm12mldde2x-etched.step/t49sm12mldde2x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);t49sm12mldde2x.step/t49sm12mldde2x.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yajingxin datasheet (5 pp, sha256 ``, retrieved 2026-10-14, tier: lcsc)
- Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins, primarycrystal numbering(convention), consensusoff(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).