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CJ15-120001210B20

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Changjing Crystals, SMD2520-4P. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

componentcrystals, oscillators, resonatorscj15-120001210b20factory-2.0.0extractor-text
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CJ15-120001210B20

Changjing · Crystals · SMD2520-4P

CJ15-120001210B20 from Changjing, in a SMD2520-4P. 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 XTAL1 passive Crystal terminal (chamfered pad) connected to one side of the 12MHz resonator in the bottom-view schematic; the unit is 12pF load, fundamental mode.
2 NC unconnected Pad shown with no connection to the resonator in the bottom-view drawing; used for mechanical mounting.
3 XTAL2 passive Crystal terminal connected to the other side of the 12MHz resonator in the bottom-view schematic; the unit is 12pF load, fundamental mode.
4 NC unconnected Pad shown with no connection to the resonator in the bottom-view drawing; used for mechanical mounting.

Key specifications

Parameter Value
Manufacturer Changjing
Package SMD2520-4P
Category Crystals, Oscillators, Resonators
Pins 4

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 △f/f -10 10 ppm 2
Frequency Temperature Stability -20 20 ppm 2
Aging △fA -3 3 ppm per Year 2
Resonance Resistance 150 ohms 2
Shunt Capacitance C0 2 pF 2
Drive Level DL 100 μW 2
Operating Temperature Range TOPR -40 85 °C 2
Storage Temperature Range TSTG -55 125 °C 2
Insulation Resistance IR 500 M ohms 2
Nominal Frequency f 12 MHz 2
Load Capacitance CL 12 pF 2

CAD (KiCad official)

  • Symbol: CJ15-120001210B20
  • Footprint: Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm
  • 3D model: SMD2520-4P (KiCad packages3D, STEP)
  • 3D model files: cj15-120001210b20-etched.step / cj15-120001210b20-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cj15-120001210b20.step / cj15-120001210b20.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Changjing datasheet (8 pp, sha256 c4eeee1b4eb210c0, retrieved 2026-10-21, 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).

Datasheet PDF