component

ECS-250-18-4X-CKM

Public Made by Adom

by adom

ECS Crystals, HC-49S. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.

componentcrystal oscillator-oscillator-resonatorecs-250-18-4x-ckmfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers ecs-250-18-4x-ckm: symbol repaired (crystal) · Ray
ecs-250-18-4x-ckm-etched.glb Publish 0.1.0 · Ray
ecs-250-18-4x-ckm-etched.step ecs-250-18-4x-ckm: factory component page (tier=lcsc) · Ray
ecs-250-18-4x-ckm-hero.glb ecs-250-18-4x-ckm: hero GLB from the etched model (keeps the MPN mark) · Ray
ecs-250-18-4x-ckm-hero.overlay.json Publish 0.1.0 · Ray
ecs-250-18-4x-ckm.glb Publish 0.1.0 · Ray
ecs-250-18-4x-ckm.kicad_mod Publish 0.1.0 · Ray
ecs-250-18-4x-ckm.kicad_sym ecs-250-18-4x-ckm: symbol repaired (crystal) · Ray
ecs-250-18-4x-ckm.lbr ecs-250-18-4x-ckm: symbol repaired (crystal) · Ray
ecs-250-18-4x-ckm.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json Set visibility: public · Ray
README.md Publish 0.1.0 · Ray

ECS-250-18-4X-CKM

ECS · Crystals · HC-49S

ECS-250-18-4X-CKM from ECS, in a HC-49S. 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 ECS
Package HC-49S
Category Crystal Oscillator/Oscillator/Resonator
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 -10 10 ppm @ +25°C, option C 1
Frequency Stability -10 10 ppm -20 ~ +70°C, option K 1
Operating Temperature Topr -20 70 °C option M 1
Storage Temperature Tstg -55 125 °C 1
Drive Level DL 500 μW 1
Shunt Capacitance Co 7 pF 1
Equivalent Series Resistance ESR 30 Ω 20.000 ~ 30.000 MHz, Fundamental 1
Aging (First Year) -5 5 ppm @ +25°C ±3°C 1
Frequency Fo 25 MHz 250 = 25.000 MHz 1
Load Capacitance 18 pF 18 = 18 pF specified in P/N 1
Peak Solder Temperature 260 °C 10 sec max, 2 cycles max 2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin MSL 1, Lead Finish Sn/Cu Matte HC-49USX 2

CAD (KiCad official)

  • Symbol: ECS-250-18-4X-CKM
  • Footprint: Crystal:Crystal_HC49-4H_Vertical
  • 3D model: HC-49S (KiCad packages3D, STEP)
  • 3D model files: ecs-250-18-4x-ckm-etched.step / ecs-250-18-4x-ckm-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ecs-250-18-4x-ckm.step / ecs-250-18-4x-ckm.glb are the bare package body.

Provenance

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

  • Datasheet: ECS datasheet (2 pp, sha256 ``, retrieved 2026-10-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary crystal numbering (convention), consensus off (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).

Datasheet PDF