component
7U40000E18UCG
Public Made by Adomby adom
SJK(SHENZHEN CRYSTAL TECH) Crystals, SMD3225-4P. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Generated by kicad-footprint-generator · KiCad file format 20260206
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7U40000E18UCG
SJK(SHENZHEN CRYSTAL TECH) · Crystals · SMD3225-4P
7U40000E18UCG from SJK(SHENZHEN CRYSTAL TECH), in a SMD3225-4P. 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 1 (pin 1 pad has the chamfered corner), connected to one side of the 40.000MHz crystal with 18pF load capacitance. |
| 2 | GND | power_in | Marked GND in the top-view crystal connection drawing; lid/ground connection, not a crystal terminal. |
| 3 | XTAL2 | passive | Crystal terminal 2, connected to the other side of the 40.000MHz crystal with 18pF load capacitance. |
| 4 | GND | power_in | Marked GND in the top-view crystal connection drawing; lid/ground connection, not a crystal terminal. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | SJK(SHENZHEN CRYSTAL TECH) |
| Package | SMD3225-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Frequency | 40 | MHz | AT/Fundamental | 2 | |||
| Frequency Tolerance | -10 | 10 | ppm | at 25°C | 2 | ||
| Frequency Stability Over Operating Temperature | -30 | 30 | ppm | -40 °C to +85 °C | 2 | ||
| Shunt Capacitance | C0 | 3 | pF | 2 | |||
| Equivalent Series Resistance | ESR | 40 | Ω | 2 | |||
| Aging | -3 | 3 | ppm/year | @25°C 1st year (Max) | 2 | ||
| Operating Temperature Range | -40 | 85 | °C | 2 | |||
| Storage Temperature Range | -40 | 125 | °C | 2 | |||
| Load Capacitance | CL | 18 | pF | 2 | |||
| Drive Level | 10 | µW | Typical | 2 |
CAD (KiCad official)
- Symbol:
7U40000E18UCG - Footprint:
Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm - 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files:
7u40000e18ucg-etched.step/7u40000e18ucg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);7u40000e18ucg.step/7u40000e18ucg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: SJK(SHENZHEN CRYSTAL TECH) datasheet (4 pp, sha256
74f4acd278f291cd, retrieved 2026-10-27, 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 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(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).