Image not available
Illustrative purposes only
14.31818MHZ 49USMX/30/50/-40+85/18PF/ATF
Crystal, 49USMX, 14.31818 MHz, 30 ppm, 50 ppm, 18 pF
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: EUROQUARTZ
- Product type: Crystals
- Frequency Nom:14.31818MHz; Crystal Case:SMD, 12.4mm x 4.5mm; Frequency Stability + / -:50ppm; Load Capacitance:18pF; Frequency Tolerance + / -:30ppm; Product Range:49USMX Series; Operating Temperatu
- SVHC: No SVHC (23-Jan-2024)
- No. of Pins: 2Pins
- Frequency Nom: 14.31818MHz
- Product Range: 49USMX
- Crystal Mounting: SMD
- Load Capacitance: 18pF
- Crystal Frequency: 14.31818MHz
- Crystal Case / Package: SMD, 12.4mm x 4.5mm
- Frequency Stability + / -: 50ppm
- Frequency Tolerance + / -: 30ppm
- Operating Temperature Max: 85°C
- Operating Temperature Min: -40°C
| Delivery and price | |
|---|---|
| Units per pack | 500 |
| Price | 0.287 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
**49USMX CRYSTALS** ## _EURO_ QUARTZ ## **49SMD Standard and Low Profile** - **FEATURES Low cost crystal for mass market applications Surface mount version of HC49-4H crystal** - e e **Comprehensie stockholding of standard frequencies** . **Customized parts readily available** e **Industry-standard package** e **Low-profile versions available** ## **OUTLINE & DIMENSIONS** ## **DESCRIPTION** 49USMX crystals are low profile surface mount crystals that have the same footprint as standard HC49 or HC49-4H crystals. 49USMD crystals are ideal for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. ## **SPECIFICATION** 3.2MHz to 70MHz Frequency Range: Calibration Tolerance: ±30ppm at 25°C standard ±10ppm available Frequency Stability over Temp. AT-Cut: BT-Cut: Operating Temperature Range: Shunt Capacitance (C0): Load Capacitance (CL): AT-Cut: ±30ppm over -10° ~ +60°* BT-Cut: ±100ppm over -10° ~ +60°C* Operating Temperature Range: -10° ~ +60°C to -40° ~ +85°C Shunt Capacitance (C0): 4pf typical, 7pF maximum Load Capacitance (CL): Series or from 8pF to 32pF (Customer specified) Ageing: ±3ppm maximum in first year ±1ppm per year thereafter (Ta = 25°C, drive 100mW) Drive Level: 100mW typical, 500mW maximum Reflow Soldering: 260°C, 10s maximum Holder: Hermetic seal, resistance weld Packaging: EIA 24mm tape and reel 1000 pieces per reel RoHS Status: Compliant ## **EQUIVALENT SERIES RESISTANCE** |**Frequency**|**Crystal Cut/**|**ESR**| |---|---|---| |**Range MHz**|**Mode**|**Ohms Max.**| |3.2~3.4|AT-Fund.|300| |3.5~4.0|AT-Fund.|150| |4.1~4.9|AT-Fund.|120| |5.0~5.9|AT-Fund.|100| |6.0~8.9|AT-Fund.|80| |9.0~9.9|AT-Fund.|60| |10.0~12.9|AT-Fund.|50| |13.0~24.0|AT-Fund.|45| |24.1~30.0|AT-Fund.|40| |24.0~48.0|BT-Fund.|40| |27.0~30.0|AT-3rd OT|150| |30.0~50.0|AT-3rd OT|100| |50.1~70.0|AT-3rd OT|80| ## **PART NUMBER GENERATION** Example: 12.000MHz 49USMX/30/50/-20+70/18pF/ATF Nominal Frequency Package (height variants): 49USMX (4.2mm) 49USMXL (3.2mm) 49USMXL25 (2.5mm) Calibration tolerance at 25°C (±ppm) Temperature Stability over temp. range (±ppm) Operating Temp. Range (°C) _(Lower and upper limits)_ Load Capacitance _(Either SR for series or CL in pF)_ Crystal Mode ATF = AT-cut Fundamental BTF = BT-cut Fundmental AT3 = AT-cut 3rd Overtone **EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: info@euroquartz.co.uk www.euroquartz.co.uk**
Updated at April 28, 2026
About Novapart
Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →Stock Shortage Specialist
When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →Compliant Alternatives
We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →