18.432MHZ 49USMX/30/50/-40+85/18PF/ATF

Crystal, 49USMX, 18.432 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:18.432MHz; Crystal Case:SMD, 12.4mm x 4.5mm; Frequency Stability + / -:50ppm; Load Capacitance:18pF; Frequency Tolerance + / -:30ppm; Product Range:49USMX Series; Operating Temperature M
SVHC: No SVHC (23-Jan-2024)
No. of Pins: 2Pins
Frequency Nom: 18.432MHz
Product Range: 49USMX
Crystal Mounting: SMD
Load Capacitance: 18pF
Crystal Frequency: 18.432MHz
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	0.299 €
Current stock	1000+
Lead time	30 days

Datasheet

**49USMX CRYSTALS** 

## _EURO_ QUARTZ 

## **49SMD Standard and Low Profile** 

## **3.2MHz to 70.0MHz** 

## **FEATURES** 

**Low cost crystal for mass market applications Surface mount version of HC49-4H crystal Comprehensie stockholding of standard frequencies Customized parts readily available Industry-standard package Low-profile versions available** 

## **OUTLINE & DIMENSIONS** 

## **DESCRIPTION** 

49USMX crystals are low profile surface mount crystals with the same footprint as standard HC49 and HC49-4H crystals. 49USMX crystals are ideal for use in low cost, mass-market applications but are also able to be produced to close tolerances when required. 

## **SPECIFICATION** 

|Frequency Range:<br>Calibration Tolerance:<br>Frequency Stability over Temp:|3.2MHz to 70MHz<br>±30ppm at 25°C standard<br>±10ppm available<br>from ±10ppm over -10° ~ +60°<br>from ±15ppm over -40° ~ +85°C|
|---|---|
|Storage Temperature Range:<br>Shunt Capacitance (C0):<br>Load Capacitance (CL):<br>Ageing:<br>Drive Level:|-50° ~ +105°C<br>4pf typical, 7pF maximum<br>Series or from 8pF to 32pF<br>(Customer specified)<br>±3ppm maximum<br>(Ta = 25°C, drive 100mW)<br>100mW typical, 500mW maximum|
|Reflow Soldering:<br>Holder:|260°C, 10s maximum<br>Hermetic seal, resistance weld|
|Packaging:|EIA 24mm tape and reel|
||1000 pieces per reel|
|RoHS Status:|RoHS Compliant|



## **EQUIVALENT SERIES RESISTANCE** 

|**Frequency**|**Crystal Cut/**|**ESR**|
|---|---|---|
|**Range MHz**|**Mode**|**Ω Max.**|
|3.2 ~ 3.4|AT-Fund.|300|
|3.5 ~ 6.0|AT-Fund.|120|
|6.1 ~ 10.0|AT-Fund.|60|
|10.1~30.0|AT-Fund.|40|
|27.0 ~ 30.0|AT-3rd OT|150|
|30.1 ~ 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 (3.0mm) 49USMXL25 (2.5mm) Calibration tolerance at 25°C (±ppm) Temperature Stability over temp. range (±ppm) Operating Temp. Range (°C) Load Capacitance (Lower andupper=) (Either SR for series or CL in pF) Crystal Mode ATF = AT-cut Fundamental AT3 = AT-cut 3rd Overtone 

**EUROQUARTZ LIMITED  Blacknell Lane  CREWKERNE  Somerset  UK  TA18 7HE Tel: +44 (0)1460 230000  Fax: +44 (0)1460 230001    info@euroquartz.co.uk    www.euroquartz.co.uk**

Updated at April 28, 2026

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