Aker HC-49 U-Through Hole Quartz Crystal Unit handbook(3) User Guide Manual
Summary
This datasheet provides comprehensive technical specifications for a high-precision Quartz Crystal Unit oscillator component. It details crucial electrical parameters—including frequency tolerance, maximum load capacitance, and operating temperature ranges (-40 to +85°C)—necessary for accurate system timing. Engineered for hardware designers and electronics engineers building embedded systems or reliable industrial timing circuits who require stable performance and adherence to lead-free standards.
Page 1 Text Content
Revisions Ltr Date Appr
Ro HS Compliant Pb - Lead Free
Electrical Specifi cations: Nominal Frequency 20.000 MHz Mode of Oscillation Fundamental Frequency Tolerance at 25°C ±30
PPM Max
Frequency Stability over Temperature Range ±50 Operating Temperature Range (Extended) -40 to +85
Storage Temperature Range -55 to +125 Aging per Year ±3 PPM Max Load Capacitance
Shunt Capacitance (Maximum) Equivalent Series Resistance (ESR) Ohms Max Drive Level 100 Typ - 500 Max u W Solder Reflow Characteristics +260 for 10 s Max º C Mechanical Specifi cations:
Specifi cation Title:
Quartz Crystal Unit HC-49/U-Through Hole
11-3 Chien-Kuo Rd T.E.P.Z. 4027 Taiwan, ROC
Product Specifi cation
All dimensions are millimeters.
Farnell Order Code: 1538724TR
Review: KG
Appr: EG
Part Number: C-20.000-18-3050-X
Page: 1/1 Date: Jan. 18, 2008
www.aker-usa.com
Page Summary Contents For Aker HC-49 U-Through Hole Quartz Crystal Unit handbook(3) User Guide Manual
Manual Details
| Brand | Crystal |
|---|---|
| Pages | 1 |
| File Size | 49.73 KB |
| Published | May 18, 2026 |
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Frequently Asked Questions
What is the nominal frequency of this crystal?
The nominal frequency is 20.000 MHz.
What is the maximum operating temperature range for this unit?
The extended operating temperature range is -40 to +85 degrees C.
What are the characteristics when soldering or assembling the device?
It requires a solder reflow profile of +260 degrees C for 10 seconds.
How does the frequency stability change over time?
The aging rate is specified at approximately ±3 PPM per year.