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THROUGH-HOLE CRYSTALS HC49 SERIES CRYSTALS
DESCRIPTION
HC49 crystals are a long-established industry-standard part. Basic specification HC49 crystals provide the lowest cost crystal available but these crystals can also be manufactured to very close tolerances and low ESR values. Holder variants are HC49/T (truncated), providing a lower height version, 3-wire versions where the crystal base and body can be earthed by a centre earth wire and HC50 which has larger diameter leads specifically for socket mounting.
OUTLINES & DIMENSIONS
FEATURES
* * * * * * Very low cost crystal Available with close tolerances Fully customisable specification Comprehensive Euroquartz stockholding Industry-standard package with options Very wide frequency range
GENERAL SPECIFICATION
Frequency Range: Calibration Tolerance at 25C: Frequency stability over temp: Load Capacitance: Ageing: Drive level: Static capacitance (C0): Holder: Part Numbers for Holder Variants * Holder Type Standard 2 lead: Low height versions: Centre Earth Lead: Centre Earth Lead (Low): `Plug-in' for use in socket: Holder Designation HC49 HC49/T (from 4.0MHz) HC49/3W HC49/T/3W (from 4.0MHz) HC-50 1.0MHz to 250.0MHz from 3ppm to 50ppm from 3ppm to 100ppm 8pF to 50pF, or Series 3ppm max 1st year, 1ppm max per year after 1mW max 7pF max Resistance-weld, hermetic seal
* HC49 crystals are also available for surface-mount applications with formed leads and fitted with a clip. See `49MJ' in the surface-mount crystal section on Euroquartz website; www.euroquartz.co.uk
OSCILLATION MODE & ESR
Frequency (MHz) 1.0 ~ 1.3 2.01 ~ 3.0 3.01 ~ 3.2 3.21 ~ 3.5 3.51 ~ 3.9 3.91 ~ 5.0 5.01 ~ 7.0 7.01 ~ 10.0 10.0 ~ 30.0 30.1 ~ 45 24.0 ~ 100 80.0 ~ 160 110 ~ 250 Crystal Cut/ Oscillation Mode SL Fund. AT Fund. AT Fund. AT Fund. AT Fund AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT 3rd OT AT 5th OT AT 7th OT ESR (max) (Ohms) 5000 400 200 150 120 100 50 35 25 20 40 70 120
FREQUENCY STABILITY OVER TEMPERATURE
Operating Temp. C 0 to +50 -10 to +60 -20 to +70 -30 to +80 -40 to +90 -55 to +105 Temperature Stability (ppm) 3 u u X X X X 5 u u u X X X 7.5 u u u X X X 10 u u u u X X 15 u u u u u X 20 u u u u u u 30 u u u u u u
PART NUMBER GENERATION
HC49 crystal part numbers are derived as follows:
u Indicates this stability is available over the stated operating temp. range Example:
16.000MHz HC49/30/50/10/30pF/ATF
Frequency/Holder/Calibration/Temp. Stability/ Temp. Range/Circuit
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk

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