EURO
QUARTZ
Leaded crystal 11.5 x 4.9mm base
Low-cost, industry-standard crystal unit
Available to close tolerances
Frequency range 1.0MHz to 250MHz
A wide choice of package options available
HC49 Crystals
1.0MHz to 250.0MHz
DESCRIPTION
HC49 crystals are long-established, industry-standard crystals.
Standard HC49 crystals provide a very low cost source of system
clock frequency but they are also able to be produced to very close
tolerances where required. Several holder variants are possible.
SPECIFICATION
Frequency Range:
Oscillation Mode:
Calibration Tolerance at 25ºC:
Frequency Stability:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
Drive Level:
Crystal Holder:
Supply format:
1.0MHz to 250MHz
from ±3ppm to ±50ppm
from ±3ppm to ±50ppm
7pF maximum
Series or from 8pF to 32pF
(
)
±3ppm maximum, 1st year,
±1ppm per year thereafter.
100mWatts typ., 500mWatts max.
Resistance-weld hermetic seal
Bulk pack
ESR and OSCILLATION MODE
Frequency
Range 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 ~ 45.0
24.0 ~ 100
80.0 ~ 160
110 ~ 250
Crystal Cut
ESR
Osc. Mode Ohms Max.
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
5000
400
200
150
120
100
50
35
25
20
40
70
120
PART NUMBERING
Part numbers for HC49 crystals are generated as follows:
Example:
8.000MHz HC49 /20/30/-20+70/30pF/R30
Frequency
Package
Calibration Tolerance (±ppm)
Temperature Stability (±ppm)
Operating Temp. Range
(°C, Lower Limit/Upper Limit)
Circuit Condition
(CL in pF or 'SR' for Series)
Max. ESR (Ω) Optional
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
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