EURO
QUARTZ
EURO
General specification for HC49 family crystals
Low-cost, industry-standard crystal unit
Available to close tolerances
Frequency range 1.0MHz to 250MHz
Pakcage options
DESCRIPTION
HC49 crystals are long-established, industry-standard crystals.
Standard HC49 crystals provide a very low cost source of system
clock frequency and due to the dimensions of the crystal blank
employed, vthey are also able to be produced to very close
tolerances where required. Supply in several holder variants is
available
SPECIFICATION
Frequency Range:
Oscillation Mode:
Calibration Tolerance at 25ºC:
Frequency Stability:
Shunt Capacitance (C0):
Load Capacitance (CL):
Ageing:
Drive Level:
Crystal Holder:
Supply format:
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
Osc. 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
Ω
Max.
5000
400
200
150
120
100
50
35
25
20
40
70
120
1.0MHz to 250MHz
See table
from ±3ppm to ±50ppm
from ±3ppm to ±50ppm
7pF maximum
Series or from 8pF to 32pF
(
)
±3ppm maximum, 1st year,
±1ppm per year thereafter.
100mW typical, 500mW maximum
Resistance-weld hermetic seal
Bulk pack
HC49 Crystals
PART NUMBERS
Part numbers for HC49 family crystals are generated as follows:
Example:
16.000MHz HC49/30/50/-20+70/30pF/30R
Frequency
Package
HC49, HC49T
HC49/3W, HC49T/3W
HC50
Calibration tolerance
at 25°C (ppm)
Stability over temp. (ppm)
Max ESR (i.e. 30R = 30Ω
max.)
)
(
'ATF' or 'BTF' for AT or
BT-cut fundamental,
3OT for 3rd overtone
Circuit Condition
(SR = Series or 8pF ~ 32pF)
Operating temp. range (°C)
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 sales@euroquartz.co.uk
www.euroquartz.co.uk
Test/Measurement
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