
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
THROUGH-HOLE CRYSTALS
Frequency Range:
1.0MHz to 250.0MHz
Calibration Tolerance at 25C:
from ±3ppm to ±50ppm
Frequency stability over temp:
from ±3ppm to ±100ppm
Load Capacitance:
8pF to 50pF, or Series
Ageing:
±3ppm max 1st year,
±1ppm max per year after
Drive level:
1mW max
Static capacitance (C0):
7pF max
Holder:
Resistance-weld, hermetic seal
Part Numbers for Holder Variants *
Holder Type
Holder Designation
Standard 2 lead:
HC49
Low height versions:
HC49/T (from 4.0MHz)
Centre Earth Lead:
HC49/3W
Centre Earth Lead (Low):
HC49/T/3W (from 4.0MHz)
‘Plug-in’ for use in socket:
HC-50
Very low cost crystal
Available with close tolerances
Fully customisable specification
Comprehensive Euroquartz stockholding
Industry-standard package with options
Very wide frequency range
HC49 SERIES CRYSTALS
* 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
FEATURES
GENERAL SPECIFICATION
DESCRIPTION
HC49 crystals are a long-established industry-standard part. Basic
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
Frequency
(MHz)
Crystal Cut/
Oscillation Mode
ESR (max)
(Ohms)
OSCILLATION MODE & ESR
1.0 ~ 1.3
SL Fund.
5000
2.01 ~ 3.0
AT Fund.
400
3.01 ~ 3.2
AT Fund.
200
3.21 ~ 3.5
AT Fund.
150
3.51 ~ 3.9
AT Fund
120
3.91 ~ 5.0
AT Fund.
100
5.01 ~ 7.0
AT Fund.
50
7.01 ~ 10.0
AT Fund.
35
10.0 ~ 30.0
AT Fund.
25
30.1 ~ 45
AT Fund.
20
24.0 ~ 100
AT 3rd OT
40
80.0 ~ 160
AT 5th OT
70
110 ~ 250
AT 7th OT
120
ü Indicates this stability is available over the stated operating temp. range
PART NUMBER GENERATION
HC49 crystal part numbers are derived as follows:
Example:
16.000MHz HC49/30/50/10/30pF/ATF
Frequency/Holder/Calibration/Temp. Stability/ Temp. Range/Circuit
FREQUENCY STABILITY OVER TEMPERATURE
0° to +50°
ü
-10° to +60°
ü
-20° to +70°
X
ü
-30° to +80°
X
ü
-40° to +90°
X
ü
-55° to +105°
X
ü
Operating
Temp. °C
Temperature Stability (ppm)
±3
±5
±7.5
±10
±15
±20
±30