EURO
QUARTZ
SMD form of HC49 Crystals
Low-cost, industry-standard crystal unit formed for SMD
Available with close tolerances
Frequency range 1.0MHz to 200MHz
Specifications fully customisable
DESCRIPTION
49SMD crystals are long-established, industry-standard HC49 crystals
with formed leads and a clip to facilitate surface mounting. The
crystals provide a high quality but very low cost source of system
clock frequency 49SMD crystals may be produced to very close
tolerances.
OUTLINE & DIMENSIONS
49SMD Crystals
1.0MHz to 200.0MHz
SPECIFICATION
Frequency Range:
1.0MHz to 200MHz
Oscillation Mode:
See table
Calibration Tolerance at 25ºC
SL-Cut (<1.3MHz):
from ±50ppm
AT-Cut (>1.3MHz):
from ±3ppm
Frequency Stability over temperature
SL-Cut (<1.3MHz):
from ±100ppm -10° to +60°C
AT-Cut (>1.3MHz):
from ±3ppm 0° to +50°C
(see table)
Shunt Capacitance (C0):
4pF typical, 7pF maximum
Load Capacitance (CL):
Series or from 8pF to 32pF
(Customer
specified CL)
Ageing:
±3ppm maximum, 1st year,
±1ppm per year thereafter.
Drive Level:
100mW typical., 500mW max.
Crystal Holder:
Resistance-weld hermetic seal
Supply format:
Bulk pack or 'Ammo Pak' tape.
STABILITY OVER TEMPERATURE RANGE (AT-CUT CRYSTALS)
Temp.
Range °C
0~+50
-10~+60
-20~+70
-30~+80
-40~+85
-55~+125
Stability ppm
±7.5 ±10 ±15 ±20 ±30 ±50 ±100
ü
ü
X
X
X
X
ü
ü
ü
X
X
X
ü
ü
ü
X
X
X
ü
ü
ü
ü
X
X
ü
ü
ü
ü
ü
X
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
ü
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
(ü=
Available, X = Not available)
PART NUMBER FORMAT
Example:
8.000MHz 49SMD
/10/10/-20+70/32/ 30R
Frequency in MHz
Package
49SMD or 49TSMD
Calibration tolerance
at 25°C (±ppm)
Temperature Stability
over temp. range (±ppm)
Operating Temp. Range (°C)
(Lower and upper limits)
Load Capacitance
(Either SR for series or CL in pF)
Equivalent Series Resistance
(Optional - use when special
value is required)
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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