XT49U
Vishay Dale
Resistance Welded Holder Type Crystal Unit
FEATURES
• Low cost
• Industry standard
• Excellent aging
RoHS
COMPLIANT
• Wide frequency range
• “AT” cut crystal
The XT49U series is an industry standard AT cut crystal
housed in a HC-49U package. It is our standard resistance
weld type quartz crystal.
• 100 % Lead (Pb)-free and RoHS compliant
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
CONDITION
UNIT
MHz
ppm
ppm
°C
°C
pF
pF
MIN
1.8432
10
10
- 20
- 40
TYPICAL
MAX
125
50
Frequency Range
Frequency Tolerance
Temperature Stability
Operating Temperature Range
Storing Temperature Range
Shunt Capacitance
Load Capacitance
Insulator Resistance
Drive Level
FO
ΔF/FO
TC
TOPR
TSTG
CO
CL
IR
DL
Fa
at 25 °C
ref to 25 °C
30
30
50
+ 70
+ 85
7
Customer Specified
100 VDC
10
500
Series
MΩ
µW
ppm
100
500
+ 5.0
Aging
at 25 °C, per year
- 5.0
EQUIVALENT SERIES RESISTANCE (ESR) AND MODE OF VIBRATION (MODE)
FREQUENCY RANGE (MHz)
1.8432 to 1.999
2.000 to 2.999
MAX ESR (Ω)
MODE
FREQUENCY RANGE (MHz)
MAX ESR (Ω)
MODE
650
500
250
150
100
80
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
Fundamental
6.000 to 7.999
8.000 to 12.999
13.000 to 32.000
24.000 to 29.999
30.000 to 79.999
80.000 to 125.000
50
35
25
60
40
90
Fundamental
Fundamental
Fundamental
3rd Overtone
3rd Overtone
5th Overtone
3.000 to 3.499
3.500 to 3.999
4.000 to 4.999
5.000 to 5.999
DIMENSIONS in inches [millimeters]
0.403
[10.24] Max
0.150
[3.80] Max
0.435
[11.05] Max
0.183
[4.65] Max
0.530
[13.46]
Max
0.500
[12.7] Min
0.192 0.008 [4.88 ± 0.2]
Ø 0.017 ± 0.002 [0.43 + 0.05]
ORDERING INFORMATION
XT49U
MODEL
R
-20
SP
M
e2
OTR
LOAD
OPTIONS
FREQUENCY/MHz JEDEC LEAD (Pb)-FREE
STANDARD
Blank = Standard
R = - 40 °C to + 85 °C
Blank = Series
- 16 = 16 pF
- 20 = 20 pF
- 30 = 30 pF
- 32 = 32 pF
Blank = Standard
SL = Sleeve
SP = Spacer
GLOBAL PART NUMBER
9
U
0
X
T
2
A
N
4
M
A
MODEL
LOAD STABILITY
PACKAGE CODE
OPTIONS
FREQUENCY
www.vishay.com
10
For technical questions contact: frequency@vishay.com
Document Number: 35015
Revision: 18-Oct-07