Document Number: 35012 For technical questions, contact: frequency@vishay.com www.vishay.com
Revision: 19-Mar-10 1
Low Profile SMD Type Crystal Units
XT49M
Vishay Dale
This part is a miniature AT cut strip crystal unit packaged for
surface mounting.
FEATURES
•Low cost
• Industry standard
• Wide frequency range
• Excellent aging
• Surface mount
• Compliant to RoHS directive 2002/95/EC
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER SYMBOL CONDITION UNIT MIN. TYP. MAX.
Frequency range FOMHz 3.579545 - 66.000
Frequency tolerance ΔF/FOat 25 °C ppm - 30 - + 30
Temperature stability TCref. to 25 °C ppm - 50 - + 50
Operating temperature range TOPR °C - 10 - + 70
Storage temperature range TSTG °C - 55 - + 125
Shunt capacitance C0pF - - 7
Load capacitance CLcustomer specified pF 10 - series
Insulation resistance IR100 VDC MΩ500 - -
Drive level DLμW - 100 500
Aging Fa at 25 °C, per year ppm - 5 - + 5
EQUIVALENT SERIES RESISTANCE (ESR) AND MODE OF VIBRATION (MODE)
FREQUENCY RANGE (MHz) MAX. ESR (Ω) MODE FREQUENCY RANGE (MHz) MAX. ESR (Ω)MODE
3.579 to 3.999 200 fundamental/AT 10.000 to 13.999 80 fundamental/AT
4.000 to 4.999 150 fundamental/AT 14.000 to 39.999 50 fundamental/AT
5.000 to 5.999 120 fundamental/AT 40.000 to 66.999 80 3rd overtone
6.000 to 9.999 100 fundamental/AT
DIMENSIONS in inches [millimeters]
0.403 [10.24] max.
0.150 [3.8]
max.
0.150 [3.8] max.
Solder Pattern
0.376 [9.55]
0.219 [5.55]
0.081
[2.05]
Insulation Base
Crystal Lead
0.185 ± 0.012
[4.7 ± 0.3]
0.484 ± 0.024
[12.3 ± 0.6]
0.437 + 0.020/- 0.031
[11.1 + 0.50/- 0.80]
0.201 ± 0.020
[5.1 ± 0.5]
0.031 ± 0.012
[0.8 ± 0.3]
Crystal Unit
0.008 [0.2]
max. 0.177 [4.5]
max.
0.012 [0.3]
max.
www.vishay.com For technical questions, contact: frequency@vishay.com Document Number: 35012
2Revision: 19-Mar-10
XT49M
Vishay Dale Low Profile SMD Type Crystal Units
ORDERING INFORMATION
XT49M R -20 20M e2
MODEL OTR
blank = standard
R = - 40 °C to + 85 °C
LOAD
blank = series
-20 = 20 pF
-30 = 30 pF
-32 = 32 pF
FREQUENCY/MHz JEDEC LEAD (Pb)-FREE
STANDARD
GLOBAL PART NUMBER
XT 9M 2 0 A NA 2 0M
MODEL LOAD PACKAGE
CODE
OPTION FREQUENCY
GLOBAL PART NUMBERING
XT9S 20 A NA 40M
MODEL NUMBER LOAD
CAPACITANCE
PACKAGE
CODE OPTIONS FREQUENCY
XT9S = XT49S
XT9M = XT49M
XTU1 = XTUM1
18 = 18 pF
20 = 20 pF
NL = series
to be specified by
customer
Tape and reel
G = RF5 (XT9S)
H = RF7 (XT9M)
Bulk
A = B04
(all models)
NA = no additional
options
RR = extended
temperature
of - 40 °C to + 85 °C
Contact factory for
all other options
4M = 4 MHz
40M = 40 MHz
100M = 100 MHz
12M288 = 12.288 MHz
M is used as
decimal place
holder in frequency
Example: XT49S-20 40M
XT36 20 A 12M
MODEL NUMBER LOAD CAPACITANCE PACKAGE
CODE FREQUENCY
XT46 = XT46C
XT36 = XT36C
18 = 18 pF
20 = 20 pF
NL = series
to be specified by
customer
Tape and reel
H = RF7
Bulk
A = B04
(all models)
4M = 4 MHz
40M = 40 MHz
100M = 100 MHz
12M288 = 12.288 MHz
M is used as
decimal place
holder in frequency
Example: XT36C-20 12M
Legal Disclaimer Notice
www.vishay.com Vishay
Revision: 12-Mar-12 1Document Number: 91000
Disclaimer
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