Document Number: 35014 For technical questions, contact: frequency@vishay.com www.vishay.com
Revision: 19-Mar-10 1
Low Profile Holder Type Crystal Units
XT49S
Vishay Dale
This part is a miniature AT cut strip crystal unit with a low
profile package. It is with resistance weld.
FEATURES
•Low cost
• Industry standard
• Wide frequency range
• Excellent aging
• 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 (first year) 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 66.000 80 3rd overtone
6.000 to 9.999 100 fundamental/AT
DIMENSIONS in inches [millimeters]
0.435 [11.05] max.
0.183 [4.65]
max.
0.403 [10.24] max.
0.192 ± 0.008
[4.88 ± 0.2]
0.500 [12.7]
min.
0.150 [3.81] max.
Ø 0.017 ± 0.002
[0.43 ± 0.05]
0.138 [3.5]
max.
www.vishay.com For technical questions, contact: frequency@vishay.com Document Number: 35014
2Revision: 19-Mar-10
XT49S
Vishay Dale Low Profile Holder Type Crystal Units
ORDERING INFORMATION
XT49S R -20 SP 12M e2
MODEL OTR
blank = standard
R = - 40 °C to + 85 °C
LOAD
blank = series
-16 = 16 pF
-20 = 20 pF standard
-30 = 30 pF
-32 = 32 pF
OPTIONS
blank = standard
SP = spacer
SL = sleeve
FREQUENCY/MHz JEDEC LEAD (Pb)-FREE
STANDARD
GLOBAL PART NUMBER
XT9S 20 A NA 12M
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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including but not limited to the warranty expressed therein.
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Material Category Policy
Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the
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(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU.
