Document Number: 35012 For technical questions contact: frequency@vishay.com www.vishay.com
Revision: 18-Oct-07 13
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
•100 % Lead (Pb)-free and RoHS compliant
DIMENSIONS in inches [millimeters]
STANDARD ELECTRICAL SPECIFICATIONS
PARAMETER SYMBOL CONDITION UNIT MIN TYPICAL MAX
Frequency Range FoMHz 3.200 66.000
Frequency Tolerance ΔF/Fo at 25 °C ppm ±10 ±30 ±50
Temperature Stability TC ref to 25 °C ppm ±10 ±30 ±50
Operating Temperature Range TOPR °C -20 +70
Storage Temperature Range TSTG °C -40 +85
Shunt Capacitance CopF 7
Load Capacitance CL Customer Specified pF 10 Series
Insulator Resistance IR 100 VDC MΩ500
Drive Level DL µW 100 500
Aging Fa at 25 °C, per year ppm -5.0 +5.0
EQUIVALENT SERIES RESISTANCE (ESR) AND MODE OF VIBRATION (MODE)
FREQUENCY RANGE (MHZ) MAX ESR (Ω) MODE FREQUENCY RANGE(MHZ) MAX ESR (Ω)MODE
3.200 to 4.499 150 Fundamental/AT 9.000 to 9.999 60 Fundamental/AT
4.500 to 5.999 120 Fundamental/AT 10.000 to 12.999 50 Fundamental/AT
6.000 to 6.999 100 Fundamental/AT 13.000 to 30.000 40 Fundamental/AT
7.000 to 7.999 90 Fundamental/AT 30.000 to 66.000 80 3rd Overtone
8.000 to 8.999 80 Fundamental/AT
0.150
[3.8] Max
0.403
[10.24] Max CRYSTAL UNIT
0.177
[4.5] Max
0.012 [0.3] Max
0.008
[0.2] Max 0.150 [3.8] Max
0.078
[2.0]
0.354 [9.0]
0.201 ± 0.020 [5.1 ± 0.5]
0.449 ± 0.012 [11.4 ± 0.3]
0.508 ± 0.016 [12.9 ± 0.4]
0.031 ± 0.012
[0.8 ± 0.3]
0.185 ± 0.012
[4.7 ± 0.3]
INSULATION BASE
CRYSTAL LEAD
SOLDER PATTERN
0.236 [6.0]
ORDERING INFORMATION
XT49 M
MODEL
R
OTR
Blank = Standard
R = -40 °C to +85 °C
-20
LOAD
Blank = Series
-20 = 20 pF
-30 = 30 pF
-32 = 32 pF
20 M
FREQUENCY/MHz
e2
JEDEC
LEAD (Pb)-FREE
STANDARD
GLOBAL PART NUMBER
MODEL LOAD
STABILITY
PA C K AG
E
CODE
OPTIONS FREQUENCY
XT9
XX M20ANA20M
RoHS
COMPLIANT
www.vishay.com For technical questions contact: frequency@vishay.com Document Number: 35012
2Revision: 18-Oct-07
XT49M
Vishay Dale Low Profile SMD Type Crystal Units
GLOBAL PART NUMBERING
XT9S 20 A NA 40M
MODEL NUMBER LOAD
CAPACITANCE
PACKAGE
CODE OPTIONS FREQUENCY
XT9U = XT49U
XT9S = XT49S
XT9SL = XT49SL
XT9M = XT49M
XT9ML = XT49ML
XTU1 = XTUM1
18 = 18 pF
20 = 20 pF
NL = Series
to be specified by
customer
TAPE AND REEL
G = RF5
(XT9U, XT9S, XT9SL)
H = RF7
(XT9M, XT9ML)
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
XT26T T A 32K768
MODEL NUMBER
OPERATING
TEMPERATURE
(OTR)
PAC KAGE
CODE FREQUENCY
XT26T = XT26T
XT38T = XT38T
T = - 10 °C to + 60 °C BULK
A = B04
(all models)
32K768 = 32.768 kHz
K is used as decimal place holder
in frequency
Example: XT26T 32.768K
XT57 20 A 40M
MODEL NUMBER LOAD
CAPACITANCE
PAC K AGE
CODE FREQUENCY
XT57 = XT57C
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: XT57C-20 40M
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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Vishay
All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
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otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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