Document Number: 35012For technical questions contact: frequency@vishay
www.vishay
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
profile中文
•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 F o MHz    3.20066.000Frequency Tolerance ΔF/Fo at 25 °C ppm ±10±30±50Temperature Stability
TC ref to 25 °C
ppm ±10±30
±50Operating Temperature Range T OPR °C -20+70Storage T emperature Range T STG °C -40+85Shunt Capacitance C o pF 7Load Capacitance CL Customer Specified
pF 10Series Insulator Resistance IR 100 V DC M Ω500
Drive Level DL µW 100
500Aging
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
4.499150Fundamental/AT 9.000 to 9.99960Fundamental/AT 4.500 to
5.999120Fundamental/AT 10.000 to 12.99950Fundamental/AT
6.000 to 6.999100Fundamental/AT 13.000 to 30.00040Fundamental/AT
7.000 to 7.99990Fundamental/AT 30.000 to 66.000803rd  Overtone
8.000 to 8.999
80
Fundamental/AT
GLOBAL PART NUMBER
MODEL
LOAD ST ABILITY
PACKAG E CODE
OPTIONS
FREQUENCY
T 9
X
M
2
A N A
2
M
www.vishay For technical questions contact: frequency@vishay
Document Number: 35012
2
Revision: 18-Oct-07
XT49M
Vishay Dale
Low Profile SMD Type Crystal Units
GLOBAL PART NUMBERING
X
T
9
S
2
A N
A
4
M
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
T APE AND REEL
G = RF5
(XT9U, XT9S, XT9SL)H = RF7(XT9M, XT9ML)BULK A = B04(all models)
NA = No Additional Options RR = Extended T emperature 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
X T 26T T
A 32K 768
MODEL NUMBER OPERATING TEMPERATURE
(OTR)PACKAGE 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
X
T
5
7
20A 40M
MODEL NUMBER LOAD
CAPACITANCE PACKAGE CODE FREQUENCY XT57 = XT57C XT46 = XT46C XT36 = XT36C
18 = 18 pF 20 = 20 pF NL = Series to be specified by
customer
T APE AND REEL
H = RF7BULK 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
Revision: 18-Jul-08
1
Disclaimer
Legal Disclaimer Notice
Vishay
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for su
ch applications.
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