Document Number: 35012

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

MHz

3.579545

-

66.000

Frequency tolerance

at 25 °C

ppm

- 30

-

+ 30

Temperature stability

ref. to 25 °C

ppm

- 50

-

+ 50

Operating temperature range

°C

- 10

-

+ 70

Storage temperature range

°C

- 55

-

+ 125

Shunt capacitance

pF

-

-

7

Load capacitance

customer specified

pF

10

-

series

Insulation resistance

M

Ω

500

-

-

Drive level

μW

-

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

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.