Document Number: 35012

For technical questions contact: frequency@vishay.com

www.vishay.com

Revision: 14-Aug-03

1

Low Profile SMD Type Crystal Units

XT49M

Vishay Dale

FEATURES

• Low cost

• Industry standard

• Wide frequency range

• Excellent aging

• Surface mount

STANDARD ELECTRICAL SPECIFICATIONS

PARAMETER

SYMBOL

CONDITION

UNIT

MIN

TYPICAL

MAX

Frequency Range

MHz

3.200

66.000

Frequency Tolerance

∆F/Fo

at 25ºC

ppm

± 10

± 30

± 50

Temperature Stability

TC

ref to 25ºC

ppm

± 10

± 30

± 50

Operating Temperature Range

°C

- 20*

+ 70*

Storage Temperature Range

°C

- 40

+ 85

Shunt Capacitance

pF

7

Load Capacitance

CL

Customer Specified

pF

10

Series

Insulator Resistance

IR

MΩ

500

Drive Level

DL

µW

100

500

Aging

Fa

at 25ºC, per year

ppm

- 5.0

+ 5.0

DIMENSIONS in inches [millimeters]

EQUIVALENT SERIES RESISTANCE (ESR) AND MODE OF VIBRATION (MODE)

FREQUENCY RANGE(MHZ)

MAX ESR(Ω

Ω

Ω

Ω)

MODE

FREQUENCY RANGE(MHZ)

MAX ESR(Ω

Ω

Ω

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

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]

0.236 [6.0]

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

ORDERING INFORMATION

XT49M

MODEL

R

OTR

Blank = Standard

R = - 40°C to +85°C

- 20

LOAD

Blank = Series

- 20 = 20pF

- 30 = 30pF

- 32 = 32pF

20M

FREQUENCY/MHz

This part is a miniature AT cut strip crystal unit packaged for

surface mounting.