ABV0252

Low Phase Noise Divider by 2 VCXO (10MHz to 20MHz)

30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 4

7. Crystal Specifications

PARAMETERS

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

Crystal Resonator Frequency

Parallel Fundamental Mode

20

40

MHz

Crystal Loading Rating

At Vcon = 1.65V

9.5

pF

Crystal Pullability

AT cut

250

-

Recommended ESR

AT cut

30

Ω

Note: Crystal Loading rating: 9.5pF is the loading the crystal sees from the VCXO chip at VCON = 1.65V. It is assumed that the crystal will be at nomi-

nal frequency at this load. If the crystal requires more load to be at nominal frequency, the additional load must be added externally.

This however may reduce the pull range.

PACKAGE INFORMATION

C

L

A

8 PIN ( dimensions in mm )

Narrow SOIC

Symbol

Min.

Max.

A

1.47

1.73

A1

0.10

0.25

B

0.33

0.51

C

0.19

0.25

D

4.80

4.95

E

3.80

4.00

H

5.80

6.20

L

0.38

1.27

e

1.27 BSC

E

H

D

A1

e

B

TSSOP

Min.

Max.

-

1.20

0.05

0.15

0.19

0.30

0.09

0.20

2.90

3.10

4.30

4.50

6.20

6.60

0.45

0.75

0.65 BSC