MK3720

27 MHz and 54 MHz 3.3 Volt VCXO

MDS 3720 D

2

Revision 053100

Printed 11/16/00

Integrated Circuit Systems, Inc. •525 Race Street • San Jose • CA• 95126• (408)295-9800tel • www.icst.com

Pin Descriptions

Pin Assignment

Number

Name

Description

1

X1

Crystal connection. Connect to a pullable 13.5 MHz crystal.

2

VDD

VDD. Connect to +3.3 V.

3

VIN

Voltage input to VCXO. Zero to 3.3 V analog input which controls the frequency of the VCXO.

4

GND

Connect to ground.

5

54M

54 MHz VCXO clock output.

6

13.5M

13.5 MHz VCXO clock output.

7

27M

27 MHz VCXO clock output.

8

X2

Crystal connection. Connect to a pullable 13.5 MHz crystal.

X1

8 pin (150 mil) SOIC

MK3720

1

8

2

3

4

7

6

5

GND

X2

VDD

27M

VIN

54M

13.5M

Pullable Crystal Specifications:

Correlation (load) Capacitance

14 pF

C0/C1

240 max

ESR

35

Ω max

Operating Temperature

0 to 70 °C

Initial Accuracy

±20 ppm

Temperature plus Aging Stability

±50 ppm