MK3713

Low Cost 3.3 Volt VCXO

MDS 3713 B

2

Revision 020900

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

PRELIMINARY INFORMATION

Pin Descriptions

Pin Assignment

Number

Name

Description

1

X1

Crystal connection. Connect to a pullable 10 to 20 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

S0

Select pin for VCXO divider. See table above.

6

VCXOCLK VCXO clock output. Full CMOS output amplitude.

7

S1

Select pin for VCXO divider. See table above.

8

X2

Crystal connection. Connect to a pullable 10 to 20 MHz crystal.

8 pin (150 mil) SOIC

MK3713

1

8

2

3

4

7

6

5

X2

X1

GND

VDD

S0

VIN

S1

VCXOCLK

S1

S0

VCXOCLK (MHz)

0

0

Crystal ÷2

0

1

Crystal ÷4

1

0

Crystal ÷6

1

1

Crystal ÷8

Divider Select Table

Application Tip

For 1.544 MHz (T1), use 12.352 MHz crystal ÷8

For 2.048 MHz (E1), use 12.288 MHz crystal ÷6

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