ICS307

Serially Programmable Clock Source

MDS 307 D

2

Revision 042501

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

Pin Assignment

Pin Description

Type: XI, XO=crystal connections, I = Input, O = output, P = power supply connection

Number

Name

Type Description

1

X1/ICLK

XI

Crystal connection (REF frequency). Connect to a parallel resonant crystal, or an input clock .

2

NC

-

No Connect.

3

VDD

P

Connect to +3.3V or +5V.

4

NC

-

No Connect.

5

GND

P

Connect to ground.

6

CLK2

O

Output clock 2, determined by F0-F1. Can be reference, ref/2, CLK1/2 or off.

7

NC

-

No Connect.

8

SCLK

I

Serial clock. See timing diagram.

9

STROBE

I

Strobe to load data. See timing diagram.

10

NC

-

No Connect.

11

CLK1

O

Output clock 1, determined by R0-R6, V0-V8, S0-S2 and input frequency.

12

DATA

I

Data Input. Serial input for three words which set the output clock(s).

13

PDTS

I

Powers down entire chip, tri-states CLK1 and CLK2 outputs, when low. Internal pull-up.

14

NC

-

No Connect.

15

NC

-

No Connect.

16

X2

XO Input crystal connection. Connect to a crystal, or leave unconnected for clock input.

1

8

2

3

4

7

6

5

X1/ICLK

X2

VDD

16 pin Narrow

(0.150”) SOIC

DATA

CLK2

CLK1

NC

NC

NC

NC

NC

NC

GND

SCLK

STROBE

PDTS

16

15

14

13

12

11

10

9

ICS307