ICS507-01/02

PECL Clock Synthesizer

MDS 507 C

2

Revision 042600

Printed 11/13/00

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

Pin Assignment

Pin Descriptions

Key: I=Input, O=output, TI=tri-level input, P=power supply connection; XI, XO=crystal connections

Clock Multiplier Select Table

16

15

14

13

16 pin narrow (150 mil) SOIC

12

11

10

9

1

2

3

4

5

6

7

8

ICS507-01/02

VDD

GND

X1/ICLK

VDD

S1

PECL

GND

NC

RES

NC

NC

X2

S0

OE

NC

0 = connect pin directly to ground

1 = connect pin directly to VDD

M = leave unconnected (floating)

PECL

S1

S0

Multiplier

0

0

9.72X*

0

M

10X

0

1

12X

M

0

6.25X

MM

8X

M1

5X

10

2X

1M

3X

11

4X

Number

Name

Type

Description

1

X1/ICLK

XI

Crystal or clock connection. Connect to a fundamental parallel mode crystal, or clock.

2

VDD

P

VDD. Connect to +3.3 V or +5 V, and to VDD on pin 3.

3

VDD

P

VDD. Connect to VDD on pin 2. Decouple with pin 5.

4

S1

T I

Multiplier select pin 1. Determines output frequency per table above.

5

GND

P

Connect to ground.

6

GND

P

Connect to ground.

7

NC

-

No connect. Nothing is connected internally to this pin.

8

PECL

O

PECL Output. Connect to resistor load as shown on page one.

9

PECL

O

Complementary PECL Output. Connect to resistor load as shown on page one.

10

RES

I

Bias Resistor Input. Connect a resistor between this pin and VDD.

11

NC

-

No connect. Nothing is connected internally to this pin.

12

NC

-

No connect. Nothing is connected internally to this pin.

13

OE

I

Output Enable. Tri-states both outputs when low. Internal pull-up.

14

S0

T I

Multiplier select pin 0. Determines output frequency per table above.

15

NC

-

No Connect. Nothing is connected internally to this pin.

16

X2

XO

Cr stal connection. Connect to cr stal, or leave unconnected for clock input.

*Use this selection to get

155.52 MHz from a 16 MHz

input.

For lowest phase noise

generation of 155.52 MHz,

use a 19.44 MHz crystal and

the 8X selection.