Low EMI Clock Generator

MDS 1707 G

2

Revision 032204

Integrated Circuit Systems, Inc.

MK1707

Pin Assignment

Spread Direction and Percentage

Select Table

0 = connect to GND

M = unconnected (floating)

1 = connect directly to VDD

Pin Descriptions

ICLK

VDD

GND

S1

CLK

S0

LEE

SD

1

2

3

4

8

7

6

5

8 pin (150 mil) SOIC

SD

Pin 8

S1

Pin 7

S0

Pin 6

Spread

Direction

Spread

Percentage (%)

00

0Down

0.6

00

MDown

0.8

00

1Down

1.25

0M

0

Down Center

+0.5, -1.5

0M

MDown

2

0M

1

Down Center

+0.5, -2.5

01

0

Down Center

+0.5, -3

01

MDown

5

01

1

Power Down

-

10

0

Center

±0.35

10

M

Center

±0.5

10

1

Center

±0.7

1M

0

Center

±0.8

1M

M

Center

±1.1

1M

1

Center

±1.4

11

0

Test

Test

11

M

Center

±2.5

11

1

Power Down

-

Pin

Number

Pin

Name

Pin Type

Pin Description

1

ICLK

Input

Connect to graphics input clock.

2

VDD

Power

Connect to +3.3 V.

3

GND

Power

Connect to ground.

4

CLK

Output

Spread spectrum clock output per table above.

5

LEE

Input

Low EMI enable. Turns on spread spectrum when high. Internal pull-up resistor.

6

S0

Input

Function select 0 input. Selects spread amount and direction per table above.

Internal mid-level.

7

S1

Input

Function select 1input. Selects spread amount and direction per table above.

Internal mid-level.

8

SD

Input

Spread direction select input. Selects the direction of spread per table above.

Internal pull-up resistor.