September 2005

ASM3P2669A

rev 1.6

Low Power Peak EMI Reducing Solution

3 of 11

Notice: The information in this document is subject to change without notice.

Pin Configuration (8-pin SOIC and TSSOP Package)

Pin Description

Pin#

Pin Name

Type

Description

1

CLKIN

I

External reference frequency input.

2

NC

-

No Connect.

3

PD

I

Power-down control pin. Pull low to enable power-down mode. Connect to VDD if not

used.

4

NC

-

No connect.

5

VSS

P

Ground connection.

6

ModOUT

O

Spread spectrum clock output.

7

NC

-

No connect.

8

VDD

P

Power supply for the entire chip

Modulation Profile

Specifications

Description

Specification

For 2.5V Supply

6MHz < CLKIN < 12MHz

Frequency Range

For 3.3V Supply

6MHz < CLKIN < 13MHz

Modulation Equation

Frequency Deviation

±1% @ 10MHz

CLKIN

VSS

ModOUT

NC

NC

1

2

3

4

5

6

7

8

ASM3P2669A

PD

NC

VDD