October 2003

P2811/12/14

rev

Low Power EMI Reduction IC

2 of 8

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

Pin Configuration

Pin Description

Pin#

Pin Name

Type

Description

1

XIN

I

Connect to externally generated clock signal or crystal.

2

VSS

P

Ground Connection. Connect to system ground.

3

D_C

I

Digital logic input used to select Down (LOW) or Center (HIGH) Spread

Options (see Output Frequency Deviation and Spread Option Selections).

This pin has an internal pull-up resistor.

4

SRS

I

Spread Range Selection. Digital logic input used to select frequency

deviation (see Output Frequency Deviation and Spread Option Selections).

This pin has an internal pull-up resistor.

5

ModOut

O

Spread Spectrum clock output (see Input/Output Frequency Range

Selections and Output Frequency Deviation and Spread Option Selections).

6

FRS

I

Frequency Range Selection. Digital logic input used to select input fre-

quency range (see Input/Output Frequency Range Selections). This pin has

an internal pull-up resistor.

7

VDD

P

Connect to +3.3 V

8

XOUT

I

Connect to crystal. No connect if externally generated clock signal is used.

Input/Output Frequency Range Selections

Part number

Pin 6

P2811 (1X)

P2812 (2X)

P2814 (4X)

FRS

Input

(MHz)

Output

(MHz)

Input

(MHz)

Output

(MHz)

Input

(MHz)

Output

(MHz)

Modulation

rate

0

10-20

10-20

10-20

20-40

10-20

40-80

Input frequency

/ 448

1

20-40

20-40

20-40

40-80

20-40

80-160

Input frequency

/ 896