PLL701-13

Low EMI Spread Spectrum Multiplier Clock

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991

www.phaselink.com

Rev 08/12/04 Page

1

FEATURES

• Spread Spectrum Clock Generator with selectable

multiplier ( 1x, 2x and 4x ).

• Output frequency ranges: 24MHz to 240MHz.

• Selectable Down Spread Modulation.

• TTL/CMOS compatible outputs.

• 3.3V Operating Voltage.

• Low short-term jitter.

• Available in 8-Pin 150mil SOIC.

DESCRIPTION

The PLL701-13 is a Spread Spectrum Clock

Generator designed for the purpose of reducing EMI

in high-speed digital systems. The selectable Down

Spread modulation magnitude (see table below)

permits EMI reduction without over-clocking the

output. The device operates over a very wide range of

input frequencies and provides 1x to 4x modulated

clock outputs.

PIN CONFIGURATION

Note: v: 30k

Ω Internal Pull down ^: 30kΩ Internal Pull up.

OUTPUT CLOCK (FOUT) SELECTION

Spread Spectrum Modulation

S3

S2

S1

S0

FIN Range

(MHz)

FOUT

Frequency

Magnitude

0

0

0

0

24 - 60

X1

-1.5%

0

0

0

1

24 - 60

X1

-2.0%

0

0

1

0

24 - 60

X1

-2.5%

0

0

1

1

24 - 60

X1

-3.0%

0

1

0

0

24 - 60

X2

-0.5%

0

1

0

1

24 - 60

X2

-1.0%

0

1

1

0

24 - 60

X2

-1.5%

0

1

1

1

24 - 60

X2

-2.0%

1

0

0

0

24 - 60

X2

-2.5%

1

0

0

1

24 - 60

X2

-3.0%

1

0

1

0

24 - 60

X4

-0.5%

1

0

1

1

24 - 60

X4

-1.0%

1

1

0

0

60 - 120

X1

-0.5%

1

1

0

1

60 - 120

X1

-1.0%

1

1

1

0

60 - 120

X1

-1.5%

1

1

1

1

60 - 120

X1

Fin / 1024

-2.0%

1

2

3

45

6

7

8

FIN

S2^

S1^

VDD

FOUT

GND

FIN = 24 ~ 120 Mhz