Preliminary

PLL701-05

Low EMI Spread Spectrum Multiplier Clock

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 09/26/02 Page 1

FEATURES

• Spread Spectrum Clock Generator with selectable

multiplier from 1x to 6x outputs.

• Output frequency ranges: 30MHz to 180MHz.

• Modulates external clocks including crystals,

crystal oscillators and ceramic resonators.

• Selectable Center or Down Spread Modulation.

• TTL/CMOS compatible outputs.

• 3.3V Operating Voltage.

• Low short term jitter.

• Available in 8-Pin 150mil SOIC.

DESCRIPTIONS

The PLL701-05 is a Spread Spectrum Clock

Generator designed for the purpose of reducing EMI

in high-speed digital systems. Any output frequency

can be selected by programming 4 multiplier modes.

The device is designed to operate over a very wide

range of input frequencies and provides 1x to 4x

modulated clock outputs.

PIN CONFIGURATION

Note: . v: 120K

Ω Internal Pull down. ^: 120KΩ Internal Pull up.

OUTPUT CLOCK (FOUT) SELECTION

S0

S1

S2

S3

FIN Range

(MHz)

FOUT

Spread Spectrum

modulation

frequency

Spread Spectrum

0

0

0

0

30 - 60

X1

±0.75%

0

0

0

1

30 - 60

X1

±1.00%

0

0

1

0

30 - 60

X1

-2.50%

0

0

1

1

30 - 60

X1

0.5-1.5%

0

1

0

0

30 - 60

X2

±0.25%

0

1

0

1

30 - 60

X2

±0.5%

0

1

1

0

30 - 60

X2

±0.75%

0

1

1

1

30 - 60

X2

±1.00%

1

0

0

0

30 - 60

X2

-2.50%

1

0

0

1

30 - 60

X2

0.5-1.5%

1

0

1

0

30 - 45

X4

0.25-1.25%

1

0

1

1

30 - 45

X4

0.5-1.5%

1

1

0

0

60 - 120

X1

±0.25%

1

1

0

1

60 - 120

X1

±0.50%

1

1

1

0

60 - 120

X1

0.25-1.25%

1

1

1

1

60 - 120

X1

Fin / 512

0.5-1.5%

1

2

3

4

5

6

7

8

FIN

S0^

S1^

VDD

FOUT

GND

FIN = 30 ~ 120 Mhz