PLL701-11

Low EMI Spread Spectrum Multiplier Clock

47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 01/17/06 Page 1

FEATURES

• Spread Spectrum Clock Generator with selectable

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

• Reference input frequency: 24MHz-120MHz.

• Output frequency range: 24MHz to 240MHz.

• Selectable center spread modulation rate.

• TTL/CMOS compatible outputs.

• 3.3V Operating Voltage.

• Low short term jitter.

• Available in 8-Pin 150mil SOIC package.

DESCRIPTION

The PLL701-11 is a Spread Spectrum Clock

Generator designed for the purpose of reducing EMI

in high-speed digital systems, with the selectable

Center Spread modulation amplitude (see table

below). The output frequency is selected by

programming 4 multiplier modes. 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

±0.75%

0

0

0

1

24 - 60

X1

±1.00%

0

0

1

0

24 - 60

X1

±1.25%

0

0

1

1

24 - 60

X1

±1.50%

0

1

0

0

24 - 60

X2

±0.25%

0

1

0

1

24 - 60

X2

±0.50%

0

1

1

0

24 - 60

X2

±0.75%

0

1

1

1

24 - 60

X2

±1.00%

1

0

0

0

24 - 60

X2

±1.25%

1

0

0

1

24 - 60

X2

±1.50%

1

0

1

0

24 - 60

X4

±0.25%

1

0

1

1

24 - 60

X4

±0.50%

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

±0.75%

1

1

1

1

60 - 120

X1

Fin / 1024

±1.00%

1

2

3

45

6

7

8

FIN

S2^

S1^

VDD

FOUT

GND

FIN = 24 ~ 120 Mhz