PLL701-01/02/04/06

Low EMI Spread Spectrum Multiplier Clock

FEATURES

• Spread Spectrum Clock Generator with selectable

multiplier from 1x to 6x outputs.

• Output frequency ranges: 10MHz to 180MHz.

• Accepts input from crystal or reference clock.

• Selectable Center, Down or Asymmetric Spread

Modulation.

• Selectable Modulation rate.

• TTL/CMOS compatible outputs.

• 3.3V Operating Voltage.

• Low short term jitter.

• Available in 8-Pin 150mil SOIC.

DESCRIPTION

The PLL701-01/02/04/06 are Spread Spectrum Clock

Generators designed for the purpose of reducing EMI

in high-speed digital systems. Any output frequency

from 10 to 180MHz can be selected by programming

6 multiplier modes. The device is designed to operate

from a crystal or reference clock input and provides

1x to 6x modulated clock outputs.

PIN CONFIGURATION

Note:

^: Internal pull-up resistor (120k

Ω for SD, 30 kΩ for

SC0-SC2).

*: The value of SD is latched upon power-up. The

internal pull-up resistor results in a default high value

when no pull-down resistor is connected to this pin

(recommended external pull-down resistor of 27 k

Ω).

OUTPUT CLOCK (FOUT) SELECTION

SST Modulation

SD

SC2

SC1

SC0

FOUT

(-01)

FOUT

(-02)

FOUT

(-04)

FOUT

(-06)

Magnitude

Freq.

Type

1

0

0

0

X1

X2

X4

X6

0.50%

C

±0.25%

1

0

0

1

X1

X2

X4

X6

C

±0.5%

0

0

0

1

X1

X2

X4

X6

1.00%

D

-1.0%

1

0

1

0

X1

X2

X4

X6

C

±0.75%

0

0

1

0

X1

X2

X4

X6

1.50%

A

+0.25% ~ -1.25%

1

0

1

1

X1

X2

X4

X6

C

±1.0%

0

0

1

1

X1

X2

X4

X6

2.00%

A

+0.5% ~ -1.5%

1

1

0

0

X1

X2

X4

X6

C

±1.25%

0

1

0

0

X1

X2

X4

X6

2.50%

A

+0.75% ~ -1.75%

1

1

0

1

X1

X2

X4

X6

C

±1.5%

0

1

0

1

X1

X2

X4

X6

3.00%

A

+1.0% ~ -2.0%

1

1

1

0

X1

X2

X4

X6

C

±1.75%

0

1

1

0

X1

X2

X4

X6

3.50%

A

+1.25% ~ -2.25%

1

1

1

1

X1

X2

X4

X6

OFF

Fin / 512

Notes: C: Center Spread. A: Asymmetric Spread. D: Down Spread.

1

2

3

45

6

7

8

XIN/FIN

XOUT/SD*^

SC0^

SC1^

VDD

FOUT

GND

SC2^

XIN/FIN = 10 ~ 30 MHz