PLL701-05 Datasheet, PDF (1/5 Pages) PhaseLink Corporation – Low EMI Spread Spectrum Multiplier Clock

Preliminary PLL701-05
Low EMI Spread Spectrum Multiplier Clock
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
FIN 1
S0^ 2
S1^ 3
S2 ^v 4
8 VDD
7 S3 ^v
6 FOUT
5 GND
FIN = 30 ~ 120 Mhz
Note: . v: 120KΩ Internal Pull down. ^: 120KΩ Internal Pull up.
OUTPUT CLOCK (FOUT) SELECTION
S0
S1
S2
S3
FIN Range
(MHz)
FOUT
Spread Spectrum
modulation
frequency
0
0
0
0
30 - 60
X1
0
0
0
1
30 - 60
X1
0
0
1
0
30 - 60
X1
0
0
1
1
30 - 60
X1
0
1
0
0
30 - 60
X2
0
1
0
1
30 - 60
X2
0
1
1
0
30 - 60
X2
0
1
1
1
30 - 60
X2
1
0
0
0
30 - 60
X2
Fin / 512
1
0
0
1
30 - 60
X2
1
0
1
0
30 - 45
X4
1
0
1
1
30 - 45
X4
1
1
0
0
60 - 120
X1
1
1
0
1
60 - 120
X1
1
1
1
0
60 - 120
X1
1
1
1
1
60 - 120
X1
47745 Fremont Blvd., Fremont, California 94538 TEL [phone] FAX [phone]
Spread Spectrum
±0.75%
±1.00%
-2.50%
0.5-1.5%
±0.25%
±0.5%
±0.75%
±1.00%
-2.50%
0.5-1.5%
0.25-1.25%
0.5-1.5%
±0.25%
±0.50%
0.25-1.25%
0.5-1.5%
Rev 09/26/02 Page 1