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PLL701-21 Datasheet(PDF) 3 Page - PhaseLink Corporation

Part No. PLL701-21
Description  Low EMI Spread Spectrum Multiplier Clock
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Maker  PLL [PhaseLink Corporation]
Homepage  http://www.phaselink.com
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PLL701-21 Datasheet(HTML) 3 Page - PhaseLink Corporation

   
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Preliminary
PLL701-21
Low EMI Spread Spectrum Multiplier Clock
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 05/12/05 Page 3
2. DC/AC Specifications
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Supply Voltage
VDD
2.97
3.63
V
Input High Voltage
VIH
0.7* VDD
V
Input Low Voltage
VIL
0.3* VDD
V
Input High Current
IIH
100
µA
Input Low Current
IIL
100
µA
Output High Voltage
VOH
IOH=5mA, VDD =3.3V
2.4
V
Output Low Voltage
VOL
IOL=6mA, VDD =3.3V
0.4
V
Input Frequency
FIN
24
200
MHz
Maximum interruption of FIN
100
µs
Input Capacitance
Cin1
4
pF
Pull-up Resistor
Rpu
PIN 2, 3, 7
30
k
Pull-down Resistor
Rpd
PIN 4
30
k
Short Circuit Current
Isc
50
mA
3.3V Dynamic Supply Current
ICC
No Load
20
mA
3. TIMING CHARACTERISTICS
PARAMETERS
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Rise Time
Tr
Measured at 0.8V ~ 2.0V @ 3.3V
0.8
0.95
1.1
ns
Fall Time
Tf
Measured at 2.0V ~ 0.8V @ 3.3V
0.78
0.85
0.9
ns
Output Duty Cycle
DT
45
50
55
%
Input to Output Delay
2
4
ns
Cycle to Cycle Jitter
Tcyc-cyc
Over output frequency range @ 3.3V
100
ps
FUNCTIONAL DESCRIPTION
Selectable spread spectrum and modulation rates
The PLL701-21 provides Center Spread modulation, as well as a selectable modulation magnitude. Selection is
made by connecting pins 2 (S2), 3 (S1) and 4 (S0) to a logical “zero” or “one”, according to the modulation
magnitude selection table on page 1.
Default values for S(0:3) through internal pull-up and pull-down resistor
Selection pin 4 (S0) has an internal pull-down resistor of 30k
Ω while pins 2, 3 and 7 (S2, S1 and S3) have an
internal pull-up resistor of 30k
Ω. This internal pull-down (or pull-up) resistor will pull the input value to a logical
“zero” (or “one” respectively) by default, i.e. when no connection is made between the pin and VDD (GND
respectively). In order to override the internal pull-down (pull-up), the pin has to be connected to VDD (GND
respectively).


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