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
Internal Pull down. ^: 30k 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%
PLL701-11
1
2
3
4
5
6
7
8
FIN
S2^
S1^
S0
v
VDD
FOUT
GND
S3
v
FIN = 24 ~ 120 Mhz
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 2
BLOCK DIAGRAM
PIN DESCRIPTIONS
Name Number
Type
Description
FIN
1
I
Input Clock Frequency, 24MHz to 120MHz.
S2 2
I
Digital control input to select multiplication factor and SST modulation
amplitude. Has internal pull-up.
S1 3
I
Digital control input to select multiplication factor and SST modulation
amplitude. Has internal pull-up.
S0 4
I
Digital control input to select multiplication factor and SST modulation
amplitude. Has internal pull-down.
GND 5 P
Ground.
FOUT 6 O
SST Modulated Clock Frequency Output. The frequency before modulation is
synthesized by multiplying the input frequency by 1X, 2X, or 4X, depending on
S(0:3).
S3 7
I
Digital control input to select multiplication factor and SST modulation
amplitude. Has internal pull-down.
VDD 8 P
3.3V
Power
Supply.
FOUT
FIN
S(0:3)
PLL
SST
Control
Logic
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 3
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS SYMBOL
MIN.
MAX.
UNITS
Supply Voltage
V
DD
4.6 V
Input Voltage, dc
V
I
-0.5
V
DD
+0.5 V
Output Voltage, dc
V
O
-0.5
V
DD
+0.5 V
Storage Temperature
T
S
-65 150
C
Ambient Operating Temperature*
T
A
-40 85
C
Junction Temperature
T
J
125
C
Lead Temperature (soldering, 10s)
260
C
ESD Protection, Human Body Model
2
kV
Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the
device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other
conditions above the operational limits noted in this specification is not implied.
* Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only.
2. DC/AC Specifications
PARAMETERS SYMBOL CONDITIONS MIN.
TYP.
MAX.
UNITS
Supply Voltage
V
DD
2.97 3.63 V
Input High Voltage
V
IH
0.7*
V
DD
V
Input Low Voltage
V
IL
0.3*
V
DD
V
Input High Current
I
IH
100
A
Input Low Current
I
IL
100
A
Output High Voltage
V
OH
I
OH
=5mA, V
DD
=3.3V
2.4
Output Low Voltage
V
OL
I
OL
=6mA, V
DD
=3.3V 0.4
Input Frequency
F
IN
24
120
MHz
Maximum interruption of F
IN
none
s
Input Capacitance
C
in1
4 pF
Pull-up Resistor
R
pu
PIN 2, 3
30
k
Pull-down Resistor
R
pd
PIN 4, 7
30
k
Short Circuit Current
I
sc
50 mA
3.3V Dynamic Supply Current
I
CC
No
Load
20 mA
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 4
3. TIMING CHARACTERISTICS
PARAMETERS SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Rise Time
T
r
Measured at 0.8V ~ 2.0V @ 3.3V
0.8
0.95
1.1
ns
Fall Time
T
f
Measured at 2.0V ~ 0.8V @ 3.3V
0.78
0.85
0.9
ns
Output Duty Cycle
D
T
45 50 55 %
Input to Output Delay
2
4
ns
Cycle to Cycle Jitter
T
cyc-cyc
Over output frequency range @ 3.3V
100
ps
FUNCTIONAL DESCRIPTION
Selectable spread spectrum and modulation rates
The PLL701-11 provides selectable spread spectrum modulation, as well as selectable modulation rate. Selection
is made by connecting specific pins to a logical "zero" or "one", according to the output clock selection table and
modulation rate selection table on page 1.
Pins 2 (S2), 3 (S1), 4 (S0), and 7 (S3) are used as inputs to select the spread spectrum modulation and
multiplication factor as shown on the output clock selection table (page 1).
Default values for S(0:3) through internal pull-up and pull-down resistor
Selection pins S0 and S3 have an internal pull-down resistor of 30k
, pins 2 and 3 (S1 and S2) have an internal
pull-up resistor of 30k
. This internal pull-up (or pull-down) resistor will pull the input value to a logical "one" (or
"zero" respectively) by default, i.e. when no resistive load is connected between the pin and GND (VDD
respectively). In order to override the internal pull-up (pull-down), the pin has to be connected to GND (VDD
respectively).
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 5
PACKAGE INFORMATION
ORDERING INFORMATION
PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information
furnished by Phaselink is believed to be accurate and reliable. However, PhaseLink makes no guarantee or warranty concerning the accuracy of said
information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product.
LIFE SUPPORT POLICY: PhaseLink's products are not authorized for use as critical components in life support devices or systems without the
express written approval of the President of PhaseLink Corporation.
For part ordering, please contact our Sales Department:
47745 Fremont Blvd., Fremont, CA 94538, USA
Tel: (510) 492-0990 Fax: (510) 492-0991
PART NUMBER
The order number for this device is a combination of the following:
Device number, Package type and Operating temperature range
PLL701-11 X X X-R
Order Number
Marking
Package Option
PLL701-11SC P701-11SC
SOIC-Tube
PLL701-11SC-R P701-11SC
SOIC-Tape
and
Reel
PLL701-11SCL P701-11SCL
SOIC-Tube
(GREEN)
PLL701-11SCL-R P701-11SCL
SOIC-Tape
and
Reel
(GREEN)
C
L
A
8 PIN Narrow SOIC ( mm )
SOIC
Symbol
Min.
Max.
A
1.47
1.73
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
4.95
E
3.80
4.00
H
5.80
6.20
L
0.38
1.27
e
1.27 BSC
E
H
D
A1
e
B
PART NUMBER
TEMPERATURE
C=COMMERCIAL
I=INDUSTRIAL
PACKAGE TYPE
S=SOIC
NONE= NORMAL PACKAGE
L= GREEN PACKAGE
NONE= TUBE
R= TAPE AND REEL
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