Low EMI Spread Spectrum Multiplier Clock

Preliminary
PLL701-21
Low EMI Spread Spectrum Multiplier Clock
FEATURES
•
Spread Spectrum Clock Generator with selectable
SST mode.
Output frequency ranges: 24MHz to 200MHz.
Selectable Center Spread Modulation.
TTL/CMOS compatible outputs.
3.3V Operating Voltage.
Low short-term jitter.
Available in 8-Pin 150mil SOIC GREEN/RoHS
compliant packaging.
FIN
1
S2^
2
S1^
3
S0v
4
PLL701-21
•
•
•
•
•
•
PIN CONFIGURATION
8
VDD
7
S3^
6
FOUT
5
GND
FIN = 24 ~ 200 Mhz
Note: v: 30kΩ Internal Pull down. ^: 30kΩ Internal Pull up.
DESCRIPTION
SST BY-PASS SELECTOR
The PLL701-21 is a Spread Spectrum Clock
Generator designed for the purpose of reducing EMI
in high-speed digital systems, with selectable Center
Spread modulation magnitude (see table below). The
device operates over a very wide range of input
frequencies and provides a 1x modulated clock
output.
S3
Spread Spectrum Mode
0
OFF
1
ON (See below) Default
Note: S3 has an internal Pull Up. Default=”1”
MODULATION MAGNITUDE SELECTION
S2
S1
S0
FIN Range
(MHz)
Spread Spectrum Modulation
FOUT
Frequency
0
0
0
0
0
0
1
1
0
1
0
1
24
24
24
24
-
200
200
200
200
X1
X1
X1
X1
1
1
1
1
0
0
1
1
0
1
0
1
24
24
24
24
-
200
200
200
200
X1
X1
X1
X1
Fin / 1024
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Magnitude
±0.75%
±1.00%
±1.25%
±0.125%
±0.25%
±0.50%
±0.375%
±0.625%
Rev 11/09/09 Page 1
Preliminary
PLL701-21
Low EMI Spread Spectrum Multiplier Clock
BLOCK DIAGRAM
PLL
SST
FIN
FOUT
Control
S(0:3)
Logic
PIN DESCRIPTIONS
Name
Number
Type
Description
FIN
1
I
S2
2
I
S1
3
I
S0
4
I
GND
FOUT
S3
VDD
5
6
7
8
P
O
I
P
Input Clock Frequency. 24MHz to 200MHz.
Digital control input for SST modulation magnitude selection. Has internal pullup.
Digital control input for SST modulation magnitude selection. Has internal pullup.
Digital control input for SST modulation magnitude selection. Has internal pulldown.
Ground.
SST Modulated Clock Frequency Output.
SST By-Pass Selector. S3 has internal pull-up. Default =”1”
3.3V Power Supply.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS
Supply Voltage
Input Voltage, dc
Output Voltage, dc
Storage Temperature
Ambient Operating Temperature*
Junction Temperature
Lead Temperature (soldering, 10s)
ESD Protection, Human Body Model
SYMBOL
MIN.
V DD
VI
VO
TS
TA
TJ
-0.5
-0.5
-65
-40
MAX.
UNITS
4.6
V DD +0.5
V DD +0.5
150
85
125
260
2
V
V
V
°C
°C
°C
°C
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.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 11/09/09 Page 2
Preliminary
PLL701-21
Low EMI Spread Spectrum Multiplier Clock
2. DC/AC Specifications
PARAMETERS
SYMBOL
Supply Voltage
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
V DD
V IH
V IL
I IH
I IL
Output High Voltage
Output Low Voltage
Input Frequency
Maximum interruption of F IN
Input Capacitance
Pull-up Resistor
Pull-down Resistor
Short Circuit Current
3.3V Dynamic Supply Current
V OH
V OL
F IN
C in1
R pu
R pd
I sc
I CC
CONDITIONS
MIN.
TYP.
2.97
0.7* V DD
MAX.
UNITS
3.63
V
V
V
0.3* V DD
100
100
I OH =5mA, V DD =3.3V
I OL =6mA, V DD =3.3V
2.4
0.4
200
100
24
4
30
30
50
20
PIN 2, 3, 7
PIN 4
No Load
µA
µA
V
V
MHz
µs
pF
kΩ
kΩ
mA
mA
3. TIMING CHARACTERISTICS
PARAMETERS
SYMBOL
Rise Time
Tr
Fall Time
Tf
Output Duty Cycle
Cycle to Cycle Jitter
DT
T cyc-cy c
CONDITIONS
Measured at 0.8V ~ 2.0V @ 3.3V,
15pF Load
Measured at 2.0V ~ 0.8V @ 3.3V,
15pF Load
MIN.
TYP.
MAX.
UNITS
0.8
0.95
1.1
ns
0.78
0.85
0.9
ns
45
50
55
100
%
ps
Over output frequency range @ 3.3V
FUNCTIONAL DESCRIPTION
Selectable spread spectrum a nd modulat ion 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 30kΩ while pins 2, 3 and 7 (S2, S1 and S3) have an
internal pull-up resistor of 30kΩ. 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).
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 11/09/09 Page 3
Preliminary
PLL701-21
Low EMI Spread Spectrum Multiplier Clock
PACKAGE INFORMATION (GREEN PACKAGE COMPLIANT)
8 PIN Narrow SOIC ( mm )
SOIC
Symbol
Min.
Max.
A
1.47
1.73
A1
B
C
0.10
0.33
0.19
0.25
0.51
0.25
D
E
4.80
3.80
4.95
4.00
H
L
e
5.80
0.38
6.20
1.27
1.27 BSC
E
H
D
A
A1
C
L
B
e
ORDERING INFORMATION (GREEN PACKAGE COMPLIANT)
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 -21 S C- L
PART NUMBER
PB free
PACKAGE TYPE
S=SOIC
TEMPERATURE
C=COMMERCIAL
I=INDUSTRIAL
Order Number
PLL701-21SC-LR
PLL701-21SC-L
Marking
P701-21SCL
P701-21SCL
Package Option
SOIC -Tape and Reel
SOIC -Tube
PhaseLink Corporation, reserves the right to make changes in its produc ts 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.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 11/09/09 Page 4