The PLL502-51 is a monolithic low jitter, high per-
formance CMOS VCXO IC. It allows control of the
output frequency with an input voltage (VCON), us-
ing a low cost crystal.
This makes the PLL502-51 ideal for a wide range of
applications from 20MHz to 52MHz (including
27MHz, 35.328MHz, etc.).
OUTPUT RANGE
MULTIPLIER
No PLL
FREQUENCY
RANGE
20 - 52MHz
OUTPUT
BUFFER
CMOS
BLOCK DIAGRAM
XIN
XOUT
XTAL
OSC
VARICAP
CLK
OE
VCON
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
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Rev 12/14/05 Page 1
PLL502-51
Low Phase Noise VCXO (20MHz to 52MHz)
PIN DESCRIPTIONS
Name
XOUT
N/C
VCON
GND
CLK
VDD
OE
XIN
Number
1
2
3
4
5
6
7
8
Type
I
-
I
P
O
P
I
I
Description
Crystal output. See Crystal Specification on page 4.
Not connected.
Voltage Control input.
Ground.
Output clock.
Power supply.
Output enable input. Disables (tri-state) output when low. Internal pull-up
enables output by default if pin is not connected to low.
Crystal input. See Crystal Specification on page 4.
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
V
DD
V
I
V
O
T
S
T
A
T
J
MIN.
-0.5
-0.5
-65
-40
MAX.
4.6
V
DD
+0.5
V
DD
+0.5
150
85
125
260
2
UNITS
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 con-
ditions 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 Electrical Specifications
PARAMETERS
Supply Current, Dynamic, with
Loaded Outputs
Operating Voltage
Output drive current
(High Drive)
Output drive current
(Standard Drive)
Short Circuit Current
VCXO Control Voltage
SYMBOL
I
DD
V
DD
I
OH
I
OL
I
OH
I
OL
VCON
CONDITIONS
F
XIN
= 20 - 52MHz
Output load of 10pF
V
OH
= V
DD
-0.4V, V
DD
=3.3V
V
OL
= 0.4V, V
DD
= 3.3V
V
OH
= V
DD
-0.4V, V
DD
=3.3V
V
OL
= 0.4V, V
DD
= 3.3V
MIN.
TYP.
10
MAX.
UNITS
mA
2.25
30
30
10
10
±50
0
3.63
V
DD
V
mA
mA
mA
mA
mA
V
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 12/14/05 Page 2
PLL502-51
Low Phase Noise VCXO (20MHz to 52MHz)
3. AC Electrical Specifications
PARAMETERS
Input Crystal Frequency
Output Clock Rise/Fall Time
(Standard Drive)
Output Clock Rise/Fall Time
(High Drive)
Output Clock Duty Cycle
SYMBOL
CONDITIONS
0.3V ~ 3.0V with 15 pF load
0.3V ~ 3.0V with 15 pF load
Measured @ 50% V
DD
MIN.
20
TYP.
2.4
1.2
MAX.
52
UNITS
MHz
ns
45
50
55
%
4. Voltage Control Crystal Oscillator (3.3V)
PARAMETERS
VCXO Stabilization Time *
VCXO Tuning Range
CLK output pullability
VCXO Tuning Characteristic
Pull range linearity
VCON input impedance
VCON modulation BW
SYMBOL
T
VCXOSTB
CONDITIONS
From power valid
F
XIN
= 20 - 52MHz;
XTAL C
0
/C
1
< 250
0V
≤
VCON
≤
3.3V
VCON=1.65V
±1.65V
MIN.
TYP.
MAX.
10
UNITS
ms
ppm
ppm
ppm/V
%
kΩ
kHz
500
±200
150
10
80
0V
≤
VCON
≤
3.3V, -3dB
25
Note:
Parameters denoted with an asterisk (*) represent nominal characterization data and are not production tested to any specific limits.
5. Jitter Specifications
PARAMETERS
Period jitter RMS
Period jitter peak-to-peak
Integrated jitter RMS
CONDITIONS
35.328 MHz
35.328MHz
Integrated 12 kHz to 20 MHz at
35.328MHz
MIN.
TYP.
2.3
18
1
MAX.
UNITS
ps
ps
ps
6. Phase Noise Specifications
PARAMETERS
Phase Noise relative
to carrier
Note: Phase Noise at VCON = 0V
FREQUENCY
51.85MHz
@10Hz
-65
@100Hz
-90
@1kHz
-120
@10kHz
-140
@100kHz
-147
UNITS
dBc/Hz
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 12/14/05 Page 3
PLL502-51
Low Phase Noise VCXO (20MHz to 52MHz)
7. Crystal Specifications
PARAMETERS
Crystal Resonator Frequency
Crystal Loading Rating
Crystal Pullability
Recommended ESR
SYMBOL
F
XIN
C
L
(xtal)
C
0
/C
1 (xtal)
R
E
CONDITIONS
Parallel Fundamental Mode
At Vcon = 1.65V
AT cut
AT cut
MIN.
20
TYP.
9.5
MAX.
52
250
30
UNITS
MHz
pF
-
Ω
Note:
Crystal Loading rating: 9.5pF is the loading the crystal sees from the VCXO chip at VCON = 1.65V. It is assumed that the crystal will be at nomi-
nal frequency at this load. If the crystal requires more load to be at nominal frequency, the additional load must be added externally.
This however may reduce the pull range
PACKAGE INFORMATION
8 PIN ( dimensions in mm )
Narrow SOIC
Symbol
A
A1
B
C
D
E
H
L
e
Min.
1.47
0.10
0.33
0.19
4.80
3.80
5.80
0.38
Max.
1.73
0.25
0.51
0.25
4.95
4.00
6.20
1.27
1.27 BSC
Min.
-
0.05
0.19
0.09
2.90
4.30
6.20
0.45
TSSOP
Max.
1.20
0.15
0.30
0.20
3.10
4.50
6.60
0.75
0.65 BSC
A1
B
C
L
e
A
D
E
H
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 12/14/05 Page 4
PLL502-51
Low Phase Noise VCXO (20MHz to 52MHz)
ORDERING INFORMATION
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
PLL502-51 H X C X R
PART NUMBER
Optional High Drive
PACKAGE TYPE
S=SOIC
O=TSSOP
NONE= TUBE
R=TAPE AND REEL
NONE=NORMAL PACKAGE
L=GREEN PACKAGE
TEMPERATURE
C=COMMERCIAL,
I=INDUSTRIAL
Order Number
PLL502-51OC
PLL502-51OC-R
PLL502-51OCL
PLL502-51OCL-R
PLL502-51HOC
PLL502-51HOC-R
PLL502-51HOCL
PLL502-51HOCL-R
PLL502-51SC
PLL502-51SC-R
PLL502-51SCL
PLL502-51SCL-R
PLL502-51HSC
PLL502-51HSC-R
PLL502-51HSCL
PLL502-51HSCL-R
Marking
P502-51OC
P502-51OC
P502-51OCL
P502-51OCL
P502-51HOC
P502-51HOC
P502-51HOCL
P502-51HOCL
P502-51SC
P502-51SC
P502-51SCL
P502-51SCL
P502-51HSC
P502-51HSC
P502-51HSCL
P502-51HSCL
Package Option
TSSOP – Tube
TSSOP - Tape and Reel
TSSOP – Tube, GREEN
TSSOP - Tape and Reel, GREEN
TSSOP – Tube
TSSOP - Tape and Reel
TSSOP – Tube, GREEN
TSSOP - Tape and Reel, GREEN
SOIC - Tube
SOIC - Tape and Reel
SOIC – Tube, GREEN
SOIC - Tape and Reel, GREEN
SOIC - Tube
SOIC - Tape and Reel
SOIC – Tube, GREEN
SOIC - Tape and Reel, GREEN
PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information fur-
nished 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 ex-
press written approval of the President of PhaseLink Corporation.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
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