PLL520-38/-39
PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)
FEATURES
•
•
•
•
•
•
•
65MHz to 130MHz Fundamental Mode Crystal.
Output range: 65MHz – 130MHz (no PLL).
Low Injection Power for crystal 50uW.
PECL (PLL520-38) or LVDS output (PLL520-39).
Integrated variable capacitors.
Supports 2.5V or 3.3V-Power Supply.
Available in 16-Pin (TSSOP or 3x3 QFN).
PIN CONFIGURATION
VDD
XIN
XOUT
N/C
N/C
OE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
N/C
N/C
GND
CLKC
VDD
CLKT
N/C
N/C
PLL 520-3x
DESCRIPTION
The PLL520-38/-39 is a family of VCXO IC’s
specifically designed to pull high frequency
fundamental crystals from 65MHz to 130MHz, with
selectable PECL or LVDS outputs.. They achieve
very low current into the crystal resulting in better
overall stability. Their internal varicaps allow an on
chip frequency pulling, controlled by the VCON
input. Their very low jitter makes them ideal for the
most demanding timing requirements.
VCON
GND
VDD
VDD
N/C
10
XIN
XOUT
N/C
12
13
14
15
16
1
11
N/C
9
8
7
6
5
GND
CLKC
VDD
CLKT
P520-3x
2
3
4
BLOCK DIAGRAM
OE
GND
GND
OE
VCON
Oscillator
Amplifier
w/
XIN
integrated
varicaps
XOUT
Q
Q
OUTPUT ENABLE LOGICAL LEVELS
Part #
PLL520-38
OE
0
(Default)
1
0
1
(Default)
State
Output enabled
Tri-state
Tri-state
Output enabled
PLL520-38/-39
PLL520-39
OE input: Logical states defined by PECL levels for PLL520-38
Logical states defined by CMOS levels for PLL520-39
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/20/04 Page 1
VCON
GND
PLL520-38/-39
PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)
PIN DESCRIPTIONS
Name
XIN
XOUT
OE
VCON
GND
CLKT
CLKC
N/C
VDD
Number
2
3
6
7
8, 14
11
13
4,5,9,10,15,16
1, 12
Type
I
I
I
I
P
O
O
-
P
Description
Crystal input. See Crystal Specifications on page 2.
Crystal output. See Crystal Specifications on page 2.
Output enable. See Output Enable Logic table on page 1.
Voltage control input.
Ground.
True output PECL (PLL520-38) or LVDS (PLL520-39).
Complementary output PECL (PLL520-38) or LVDS (PLL520-39).
Not connected.
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
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
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. Crystal Specifications
PARAMETERS
Built-in Capacitance
Inter-electrode capacitance
C0/C1 ratio (gamma)
Oscillation Frequency
SYMBOL
CX+
CX-
C
0
γ
OF
CONDITIONS
65MHz to 130MHz
(VDD=3.3V)
MIN.
TYP.
MAX.
2
2
UNITS
pF
-
MHz
2.6
65
300
130
Fund.
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/20/04 Page 2
PLL520-38/-39
PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)
3. Voltage Control Crystal Oscillator (3.3V)
PARAMETERS
VCXO Stabilization Time *
VCXO Tuning Range
CLK output pullability
On-chip Varicaps control range
Linearity
VCXO Tuning Characteristic
VCON input impedance
VCON modulation BW
SYMBOL
T
VCXOSTB
CONDITIONS
From power valid
F
XIN
= 100 – 200MHz;
XTAL C
0
/C
1
< 250
0V
≤
VCON
≤
3.3V
VCON=1.65V,
±1.65V
VCON = 0 to 3.3V
MIN.
TYP.
MAX.
10
UNITS
ms
ppm
ppm
pF
%
ppm/V
kΩ
kHz
200*
±100*
4 – 18*
10*
65
60
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.
4. General Electrical Specifications
PARAMETERS
Supply Current (Loaded
Outputs)
Operating Voltage
Output Clock Duty Cycle
Short Circuit Current
SYMBOL
I
DD
V
DD
CONDITIONS
PECL/LVDS
@ 1.25V (LVDS)
@ V
DD
– 1.3V (PECL)
MIN.
TYP.
MAX.
100/80
UNITS
mA
V
%
mA
2.97
45
45
50
50
±50
3.63
55
55
5. Jitter Specifications
PARAMETERS
Period jitter RMS
Period jitter peak-to-peak
Integrated jitter RMS
CONDITIONS
77.76MHz
77.76MHz
Integrated 12 kHz to 20 MHz at 77.76MHz
MIN.
TYP.
2.5
18.5
0.5
MAX.
UNITS
ps
ps
ps
6. Phase Noise Specifications
PARAMETERS
Phase Noise relative
to carrier
FREQUENCY
77.76MHz
@10Hz
-75
@100Hz
-95
@1kHz
-125
@10kHz
-145
@100kHz
-155
UNITS
dBc/Hz
Note: Phase Noise measured at VCON = 0V
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/20/04 Page 3
PLL520-38/-39
PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)
7. LVDS Electrical Characteristics
PARAMETERS
Output Differential Voltage
V
DD
Magnitude Change
Output High Voltage
Output Low Voltage
Offset Voltage
Offset Magnitude Change
Power-off Leakage
Output Short Circuit Current
SYMBOL
V
OD
∆V
OD
V
OH
V
OL
V
OS
∆V
OS
I
OXD
I
OSD
CONDITIONS
MIN.
247
-50
TYP.
355
1.4
1.1
1.2
3
±1
-5.7
MAX.
454
50
1.6
1.375
25
±10
-8
UNITS
mV
mV
V
V
V
mV
uA
mA
R
L
= 100
Ω
(see figure)
0.9
1.125
0
V
out
= V
DD
or GND
V
DD
= 0V
8. LVDS Switching Characteristics
PARAMETERS
Differential Clock Rise Time
Differential Clock Fall Time
LVDS Levels Test Circuit
OUT
SYMBOL
t
r
t
f
CONDITIONS
R
L
= 100
Ω
C
L
= 10 pF
(see figure)
MIN.
0.2
0.2
TYP.
0.7
0.7
MAX.
1.0
1.0
UNITS
ns
ns
LVDS Switching Test Circuit
OUT
50Ω
C
L
= 10pF
V
OD
V
OS
V
DIFF
R
L
= 100Ω
50Ω
C
L
= 10pF
OUT
OUT
LVDS Transistion Time Waveform
OUT
0V (Differential)
OUT
80%
V
DIFF
20%
0V
80%
20%
t
R
t
F
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/20/04 Page 4
PLL520-38/-39
PECL and LVDS Low Phase Noise VCXO (for 65-130MHz Fund Xtal)
9. PECL Electrical Characteristics
PARAMETERS
Output High Voltage
Output Low Voltage
SYMBOL
V
OH
V
OL
CONDITIONS
R
L
= 50
Ω
to (V
DD
– 2V)
(see figure)
MIN.
V
DD
– 1.025
MAX.
V
DD
– 1.620
UNITS
V
V
10. PECL Switching Characteristics
PARAMETERS
Clock Rise Time
Clock Fall Time
SYMBOL
t
r
t
f
CONDITIONS
@20/80% - PECL
@80/20% - PECL
MIN.
TYP.
0.6
0.5
MAX.
1.5
1.5
UNITS
ns
ns
PECL Levels Test Circuit
OUT
VDD
OUT
PECL Output Skew
50Ω
2.0V
50%
50Ω
OUT
OUT
t
SKEW
PECL Transistion Time Waveform
DUTY CYCLE
45 - 55%
55 - 45%
OUT
80%
50%
20%
OUT
t
R
t
F
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/20/04 Page 5
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