PLL620-38/39
PECL and LVDS Low Phase Noise XO (32.5 to 130MHz output)
FEATURES
•
•
•
•
•
•
65MHz to 130MHz Crystal input.
Output range: 32.5MHz – 130MHz (no PLL).
Low Injection Power for crystal, 50uW.
PECL (PLL620-38) or LVDS output (PLL620-39).
Supports 2.5V or 3.3V-Power Supply.
Available in 16-Pin TSSOP.
PIN CONFIGURATION
DESCRIPTION
The PLL620-38/-39 is a family of XO IC’s specifically
designed to work with high frequency fundamental or
3
rd
OT 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 very low jitter makes them
ideal for the most demanding timing requirements.
!
Note: ^ designates internal pull-up resistor.
BLOCK DIAGRAM
OE
Q
XIN
XOUT
Oscillator
Amplifier
OUTPUT ENABLE LOGICAL LEVELS
Part #
PLL620-38
OE
0
(Default)
1
0
1
(Default)
State
Output enabled
Tri-state
Tri-state
Output enabled
Q
S2
PLL620-38/-39
PLL620-39
OE input: Logical states defined by PECL levels for PLL620-38
Logical states defined by CMOS levels for PLL620-39
OUTPUT FREQUENCY SELECTOR
S2
0
1(Default)*
*Internally set to ‘Default’ through 60K
Output
Input/2
Input
pull-up resistor
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/15/05 Page 1
PLL620-38/-39
PECL and LVDS Low Phase Noise XO (for 32.5-130MHz Output)
PIN DESCRIPTIONS
Name
XIN
XOUT
S2
OE_CTRL
GND
CLKT
CLKC
DNC
VDD
Number
2
3
5
6
8, 14
11
13
4,7,10,15,16
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.
When pulled low the output is equal to the input divided by 2. Internal
pull up.
Output enable. See Output Enable Logic table on page 1.
Ground.
True output PECL (PLL620-38) or LVDS (PLL620-39).
Complementary output PECL (PLL620-38) or LVDS (PLL620-39).
Do Not connect.
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
Crystal Loading Rating
Inter-electrode capacitance
Crystal Resonator Frequency
SYMBOL
C
L (xtal)
C
0
F
XIN
CONDITIONS
65MHz to 130MHz
(VDD=3.3V)
Fund.
MIN.
TYP.
8.5
2.6
MAX.
UNITS
pF
65
130
MHz
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/15/05 Page 2
PLL620-38/-39
PECL and LVDS Low Phase Noise XO (for 32.5-130MHz Output)
3. 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
4. Jitter Specifications
PARAMETERS
Period jitter RMS
Period jitter peak-to-peak
Integrated jitter RMS
77.76MHz
77.76MHz
Integrated 12kHz to 20MHz at 77.76MHz
CONDITIONS
MIN.
TYP.
2.5
18.5
0.5
MAX.
UNITS
ps
ps
ps
5. 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
47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991
www.phaselink.com
Rev 09/15/05 Page 3
PLL620-38/-39
PECL and LVDS Low Phase Noise XO (for 32.5-130MHz Output)
6. 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
7. 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
C
L
= 10pF
50Ω
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 09/15/05 Page 4
PLL620-38/-39
PECL and LVDS Low Phase Noise XO (for 32.5-130MHz Output)
8. 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
9. 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 09/15/05 Page 5
Embedded System
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