LC55P Series
CMOS Clock Oscillators
October 2011
PRELIMINARY
• Pletronics’ LC55P Series is an precision square
wave oscillator with a CMOS output.
• This rugged, all silicon design, does not rely on
vibrating or resonating mechanical structures.
• The LC55P Series is exceptionally resistant to
mechanical shock and vibration.
• This low cost oscillator is a drop in replacement for
traditional crystal oscillators in most applications.
•
•
•
•
•
•
Frequencies from 8MHz to 125 MHZ
Supply voltages from 1.8V to 3.3V
Very Low Power consumption
3.2 x 5 mm Plastic Package
Enable/Disable Function
Low Jitter
Available Frequencies:
8.0MHz, 12.0MHz, 16.0MHz, 20.0MHz, 25.0MHz, 40.0MHz, 50.0MHz, 62.5MHz,
66.0MHz, 75.0MHz, 80.0MHz, 100.0MHz, 125.0MHz
*Contact
factory for other frequencies.
Function Description and Block Diagram:
The LC55 oscillator series utilizes an advanced CMOS integrated
circuit for all timing and compensation. There are no vibrating or
resonating mechanical structures within the LC55. All of the
oscillators circuit elements are incorporated on a single
monolithic IC. All set-up and compensation parameters are
stored in the LC55's internal eePROM. The oscillator has very
fast start-up time from the low power standby state.
This device is an excellent, low cost, alternative to many other
frequency controlling solutions. The LC55 is especially suited to
those applications where immunity to high shock and vibration
are important.
Absolute Maximum Ratings:
Parameter
V
CC
Supply Voltage
Vi
Vo
Input Voltage
Output Voltage
Unit
-0.5V to +4.6V
-0.5V to V
CC
+ 0.5V
-0.5V to V
CC
+ 0.5V
-65
o
C to 150
o
C
Storage Temperature
Product information is current as of publication date. The product conforms
to specifications per the terms of the Pletronics standard warranty. Production
processsing does not necessarily include testing of all parameters.
Copyright © 2011 Pletronics Inc.
LC55P Series
CMOS Clock Oscillators
October 2011
Electrical Specification
1
for 1.8V to 3.3V _10% over the specified temperature
+
range
Item
Frequency Range
Frequency Stability
Min
8
-100
Typ.
Max
125
+100
Unit
MHZ
ppm
For all supply voltages, load changes,
aging for 10 years, shock, vibration and
temperatures
Condition
Output Waveform
Output High Level
Output Low Level
Output Symmetry
90
-
45
40
Output T
RISE
and T
FALL
-
-
-
Phase Noise
10 Hz
100 Hz
1 KHz
10 KHz
100 KHz
1 MHz
10MHz
-
50
-
0
-55
2.0
2.3
2.5
-15
-45
-75
-100
-123
-142
-147
CMOS
-
10
55
60
2.75
2.30
1.9
%
%
%
%
nS
nS
nS
dBc/Hz
I
OH
= 1 mA
I
OL
= -1 mA
< 100 MHZ
$100
MHZ
V
CC
= 1.8 V
V
CC
= 2.5 V
V
CC
= 3.3 V
at 50% point of V
CC
(See load circuit)
C
LOAD
= 4 pF
C
LOAD
= none
of V
CC
(See load circuit)
Standby Current I
CC
Startup and Enable time
Disable time
Operating Temperature Range
Storage Temperature Range
V
CC
Supply Current (I
CC
)
1
400
100
+70
+105
2.5
2.8
3.0
uA
uS
nS
o
Pad 1 low, device disabled
Output to reach a logic state and
frequency
Time for output to reach a high Z state
Standard Temperature Range
C
C
o
mA
mA
mA
V
CC
= 1.8 V
V
CC
= 2.5 V
V
CC
= 3.3 V
C
LOAD
= none
Notes: 1.The electrical parameters are guaranteed by design and characterization over the specified operating
temperature range. Unless stated otherwise these tests are done with Pin 1 E/D open circuit.
www.pletronics.com
425-776-1880
2
LC55P Series
CMOS Clock Oscillators
October 2011
Mechanical:
Inches
A
B
C
D
1
E
1
F
1
0.197 +0.002
_
0.126 +0.002
_
0.033 +0.002
_
0.000 - 0.002
0.047
0.035
mm
5.00 +0.05
_
3.20 +0.05
_
0.85 +0.05
_
0.00 - 0.05
1.20
0.90
Not to Scale
1
Typical dimensions
Pad
1
2
3
4
Function
Enable/Disable
Ground (GND)
Output
Supply Voltage
(V
CC
)
Note
A logic low on this pin disables the oscillator output. This pin may be left open or
connected to V
CC
if the disable function is not used.
When disabled there is a weak pull-down to ground internally
Recommend connecting appropriate power supply bypass capacitors as close as
possible.
Layout and application information
For Optimum Jitter Performance, Pletronics recommends:
• a ground plane under the device.
• no transient signals be routed under the device
• do not place near magnetic sources such as switching power supplies
• do not place near piezoelectric buzzers or fans.
• place a 0.01 uF bypass capacitor as close as practical to the oscillator.
www.pletronics.com
425-776-1880
3
LC55P Series
CMOS Clock Oscillators
October 2011
Thermal Characteristics
The maximum die or junction temperature is 155
o
C
The thermal resistance junction to board is 30 to 50
o
C/Watt depending on the solder pads, ground plane
and construction of the PCB.
ESD Rating
Model
Minimum Voltage
Conditions
Human Body Model
Charged Device Model
4000
1000
JESD22-A114D
JESD22-C101
Load Circuit and Test Waveform
Symmetry
Vhigh
80% * Vcc
50% * Vcc
20% * Vcc
Vlow
Ground
Trise
Tfall
www.pletronics.com
425-776-1880
4
LC55P Series
CMOS Clock Oscillators
October 2011
Part Number:
LC5500P
V
-
5.0M
2
-XX
Packaging code or blank
T250
= 250 per Tape and Reel
T500
= 500 per Tape and Reel
T1K
= 1000 per Tape and Reel
Frequency in MHz
Voltage Range
V
= 1.8 to 3.3 volts
Temperature Range
Blank
= Temp. range 0 to +70
o
C
Series Model
Part Marking and Legend:
PLC5
*YWW**
C
ff.fffM*
PLC5
= Pletronics
*YWW**
= Y Last digit of year, WW Calender work week, * internal code
ff.fff
M
*
= Frequency in MHZ, * internal code
All other marking is internal factory codes
Specifications such as frequency stability, supply voltage and operating temperature range, etc. are
not identified from the marking. External packaging labels and packing list will correctly identify the
complete Pletronics part number.
Codes for Date Code YMD
Code
1
Code
A
2
3
4
5
B
C
D
E
F
G
H
J
K
L
M
Year
2011 2012 2013 2014 2015
Month
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Code
Day
Code
Day
1
1
H
17
2
2
J
18
3
3
K
19
4
4
L
20
5
5
M
21
6
6
N
22
7
7
P
23
8
8
R
24
9
9
T
25
A
10
U
26
B
11
V
27
C
12
W
28
D
13
X
29
E
14
Y
30
F
15
Z
31
G
16
www.pletronics.com
425-776-1880
5
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