SM44T Series 1.8 V
CMOS Clock Oscillators
September 2008
• Pletronics’ SM44 Series is a quartz crystal
controlled precision square wave generator with a
CMOS output.
• The package is designed for high density surface
mount designs.
• This is a low cost mass produced oscillator.
• Tape and Reel or cut tape packaging is available.
0.8 to 165 MHZ
2.5 x 3.2 mm LCC Ceramic Package
Enable/Disable Function
Disable function
includes low standby power mode
• Low Jitter
•
•
•
•
Pletronics Inc. certifies this device is in accordance with the
RoHS 6/6 (2002/95/EC) and WEEE (2002/96/EC) directives.
Pletronics Inc. guarantees the device does not contain the following:
Cadmium, Hexavalent Chromium, Lead, Mercury, PBB’s, PBDE’s
Weight of the Device: 0.041 grams
Moisture Sensitivity Level: 1 As defined in J-STD-020C
Second Level Interconnect code: e4
Absolute Maximum Ratings:
Parameter
V
CC
Supply Voltage
Vi
Vo
Io
Input Voltage
Output Voltage
Output Current
Unit
-0.5V to +7.0V
-0.5V to V
CC
+ 0.5V
-0.5V to V
CC
+ 0.5V
+25 mA to -25 mA
Thermal Characteristics
The maximum die or junction temperature is 155
o
C
The thermal resistance junction to board is 40 to 60
o
C/Watt depending on the solder pads, ground plane
and construction of the PCB.
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 © 2007, 2008 Pletronics Inc.
SM44T Series 1.8 V
CMOS Clock Oscillators
September 2008
Part Number:
SM44
45
T
E
X
-
75.0M
-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
Supply Voltage V
CC
X
= 1.8V _ 10%
+
Temperature Range
Blank
= Temp. range -10 to +70
o
C
E
= Temp. range -40 to +85
o
C
Series Model
Frequency Stability
45
= + 50 ppm
_
44
= + 25 ppm
_
20
= + 20 ppm
_
Series Model
Part Marking:
PFF.FFF
C
YMDxx
Marking Legend:
P
= Pletronics
FF.FFF
= Frequency in MHZ
YMD
= Date of Manufacture (year and week, or year-month-day)
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
ordered Pletronics part number.
Codes for Date Code YMD
Code
Year
Code
Month
Code
Day
Code
Day
Code
Day
1
1
D
13
T
25
6
2006
A
JAN
2
2
E
14
U
26
7
2007
B
FEB
3
3
F
15
V
27
8
2008
C
MAR
4
4
G
16
W
28
9
2009
D
APR
E
MAY
5
5
H
17
X
29
0
2010
F
JUN
6
6
J
18
Y
30
1
2011
G
JUL
7
7
K
19
Z
31
H
AUG
8
8
L
20
2
2012
J
SEP
9
9
M
21
K
OCT
A
10
N
22
L
NOV
B
11
P
23
M
DEC
C
12
R
24
www.pletronics.com
425-776-1880
2
SM44T Series 1.8 V
CMOS Clock Oscillators
September 2008
Electrical Specification for 1.80V _10% over the specified temperature range
+
Item
Frequency Range
Frequency Accuracy
“45"
“44"
Output Waveform
Output High Level
90
70
Output Low Level
-
-
Output Symmetry
Jitter
Output: 1 to 15 MHZ
Output: 15 to 35 MHZ
Output: 35 to 50 MHZ
Output: > 50 MHZ
Output: > 25 MHZ
E/D Internal Pull-up
V disable
V enable
Output leakage
V
OUT
= V
CC
V
OUT
= 0V
Standby Current I
CC
45
-
-
-
-
-
50
-
70
-10
-10
-
-
Enable time
Disable time
Start up time
Operating Temperature Range
-
-
-
-10
-40
Storage Temperature Range
-55
Min
0.8
-50
-25
Max
165
+50
+25
CMOS
-
-
10
30
55
6.0
5.0
4.0
3.0
0.7
500
30
-
+10
+10
4
100
250
250
10
+70
+85
+125
%
pS RMS
pS RMS
pS RMS
pS RMS
pS RMS
Kohm
%
%
uA
uA
uA
uA
nS
nS
mS
o
o
o
Unit
MHZ
ppm
Condition
For all supply voltages, load changes, aging for 1
year, shock, vibration and temperatures
%
of V
CC
for I
OH
= +2 mA <35 MHZ
of V
CC
for I
OH
= +8 mA > 35 MHZ
%
of V
CC
for I
OL
= -2 mA <35 MHZ
of V
CC
for I
OL
= -8 mA >35 MHZ
at 50% point of V
CC
(See load circuit)
10 Hz to 1 MHZ from the output frequency
12 KHz to 20 MHZ from the output frequency
to V
CC
of V
CC
applied to pin 1
Pin 1 low, device disabled
< 35 MHZ
> 35 MHZ
Time for output to reach a logic state
Time for output to reach a high Z state
Time for output to reach specified frequency
Standard Temperature Range
Extended Temperature Range
“E” Option
C
C
C
Electrical Specification for 1.80V _10% over the specified temperature range
+
www.pletronics.com
425-776-1880
3
SM44T Series 1.8 V
CMOS Clock Oscillators
September 2008
Item
Output T
RISE
and T
FALL
Typ
2
1
1.5
4
2
3
Max
5
3.5
2.5
10
7
7
2
2.5
3
18
27
37
2.5
3
4
20
Unit
nS
nS
nS
nS
nS
nS
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Condition
< 35 MHZ
> 35 MHZ and < 70 MHZ
> 70 MHZ
< 35 MHZ
> 35 MHZ and < 70 MHZ
> 70 MHZ
< 8 MHZ
> 8 MHZ and < 16 MHZ
> 16 MHZ and < 35 MHZ
> 35 MHZ and < 70 MHZ
> 70 MHZ and < 120 MHZ
> 120 MHZ
< 8 MHZ
> 8 MHZ and < 16 MHZ
> 16 MHZ and < 35 MHZ
> 35 MHZ and < 85 MHZ
C
LOAD
= 30 pF
C
LOAD
= 15 pF
C
LOAD
= 30 pF
20% to 80% of V
CC
See Load Circuit
C
LOAD
= 15 pF
20% to 80% of V
CC
See Load Circuit
V
CC
Supply Current (I
CC
)
1
1.5
2
12
17
23
1.5
2
3
10
Specifications with Pad 1 E/D open circuit
Typical phase noise plot for 5 oscillators at different output frequencies.
0
-20
-40
-60
dBc/Hz
19.4M
-80
-100
-120
-140
-160
-180
10
1,000
100,000
10,000,000
25M
32M
50M
66.7M
Frequency (Hz)
www.pletronics.com
425-776-1880
4
SM44T Series 1.8 V
CMOS Clock Oscillators
September 2008
Symmetry
Load Circuit and Test Waveform
Vhigh
80% * Vcc
50% * Vcc
20% * Vcc
Vlow
Ground
Trise
Tfall
Reliability
: Environmental Compliance
Parameter
Mechanical Shock
Vibration
Solderability
Thermal Shock
Condition
MIL-STD-883 Method 2002, Condition B
MIL-STD-883 Method 2007, Condition A
MIL-STD-883 Method 2003
MIL-STD-883 Method 1011, Condition A
ESD Rating
Model
Human Body Model
Charged Device Model
Minimum Voltage
1500
1000
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
Package Labeling
Label is 1" x 2.6" (25.4mm x 66.7mm)
Font is Courier New
Bar code is 39-Full ASCII
Label is 1" x 2.6" (25.4mm x 66.7mm)
Font is Arial
www.pletronics.com
425-776-1880
5
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
