19013 36th Ave. West
Suite H
Lynnwood, WA 98036, USA
SM1145C Series
4 Lead Surface Mount Plastic Clock Oscillator
CMOS with Enable/ Disable
Use SM1145T or SM8845C Series for Non-Std Specs and Frequencies
Solder Pad Compatible to our SM11 Series, Epson SG615 & SG8002J
Standard Specifications
Overall Frequency Stability
Operating Temperature Range
Supply Voltage (Vcc)
Symmetry (Duty Cycle)
Logic Levels
Output Load
Enable/Disable Option (E/D)
SM1145C: ± 50 PPM, SM1144C: ± 25 PPM over Operating Temperature Range
0 to +70°C is standard, but can be extended to
-
40 to +85°C for certain frequencies
5.0 volts and 3.3 volts available, .01 µF bypass cap recommended
40/60 to 60/40% is standard, but 45/55% at 50% of Vcc is also available (see Waveform 1)
Logic “1”
90% of Vcc MIN;
Logic “0”
10% of Vcc MAX
Standard load is 15pF maximum, see Test Circuit 2 (consult factory for
heavier
loads)
Output enabled when Pin #1 is open or at Logic “1”; Output disabled when Pin #1 is at Logic “0”.
Supply Current
Icc (mA) w/ 15pF load
Typical
Maximum
Rise and Fall Time
Tr & Tf (nS) w/ 15pF load
Typical
Maximum
1.000 MHz
–
60.000 MHz
Frequency Range
(MHz)
1.000
8.000
24.000
30.000
50.001
–
–
–
–
–
7.999
23.999
29.999
50.000
60.000
5.0
8.0
10.0
25.0
35.0
10.0
15.0
15.0
30.0
40.0
5.5
5.5
4.5
2.5
2.5
6.5
6.5
5.5
3.5
3.5
Part Numbering Guide
Packaging
Tube or
24mm tape
12mm pitch
SM11 45 C Y -- 50.0M - 30
Model
Frequency Stability
45 = ± 50 PPM
44 = ± 25 PPM
Non-Std Output Load
Blank = 15 pF max, 30 = 30 pF max, 50 = 50 pF max
Frequency in MHz
Special Specifications (choose all that apply)
Y: Std Specs (5.0V
± 10%,
0 to +70
°
C, 40/60% Symmetry)
E: Extended Operating Temperature Range (- 40 to +85
°
C)
S: 45/55% Symmetry at 50% of Vcc
V: Supply Voltage of 3.3 volts
± 10%
Consult factory for available frequencies and specs. Not all options available for all frequencies. A special part number may be assigned.
Frequency Stability is inclusive of frequency shifts due to calibration, temperature, supply voltage, shock, vibration and load
Mechanical: inches (mm)
not to scale
Solder Pads
.15 (3.8)
Due to part size and factory abilities, part marking may vary from lot to lot and may contain our part number or an internal code.
.551 (14.0) MAX
.386 (9.8) MAX
.185 (4.7) MAX
4
.341 (8.65)
.300 (7.62)
.12
(3.0) .23 (5.8)
4
Vcc
E/D
1
3
OUT
GND
2
3
0.01
m
F
bypass capacitor
1
2
Feb 2002
.200 (5.08)
.05 (1.3)
Pl tronics, Inc.
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
13
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