Pl tronics, Inc.
.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
SM4445T Series
CMOS with Enable/ Disable
Fundamental or 3rd Overtone Crystal Used
Standard Specifications
Overall Frequency Stability
Operating Temperature Range
Supply Voltage (Vcc)
Symmetry (Duty Cycle)
Logic Levels
Output Load
Enable/Disable Option (E/D)
Rise and Fall Time (Tr & Tf)
Input Current (Icc)
Stand-by Current
PRELIMINARY SPEC
4 Pad 3.2 x 2.5mm Leadless Surface Mount Ceramic Clock Oscillator
1.000 MHz
–
100.000 MHz
Part Numbering Guide
Portions of the part number that appear after the frequency may not be marked on part (C of C provided)
SM44 45 T V - 50.0M - XXX
(Internal Code or blank)
Packaging
Tray or
8mm tape
4mm pitch
Model
Frequency Stability
45 = ± 50 PPM
00 = ± 100 PPM
Frequency in MHz
Special Specifications (choose all that apply)
°
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%
W: Supply Voltage of 2.5 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
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.
.03 (0.8)
GND
.126
(3.2 ± 0.1)
OUT
.047 (1.2)
For Best Performance,
Do NOT allow any traces other
than ground under oscillators
(Even in buried layers)
2
PLE
3
3
2
.039 (1.0)
0.01
m
F
1
E/D
.039 (1.0)
MAX
4
Vcc
4
.043 (1.1)
1
.051 (1.3)
.098 (2.5 ± 0.1)
bypass capacitor
.036 (0.9)
Oct 2003
Pl tronics, Inc.
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
TBD
CMOS < 80 MHz
Page 12 - 19
SM4400T: ± 100 PPM, SM4445T:
±
50 PPM over Operating Temp. Range
0 to +70°C is standard, but can be extended to
-
40 to +85°C for certain frequencies
2.5 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 15 pF (typ. 1 ASIC) 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”.
5 ns maximum
10 mA maximum
50 uA maximum
嵌入式系统
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