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參數(shù)資料
| 型號： | SM4445TW-40.0M |
| 廠商： | PLETRONICS INC |
| 元件分類： | XO, clock |
| 英文描述： | OSC 2.5V SMT 3.2X2.5 CMOS |
| 中文描述： | CRYSTAL OSCILLATOR, CLOCK, 40 MHz, CMOS OUTPUT |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 81K |
| 代理商： | SM4445TW-40.0M |
SM4445T Series
4 Pad 3.2 x 2.5mm Leadless Surface Mount Ceramic Clock Oscillator
CMOS with Enable/ Disable
Fundamental or 3rd Overtone Crystal Used
Standard Specifications
Overall Frequency Stability
SM4445T: ± 50 PPM, SM4444T:
± 25 PPM over Operating Temp. Range
Operating Temperature Range
Supply Voltage (Vcc)
2.5 volts and 3.3 volts available, .01 μF bypass cap recommended
Symmetry (Duty Cycle)
45/55% at 50% of Vcc (see Waveform 1)
Output Load
Standard load is 15 pF (typ. 1 ASIC) maximum, see Test Circuit 2 (consult factory for heavier loads)
Enable/Disable Option (E/D)
Output enabled when Pin #1 is open or at Logic “1”; Output disabled when Pin #1 is at Logic “0”.
Part Numbering Guide
Model
Frequency Stability
45 = ± 50 PPM
44 = ± 25 PPM
SM44 45 T E V - 40.0M - XX (Internal Code or blank)
Consult factory for available frequencies and specs. Not all options available for all frequencies. A special part number may be assigned.
Mechanical:
not to scale
inches (mm)
Solder Pads
Mar 2006
0 to +70
°C is standard, but can be extended to - 40 to +85°C for certain frequencies
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
Pl tronics, Inc.
MAX
0.01 F
m
.098 (2.5 ± 0.1)
.039 (1.0)
.126
(3.2
±
0.1)
Vcc
E/D
GND
OUT
1
2
3
4
.043 (1.1)
.051 (1.3)
.047
(1.2)
.036 (0.9)
bypass capacitor
PLE
.03 (0.8)
Frequency Stability is inclusive of frequency shifts due to calibration, temperature, supply voltage, shock, vibration and load
Packaging
Tray or
8mm tape
4mm pitch
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.
Frequency in MHz
Supply Voltage (Vcc)
Optional Operating Temperature Range
E: - 40 to +85° C
V: 3.3 volts ± 10%
W: 2.5 volts ± 10%
Logic Levels
Logic “1” 90% of Vcc MIN; Logic “0” 10% of Vcc MAX
Input Current (Icc)
10 mA maximum
Stand-by Current
50 uA maximum
Rise and Fall Time (Tr & Tf)
5 ns maximum
.039 (1.0)
Pl tronics, Inc.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
.
CMOS
<
80
MHz
Page
12
-
19
For Best Performance,
Do NOT allow any traces other
than ground under oscillators
(Even in buried layers)
Portions of the part number that appear after the frequency may not be marked on part (C of C provided)
PRELIMINARY SPEC
1
23
4
Contact Factory for Developed Frequencies
NOTE: SM44xxTSV and SM44xxTV denote the same specs.
‘S’ means 45/55% symmetry which is the standard.
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