Pl tronics, Inc.
.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
SM5545T Series
4 Pad 5x 3.2mm Leadless Surface Mount Ceramic Clock Oscillator
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)
SM5545T: ± 50 PPM, SM5544T:
±
25 PPM, SM5520T:
±
20 PPM over Operating Temp. 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 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”.
10 nS maximum
Max. Supply Current
Icc (mA) w/ 15pF load
3.3V
5.0V
2.500 MHz
–
125.000 MHz
Frequency Range
(MHz)
2.500
33.000
50.000
70.000
– 33.000
– 50.000
– 70.000
– 125.00
12
25
35
60
20
45
50
100
Part Numbering Guide
Portions of the part number that appear after the frequency may not be marked on part (C of C provided)
SM55 45 T Y - 50.0M - 30 - XXX
(Internal Code or blank)
Packaging
Tray or
16mm tape
8mm pitch
Model
Frequency Stability
45 = ± 50 PPM
44 = ± 25 PPM
20 = ± 20 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
.032 (0.8)
.100 (2.54)
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.
.047 (1.2)
GND
OUT
For Best Performance,
Do NOT allow any traces other
than ground under oscillators
(Even in buried layers)
.197 (5.0 ± .2)
2
3
3
2
PLE
.071 (1.8)
0.01
m
F
E/D
1
.047 (1.2)
MAX
4
Vcc
4
.059 (1.5)
1
.063 (1.6)
bypass capacitor
.126
(3.2 ± .15)
.039 (1.0)
Dec 2003
Pl tronics, Inc.
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
13
CMOS < 80 MHz
Page 12 - 19
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