Pl tronics, Inc.
.
19013 36th Ave. W, Suite H Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
SM8845C Series
4 Pad 9.1 x 7.1mm Leadless Surface Mount Ceramic Clock Oscillator
CMOS with Enable/ Disable
Recommended for Non-Std Specs and Frequencies
–
1.000 MHz 80.000 MHz
Standard Specifications
Overall Frequency Stability
SM8845C: ± 50 PPM, SM8844C: ± 25 PPM, SM8820C: ± 20 PPM over Operating Temp. Range
-
°
Operating Temperature Range 0 to +70 C is standard, but can be extended to 40 to +85°C for certain frequencies
Supply Voltage (Vcc)
Symmetry (Duty Cycle)
Logic Levels
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
Output Load
Enable/Disable Option (E/D)
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”.
Rise and Fall Time
Frequency Range
(MHz)
Max. Supply Current
Icc (mA) w/ 15pF load
Tr & Tf (nS) w/ 15pF load
Typical
4.0
Maximum
5.0
3.3V
TBD
5.0V
10
–
1.000 25.000
–
25.001 50.000
TBD
TBD
20
25
3.0
3.5
4.0
4.5
–
50.001 80.000
Part Numbering Guide
Portions of the part number that appear after the frequency may not be marked on part (C of C provided)
SM88 45 C Y -- 50.0M - 30 - XXX (Internal Code or blank)
Packaging
Tray or
24mm tape
12mm pitch
Non-Std Output Load
Model
Blank = 15 pF max, 30 = 30 pF max, 50 = 50 pF max
Frequency Stability
45 = ± 50 PPM
Frequency in MHz
Special Specifications (choose all that apply)
44 = ± 25 PPM
20 = ± 20 PPM
°
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
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.
For Best Performance,
.157 (4.0)
Do NOT allow any traces other
than ground under oscillators
(Even in buried layers)
0.01 F
m
2
3
bypass
3
2
1
capacitor
GND
OUT
.130 (3.3)
.07 (1.8)
1
4
4
Vcc
E/D
.08 (2.0)
.280 (7.1 ± .1)
Jan 2003
.075 (1.9) MAX
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
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Pl tronics, Inc.