19013 36th Ave. West
Suite H
Lynnwood, WA 98036, USA
ST2245 Series
Half Size (8 Pin DIP) Metal Clock Oscillator
True TTL Output without Enable/Disable
Lower EMI Due to Lower Ringing Noise (Overshoot/Undershoot)
Available in Thru-Hole or Surface Mount Configuration
Standard Specifications
Overall Frequency Stability
Operating Temperature Range
Supply Voltage (Vcc)
Symmetry (Duty Cycle)
Logic Levels
Output Load
Ringing Noise
ST2245: ± 50 PPM, ST2244: ± 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 ± 10%
40/60 to 60/40% is standard, but 45/55% at Vcc = 1.4 volts is also available (see Waveform 1)
Logic “1”
2.4 volts MIN;
Logic “0”
0.4 volts MAX
Can drive up to 10 TTL loads + 15pF, see Test Circuit 4 (consult factory for
heavier
loads)
Depends on frequency and output load. See EMI application note
Supply Current
Icc (mA)
Typical
Maximum
Rise and Fall Time
Tr & Tf (nS)
Typical
Maximum
4.000 MHz
–
60.000 MHz
Frequency Range
(MHz)
4.000
8.000
16.000
22.000
– 7.999
– 15.999
– 21.999
– 60.000
23.0
24.0
24.0
27.0
28.0
28.0
28.0
32.0
4.0
3.0
2.5
2.0
5.0
4.0
3.5
3.0
Part Numbering Guide
ST22 45 E -- 60.0M - 30 - SMD
Packaging
Tube or on Pads,
SMD: Bulk
Model
Frequency Stability
45 = ± 50 PPM
44 = ± 25 PPM
Surface Mount Option
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)
Blank: Std Specs (0 to +70
°
C, 40/60% Symmetry)
E: Extended Operating Temperature Range (- 40 to +85
°
C)
P: 45/55% Symmetry at Vcc = 1.4 volts
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
.270 (6.87)
MAX
Surface Mount
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.
.236 (6.0)
MAX
.031 (0.8)
.300 (7.62)
PLE
.020
(.51)
.300 (7.62)
.492 (12.5) MAX
.492 (12.5) MAX
.300 (7.62)
OUT
5
8
Vcc
.492 (12.5) MAX
.492 (12.5) MAX
.354 (9.0)
5
8
8
1
5
4
4
GND
1
N.C.
4
1
.250 (6.35) MAX
Jan 2002
Pad (8X)
.136 x .035
(3.45) x (.89)
.200 (5.08)
Pl tronics, Inc.
(425) 776 -1880, Fax: (425) 776-2760, ple-sales@pletronics.com, www.pletronics.com
22
Embedded System
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