CFSS-3 SPREAD SPECTRUM CLOCK OSCILLATORS
ISSUE 3; 1 NOVEMBER 2008 - RoHS 2002/95/EC
Outline (mm)
5.0±0.2
Pad Connections
1.Enable/Disable
2.GND
3.Output
4.+Vs
Package Outline
OSCILLATORS
Frequency Range
CLOCK
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12 to 168MHz
Tri-state CMOS
Drive Capability 15pF max
±50ppm (inclusive of tolerance, supply voltage a
nd
output
load variations over the operating temperature range)
–10 to 70°C
–40 to 85°C
1
4
2.6
2
3
1.1
Output Compatibility & Load
Solder Pad Layout
0.7
1.6
Frequency Stability (averaged frequency)
1.05±0.1
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5 x 3.2mm
3.2±0.2
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Description
Spread spectrum surface mount oscillators in a ceramic
package with a hermetically sealed metal lid
2.6
1.3
Operating Temperature Range
Test Circuit
1.0
1.6
Storage Temperature Range
Tri-state Operation
Logic ‘1’ to pad 1 (>80% Vs) enables oscillator output
Logic ‘0’ to pad 1 (<20% Vs) disables oscillator output, the
oscillator output goes to a high impedance state.
No connection to pad 1 enables oscillator outputs
Centre Spread ±0.5%, ±1%, ±2%
Down Spread –1%, –2%, –4%,
12MHz to <20MHz
200ps max
A
+Vs
Power
Supply
V
+Vs
Oscillator
3
4
2
1
0.1µF
Frequency
Counter
Oscilloscope
15pF *
Modulation Ratios
* Inclusive of jigging and equipment capacitance
Cycle to Cycle Jitter 1s
20MHz to 168MHz 100ps max
±5ppm max / year
Drop: natural drop, 3 times, from 100cm onto a hard
wooden plate (30mm thick)
Vibration: 10 to 55Hz, 1.5mm displacement (10Hz-36Hz),
4G (36Hz-55Hz) sweep time 1min/oct, duration 2hrs for
each X, Y & Z axes
Model Number + Frequency
Bulk or Tape and Reel
Frequency + Model Number + Modulation Ratio +
Frequency Stability Code
Example Output Spectrum
Ageing
Environmental
Marking Includes
Packaging
Minimum Order Information Required
IQD Frequency Products Ltd, Station Road, Crewkerne, Somerset TA18 8AR, United Kingdom
Tel: +44 (1460) 270200; Fax: +44 (1460) 72578;
Email: info@iqdfrequencyproducts.com Web: www.iqdfrequencyproducts.com
Electrical Specifications - maximum limiting values
Frequency Range
12.0 to < 28.0MHz
28.0 to < 80.0MHz
80.0 to 168.0MHz
Ordering Example
Frequency
Model No.
Modulation Ratio: M plus ratio required
Frequency Stability
Tape (mm)
Reel (mm)
±50ppm
3.3V ±5%
Frequency Stability
Supply Voltage Supply Current Rise Time (tr)
13mA
15mA
30mA
20.0MHz CFSS-3 M ±1%
B
5ns
5ns
40/60%
CFSS-3
Fall Time (tf)
Duty Cycle
Model Number
40°
Ø20.2±0.1
2.0
1.75
4.0
Ø1.5
0.3
Ø13±0.5
12.0
5.3
8.0
3.5
Ø1.5
1.5
2.2
12.4
IQD Frequency Products Ltd, Station Road, Crewkerne, Somerset TA18 8AR, United Kingdom
Tel: +44 (1460) 270200; Fax: +44 (1460) 72578;
Email: info@iqdfrequencyproducts.com Web: www.iqdfrequencyproducts.com
Ø180
Ø62
5.5
CLOCK
OSCILLATORS