CFPO-20,-21,-22,-23 TC-OCXO
ISSUE 2; 20 APRIL 2006
Frequency Stability
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Temperature: see table
Supply Voltage Variation, 5ꢀ 0.1ppm typ.
Load Coefficient, 15pF 5pf (HCMOS) or 10kΩ // 10pF
10ꢀ (clipped sinewave) 0.1ppm typ.
Preliminary Specification
Recommended for new designs
Frequency Adjustment, three options
Delivery Options
A
Ageing adjustment by means of external Voltage Control
applied to pad 1 (standard option)
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Please contact our sales office for current leadtimes
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Range (frequency < 20MHz) > 5ppm
Range (frequency > 20MHz) > 7ppm
Description
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A series of high stability crystal oscillators, using a
hybrid combination of oven control and temperature
compensation capable of sub 0.05ppm stability. By
using a loosely controlled miniature oven that is
thermally isolated from the ambient the frequency
stability of a crystal oscillator is enhanced. Stability is
further improved by compensating the residual
frequency error with C-MAC’s proprietary ASIC “Pluto”,
a single chip oscillator with analogue compensation
circuit. The combination of these two functions result in
an oscillator with the best stability / power consumption
ratio and fast warm-up, making it particularly suitable
for battery powered applications
Linearity
Slope
Input Resistance
Modulation Bandwidth
< 0.5ꢀ
Positive
> 100kΩ
> 2kHz
Standard control voltage range 1.5V 1V
B
C
Ageing adjustment by means of an external 100kΩ
potentiometer connected as a variable resistor from
pad 1 to ground.
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Range (frequency < 20MHz)
Range (frequency > 20MHz)
>
>
5ppm
7ppm
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No frequency adjustment
Initial calibration
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<
0.5ppm
Standard Frequencies
Storage Temperature Range
-55 to 125°C
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HCMOS only: 5, 6.4, 8, 8.192MHz
HCMOS & Clipped Sinewave 10.0, 12.8, 16.0, 16.384
and 20.0MHz
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Environmental Specification
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Other frequencies in the range 1.25 to 33MHz may be
available upon request
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Vibration: IEC 60068-2-6, test Fc: 10-60Hz 0.75mm
2
displacement, 60-2000Hz 100m/s (10gn) acceleration,
4 hours in each of three mutually perpendicular axes at
1 octave per minute.
Waveform
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Standard
Square HCMOS 15pF load
Clipped Sinewave 10kΩ // 10pF, AC-coupled
Optional
Square ACMOS 50pF max. load
Sinewave 10kΩ // 10pF, DC-coupled
2
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Mechanical Shock: IEC 60068-2-27, test Ea; 1000m/s
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(100gn) acceleration for 6ms duration, Half sine pulse,
3 shocks in each direction along three mutually
perpendicular axes (18 shocks total)
Supply Voltage
Operating range 3.3V or 5.0V, see table.
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Parts with the suffix “LF” on the ordering code and part
number are fully compliant with the European Union
directive 2002/95/EC on the restriction of the use of
certain hazardous substances in electrical and electronic
equipment. Note:The RoHS compliant parts are suitable
for assembly using both Lead-free solders and Lead/Tin
solders.
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Input Power
-20 to 70°C
< 1.0W
-40 to 85°C
< 1.0W
< 350mW
< 525mW
< 600mW
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Warm-up
Steady state @ 25°C
Steady state @ -20°C
Steady state @ -40°C
< 270mW
< 400mW
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Marking: Laser Marked
Warm-up time to reach 0ꢀ01ppm of final frequency
< 30 secs. (@25°C)
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Marking, includes
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CMAC
Ageing
Part number (Pxxxx)
Pad 1 / Static sensitivity
identifier (triangle)
Device date / location code
(YYWWL)
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1ppm maximum in first year, frequency < 20MHz
2ppm maximum in first year, frequency > 20MHz
3ppm maximum for 10 years, frequency < 20MHz
5ppm maximum for 10 years, frequency > 20MHz
1ppm maximum after reflow
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Package
Hermetically sealed, industry standard, DIL 14/4
leaded package
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Europe Tel: +44 (0)1460 270200
AmericasTel: +1 919 941 9333
Asia Tel: +86 755 8826 5991
Fax: +44 (0)1460 72578
Fax: +1 919 941 9371
Fax: +86 755 8826 5990
Website: www.cmac.com
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