SURFACE MOUNT
TCXOs
CFPT-9000 Series
ISSUE 10 ; 3 FEBRUARY 2006
Recommended for New Designs
Delivery Options
■Please contact our sales office for current leadtimes
Description
■A series of surface mountable 7.0
×
5.0mm temperature
compensated voltage controlled crystal oscillators
(TCVCXOs) for medium to high volume applications
where small size and high performance are pre-
requisites. This oscillator uses C-MAC’s latest custom
ASIC "Pluto", a single chip oscillator and analogue
compensation circuit, capable of sub 1 ppm
performance over an extended temperature range. Its
ability to function down to a supply voltage of 2.4V and
low power consumption make it particularly suitable for
mobile applications
RoHS compliance
■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
(see Lead-free Reflow soldering profile) and Tin / Lead
solders (see Tin / Lead Reflow soldering profile).
Standard Frequencies
■3.2, 5.0, 6.4, 8.192, 9.6, 12.688375, 10.0, 12.8, 13.0, 14.4,
14.85, 16.384, 16.367, 16.8, 19.2, 19.44, 19.8, 20.0,
24.5535, 32.768, 38.88, 40.0MHz
Output Waveform
■Square HCMOS 15pF load
■Square ACMOS 50pF max. load
(available on request, contact sales office)
■Sinewave 10kΩ// 10pF, AC-coupled
■Clipped sinewave 10kΩ// 10pF, AC-coupled
Supply Voltage
■Operating range 2.4 to 6.0V, see table
Current Consumption
■HCMOS Typically
≈
1+Frequency(MHz)*Supply(V)*{Load(pF)+15}*10-3 mA
e. g. 20MHz, 5V, 15pF
≈
4mA
■Sinewave, < 8mA
■Clipped Sinewave Typically ≈
1+Frequency(MHz)*1.2*{Load(pF)+30}*10-3mA
Package Outline
■7.0 x 5.0 x 2.0mm SMD Ceramic Carrier
Ageing
■±1ppm maximum in first year, frequency < 20MHz
■±2ppm maximum in first year, frequency > 20MHz
■±3ppm maximum for 10 years (including the first year),
frequency < 20MHz
■±5ppm maximum for 10 years (includng the first year),
frequency > 20MHz
■±1ppm maximum after reflow
Frequency Stability
■Temperature: see table
■Typical Supply Voltage Variation ±10% < ±0.2 ppm*
■Typical Load Coefficient 15pF ±5pF < ±0.2 ppm*
*Dependent on frequency and output type
Frequency Adjustment
■Three options with external Voltage Control applied to
pad 10:
A - Ageing adjustment: > ±5ppm, frequency < 20MHz
(Standard Option)
>±7ppm, frequency > 20MHz
B - No frequency adjustment initial calibration @ 25°C
<±1.0 ppm
C - High Pulling ±10ppm to ±50ppm can be available
depending on frequency and stability options.
Please consult our sales office
■Linearity < 1%
■Slope Positive
■Input resistance > 100kΩ
■Modulation bandwidth > 2kHz
■Standard voltage control ranges:
Without reference voltage - Vs=5.0V 2.5V±1V
Without reference voltage - Vs=3.3V 1.65V±1V
With reference voltage - Vc=0V to Vref
Reference Voltage, Vref
■Optional reference voltage output on pad 1, suitable for
potentiometer supply or DAC reference.
1. No output (standard option)
2. 2.2V, for Min. Vs>2.4V
3. 2.7V, for Min. Vs>3.0V
4. 4.2V, for Min. Vs>4.5V
Maximum load current (mA) = Vref/10
For manual frequency adjustment connect an external
50kΩpotentiometer between pad 1 (Reference Voltage)
and pad 4 (GND) with wiper connected to pad 10 (Voltage
Control). Please specify reference voltage as part of the
ordering code
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Website: www.cmac.com
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990