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CO-255/256 Series Temperature Compensated Crystal Oscillators (TCXO)


CO-255/256 Series
Features:
  • Frequencies to 630 MHz
  • High stability to ±1 x 10-7
Specifications
  CO-255 SERIES CO-256 SERIES
FREQUENCY 140.1 - 420 MHz 420.1 - 630 MHz
STABILITY     Temperature
(Temp Range A)  +15°C to +35°C
CO-255A57: ±5 x 10-7
CO-255A17: ±1 x 10-7
CO-256A57: ±5 x 10-7
CO-256A17: ±1 x 10-7
(Temp Range B)      0°C to +50°C CO-255B16: ±1 x 10-6
CO-255B57: ±5 x 10-7
CO-255B27: ±2 x 10-7
CO-256B16: ±1 x 10-6
CO-256B57: ±5 x 10-7
CO-256B27: ±2 x 10-7
(Temp Range C)      0°C to +70°C CO-255C36: ±3 x 10-6
CO-255C16: ±1 x 10-6
CO-255C37: ±3 x 10-7
CO-256C36: ±3 x 10-6
CO-256C16: ±1 x 10-6
CO-256C37: ±3 x 10-7
(Temp Range D)   -20°C to +70°C CO-255D56: ±5 x 10-6
CO-255D16: ±1 x 10-6
CO-255D57: ±5 x 10-7
CO-256D56: ±5 x 10-6
CO-256D16: ±1 x 10-6
CO-256D57: ±5 x 10-7
(Temp Range E)   -40°C to +75°C CO-255E56: ±5 x 10-6
CO-255E26: ±2 x 10-6
CO-255E16: ±1 x 10-6
CO-256E56: ±5 x 10-6
CO-256E26: ±2 x 10-6
CO-256E16: ±1 x 10-6
(Temp Range F)   -55°C to +85°C CO-255F56: ±5 x 10-6
CO-255F26: ±2 x 10-6
CO-255F16: ±1 x 10-6
CO-256F56: ±5 x 10-6
CO-256F26: ±2 x 10-6
CO-256F16: ±1 x 10-6
(Temp Range G) -55°C to +105°C CO-255G56: ±5 x 10-6 CO-256G56: ±5 x 10-6
(Temp Range H) -55°C to +125°C CO-255H15: ±1 x 10-5 CO-256H15: ±1 x 10-5
Aging Rate 1 x 10-6/year
Short Term (Allan Variance) 1 x 10-9/second under constant conditions
Frequency vs Supply 2 x 10-8 per percent in supply
OUTPUT / SUPPLY (±5%)
Output Level

Standard:   >0.5 Vrms/50 (+7 dBm)
Option "R":   >1.0 Vrms/50 (+13 dBm)
*Option "M":   100K ECL
 
**Supply ±5%

Standard:   +15 Vdc
Option "R":   +15 Vdc
*Option "M":   +15 Vdc and -5.2 Vdc
(-4.5 Vdc optional)

*   Only available in CO - 255
**   Any supply in 12 - 24 Vdc range optional
Current
Sine:   <50mA
ECL:   <30mA for oscillator;
  also <60mA at -5.2V
<60 mA
Harmonics and
Sub-Harmonics (sine output)
Harmonics and sub-harmonics are -20 dBc.
Improved harmonic and subharmonic attenuation optional.
FREQUENCY   Mechanical
ADJUSTMENT
Range sufficient to compensate for 5 to 10 years
of crystal aging; settable to <1 x 10 - 7
Option "V": VCXO control permits remote frequency
adjustment of phase locking.
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Dimension in inches
 
Pinouts
1
2
3
4
5
Supply (+)
Case
N/C
0V, Case
Case
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Dimension in inches
 
Pinouts
1
2
3
4
5
Supply (+)
Case
N/C
0V, Case
Case
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