EURO
QUARTZ
Stable and clean 100KH differential signals
Uses Inverted MESA, fundamental-mode crystals
No PLL, multiplier or overtone-mode crystals used
Very low jitter <1ps
Miniature 6 pad package, RoHS Compliant
GP576 Series PECL VCXOs
7 x 5 x 2mm SMD Low Jitter PECL VCXO
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DESCRIPTION
GP
series VCXOs use fundamental mode (inverted mesa) crystal to
achieve wide frequency deviation with stable and clean signals. No
multiplier, overtone crystal or phase lock loop technique is used. As a
result Jitter is as low as for instance 1ps for the 155.520 MHz for
SONET/SDH application. Additionally, the inherent advantages of
differential PECL ECL signal transmission provide improved noise
immunity making the system less susceptible to ground noise.
SPECIFICATION
Frequency Range:
Output Waveform:
Standard Frequencies:
OUTLINE & DIMENSIONS
Output Load:
Frequency Stability:
Input Voltage (Vcc)
LVPECL:
PECL:
Supply Voltage
Dependant Parameters
Initial Frequency Accuracy
To tune to nominal
frequency with:
Output Voltage HIGH ‘1’:
Output Voltage LOW ‘0’:
Rise/Fall Time
Current Consumption:
Duty Cycle:
Integrated Jitter RMS:
12kHz to 20MHz:
SSB Phase Noise
19.440MHz to 250MHz
PECL 100K square wave
38.880, 44.736, 50.0, 77.76,
100.0, 106.25, 125.0, 155.52,
166.6286, 200.0, 207.360 and
212.50MHz
(Partial List)
15pF
see table
+3.3 VDC ±5%
+5.0 VDC ±5%
Supply Voltage
+3.3 Volts ±5%
+5.0 Volts ±5%
Vc=+1.65V±0.2V
2.27V minimum
1.68V maximum
5ns maximum
Vc=+2.5V±0.2V
4.5V minimum
3.35V maximum
7ns maximum
FREQUENCY STABILITY
Stability Code Stability ±ppm Temp. Range
A
25
0°~+70°C
B
50
0°~+70°C
C
100
0°~+70°C
D
25
-40°~+85°C
E
50
-40°~+85°C
F
100
-40°~+85°C
If non-standard frequency stability is required
Use ‘I’ followed by stability, i.e. I20 for ±20ppm
PART NUMBERING
Example:
Supply Voltage
3 = +3.3V
5 = +5.0V
Series Designator
Stability over temperature range
(See table)
Pullability in ±ppm
Pullability determinator
N = minimum
M = maximum
T = Typical
Frequency in MHz
80mA max.
(Frequency dependant)
50%±2% typical, 50%±5% max.
0.4ps typical, 0.5ps max.
(Example at 155.250MHz)
10Hz offset:
100Hz offset:
1kHz offset:
10kHz offset:
100kHz offset:
1MHz offset:
-50dBc
-80dBc
-110dBc
-135dBc
-145dBc
-145dBc
Frequency Deviation Range
Supply = 3.3 V:
Supply = 5.0 V:
±80ppm
±100ppm
(Wider pull range available)
Linearity:
±10% max.
Slope Polarity:
Monotonic and Positive
(An increase of control voltage increases output freq.)
Start-up Time:
10ms max.
Input Impedance:
>10kOhm
3dB Modulation Bandwidth:
10Hz minimum
Ageing:
±2ppm year max at 25°C
Storage Temperature:
-55° to +100°C
Tristate function (Pad 2):
PECL output is disabled and Complimentary output
remains high when tristate pad is HIGH. Both outputs
are HIGH when Tristate pin is LOW.
3G576B-80N-27.000
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 Email: info@euroquartz.co.uk www.euroquartz.co.uk
