VOLTAGE-CONTROLLED CRYSTAL OSCILLATORS -PECL OUTPUT
GP624 PECL VCXO
6 Pin SMD Package
FEATURES
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Stable and clean 100K compatible PECL square wave
Uses inverted mesa, fundamental mode crystals
No PLL, multiplier or overtone-mode crystals used
Very low jitter <1ps for 155.520MHz
Standard 14 pin DIL, 6 pin package formed for SMD
LOW JITTER VERSION
OUTLINES & DIMENSIONS
GENERAL SPECIFICATION
Output Waveform:
Frequency Range:
Standard Frequencies:
PECL 100K square wave
Fundamental mode crystal
19.440MHz to 250MHz
38.880, 44.736, 50.0, 77.76,
100.0, 106.25, 125.0, 155.52,
166.6286, 200.0, 207.360 and
212.500MHz (partial list)
See table
Output Voltage
HIGH
2.25V min.
3.95V min.
4.05V typ.
4.15V max.
LOW
1.65V max.
3.15V min.
3.25V typ.
3.35V max.
Frequency Stability:
Input/Output Voltages
Input Cont. V Control Voltage
Range
V±5% Centr.
+3.3
+5.0
+1.65
+2.5
+0.3V to +3.0V
+0.5V to +4.5V
CURRENT CONSUMPTION*
Current Consumption (mA)
155.520MHz
+3.3
+5.0
58
85
77.760MHz
54
73
Current Consumption:
Load:
Rise/Fall Times:
Duty Cycle:
Jitter:
SSB Phase noise:
See table
50W into Vcc-2V
or Thevenin equivalent*
1.5ns max (20%~80%Vcc)
50±2% typ., 50±5% max.
(both outputs)
See table
-50dBc @ 10Hz offset
-80dBc @ 100Hz offset
-110dBc @ 1kHz offset
-135dBc @ 10kHz offset
-145dBc @ 100kHz offset
-145dBc @ 1MHz offset
* Measured with terminating resistor
JITTER (Example)
Jitter at 155.520MHz -5.0Volts
pico seconds RMS max.
1Hz ~ 1MHz
10Hz ~ 1MHz
100Hz ~ 1MHz
12kHz ~ 20MHz
10Hz ~ 20MHz
20
1.8
0.2
1.0
5.0
Frequency Deviation Range
Supply= +3.3 V:
Supply= +5.0:
Linearity:
Slope Polarity:
(Transfer function)
±80ppm (wider range available)
±100ppm (wider range available)
±10% max.
Monotonic and positive. Increasing
control voltage increases output
Frequency. (Increases when
V.Cont. approaches 0 Volts
Start-up Time:
10ms max.
Input Impedance:
>10kW
3dB Modulation Bandwidth:
10kHz minimum
Ageing:
±2ppm/year max.
Storage Temperature:
-55° to +100°C
Tri-state Option:
PECL output is disabled and Complimentary
output remains high when Tristate pin is
HIGH. Both outputs are high when Tristate
pin is LOW.
* Terminating resistor required on output.
MODEL OPTIONS
Pt. No.
Suffix
-3N
-3T
Pin 1
Voltage
Control
Voltage
Control
Pin 3
N/C
Tristate
Pin 7
Ground
Ground
Pin 8
O/P
O/P
Pin 12
Comp.
O/P
Comp.
O/P
Pin 14
Supply
Voltage
Supply
Voltage
ORDER CODE
Supply
Voltage
GP624
Stability Code
(A to F)
Pull
Nominal
Range Frequency
Options
FREQUENCY STABILITY
Stability
(ppm)
±25
±50
±100
Temperature Range Order Code
0°~+70°C
A
B
C
-40°~+85°C
D
E
F
‘3’ for +3.3V Package Stability Code (±ppm)
Nominal
‘5’ for +5.0V Style
‘N’ =min. Frequency
A to F or
‘M’ =max.
Cxx or Ixx
‘T’= typical
EXAMPLE:
Options
(See table
above)
5GP624-A-80N-155.520-3T
This describes GP624 package with complimentary PECL output, +5.0
Volt supply, ±25ppm over 0° to +70°C, ±80ppm minimum pull range
with frequency of 155.250MHz and Tristate function on Pin 3.
Note: For non-standard frequency stability for commercial temperature
range use the Code ’C’ followed by the stability, example ‘C20’ for
±20ppm over 0° to +70°C. For industrial temperature range use ‘I’
and the stability, example ‘I20’ for ±20ppm over -40° to +85°C.
EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE
Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk
Analog electronics
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