VOLTAGE CONTROLLED (VCXO)
Q-TECH
CORPORATION
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
Description
Q-Tech’s voltage-controlled crystal oscillators (VCXO)
consist of a varactor diode and associated circuitry such as a
bipolar transistor or logic IC amplifier, logic output buffers
and/or logic divider stages, and a round AT high-precision
quartz crystal built in a wide selection of Dual-In-Line (DIP)
or Surface -Mount (SMT) hermetically sealed packages.
Features
• Made in the USA
• ECCN: EAR99
• DFARS 252-225-7014 Compliant:
Electronic Component Exemption
• USML Registration # M17677
• Wide frequency range from 1kHz to 155.52MHz
• Wide operating temperature range -55ºC to +125ºC
• Choice of output logic options ( ACMOS, HCMOS,
LVHCMOS, TTL, Sine, and ECL outputs)
• Supply voltage -5.2Vdc & 5Vdc ±10%
• Hermetically sealed package
• Tight or custom symmetry available
• Wide pull range up to ±500ppm (optional)
• Special linearity (<5%, <10% optional)
• Positive or Negative Transfer function
• Bipolar control (±Vc)
• Fundamental designs
• Q-Tech does not use pure lead or pure tin in its
products
• RoHS compliant
Applications
•
•
•
•
•
Frequency synthesis
Clock recovery
Phase-lock loop (PLL) applications
Telecommunication
Applications requiring frequency modulation or
electronic control of the oscillator frequency
Q-Tech offers custom design VCXOs in SMT packages
(QT78, QT88) at 3.3 Vdc and 5.0Vdc up to 72MHz. Please
contact Q-Tech for details.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
1
VOLTAGE CONTROLLED (VCXO)
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
Q-TECH
CORPORATION
Electrical Characteristics
Parameters
Output freq. range (Fo)
(See note 1)
Supply voltage (Vcc)
(See note 2)
Freq. stability (∆F/∆T)
Operating temp. (Topr)
Storage temp. (Tsto)
ACMOS
375kHz — 70MHz
QT6, 18, 41, 42
QT50
QT57
QT24
QT62
QT75
375kHz — 70MHz
HCMOS
1kHz — 70MHz
375kHz — 27MHz
1kHz — 155.52MHz
1kHz — 70MHz
1MHz — 27MHz
15MHz — 70MHz
TTL
SINE
1MHz — 27MHz
N/A
1MHz — 155.52MHz
N/A
N/A
N/A
5.0Vdc ± 10%
25 mA max. Fo <
35 mA max. Fo ~
45 mA max. Fo ~
65 mA max. Fo ~
Operating supply current
(No Load)
Symmetry
(See note 3)
Rise and Fall times (Tr/Tf)
(with typical load)
See Option codes
See Option codes
-62ºC to + 125ºC
65mA max.
20MHz
20MHz to < 30MHz
30MHz to < 70MHz
70MHz to 155.52MHz
45/55% max. Fo < 12MHz
40/60% max. Fo~ 12MHz to 155.52MHz
6ns max. Fo < 30MHz
3ns max. Fo ~ 30MHz to 155.52MHz
15pF // 10kΩ
10TTL Fo < 20MHz
6TTL Fo ≥ 20 MHz
0V to 5Vdc
Output Load
Control Voltage Vc (See note 4)
Frequency pulling (See note 5)
Transfer function (See note 6)
Linearity (See note 7)
Modulation bandwidth
Input impedance
Output logic
Harmonics (See note 8)
Subharmonics (See note 8)
ACMOS
HCMOS
Notes: Custom designs are available with Q-Tech custom MCM part numbers.
Other frequencies and packages are available. Please contact for details.
Other supply voltages are available. Please contact for details.
Tighter symmetry is available other than 40/60% max.
Other Vc and bipolar control voltages are available. Please contact for details.
Wide frequency pulling is available up to ±500ppm min. APR is also available.
Q-TECH Corporation
-
10150 W. Jefferson Boulevard, Culver City 90232
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
50Ω
± 100ppm min.
Positive
± 10% max.
up to 10kHz
Sine, 0dBm min.
-20dBc max.
-30dBc max.
10Hz
-70dBc / Hz
100Hz
-95dBc / Hz
1kHz
-120dBc / Hz
10kHz
-135dBc / Hz
100kHz
-145dBc / Hz
10ms max.
Start-up time
1.
2.
3.
4.
5.
N/A
> 10kΩ
TTL
N/A
Phase noise (typ.)
(See note 9)
N/A
6.
7.
8.
9.
-
ECL
12MHz — 27MHz
N/A
12MHz — 155.52MHz
Please call
N/A
N/A
-5.2Vdc ± 5%
PECL
5.0Vdc ± 5% (PECL)
65 mA max. Fo < 50MHz
85 mA max. Fo ~ 50MHz to 155.52MHz
40 / 60% max.
3.5ns max. Fo < 125MHz
3.0ns max. Fo ~ 125MHz to 155.52MHz
50Ω into Vcc -2V
0V to -5.2Vdc
0V to 5Vdc
10K / 10KHECL
PECL
N/A
Negative transfer function is available.
Better linearity than ±10% is available.
Harmonics better than -20dBc and subharmonics better than -30dBc are available.
Phase noise screening test is available.
Tel: 310-836-7900 - Fax: 310-836-2157
-
www.q-tech .co m
2
VOLTAGE CONTROLLED (VCXO)
Q-TECH
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
CORPORATION
Package Configuration Versus Pin Connections
QT41V
QT6V
Q-TECH
P/N
FREQ.
D/C S/N
QT42V
Q-TECH
MCM
FREQ.
D/C S/N
QT50V
Q-TECH
MCM
FREQ.
D/C S/N
Q-TECH
MCM
FREQ.
D/C S/N
.200
MAX.
(5.08)
.200
MAX.
(5.08)
.200 MAX.
(5.08)
.200 MAX.
(5.08)
.200
MIN.
(5.08)
.200
MIN.
(5.08)
.200
MIN.
(5.08)
.250
MIN.
(6.35)
.018
.018
(.457)
(.457)
.600
.600
(15.24)
(15.24)
.800
.880
MAX.
(22.35)
(20.32)
.018
(.457)
.020
.600
(.508)
7
.505 MAX.
.300 (12.83)
.800
MAX.
(20.32)
1
ø .060
(ø 1.52)
8
.300
Vcc
GND
Out
Vc
14
7
8
1
14
Vcc
GND
Out
Vc
.100
(2.54)
.300
(7.62)
8
8
Vcc
GND
Out
Vc
8
ø .080
(ø 2.03)
Q-TECH
P/N
FREQ.
D/C S/N
12
1 44
.060/.045
.010
(1.52/1.14)
(.254)
.700
(17.78)
.980
(24.89)
.625
SQ.
(15.88)
.050
(1.27)
MAX.
10
8
4
5
1
40
4
1
34
2
.085
MAX.
(2.16)
.250 MIN.
(6.35)
.018
(0.457)
3
.350
+010
-.005
(8.89
+.25
)
-.127
.500
SQ.
(12.70
.050
(1.27)
.050
(1.27)
11
3
2
34
12
.650
SQ.
(16.51)
1
8
1
.805 MAX.
.600
(20.45)
Vcc
GND
Out
Vc
9
Vcc
GND
Out
Vc
16
8
9
1
.200
(5.08)
.050
(1.27)
4
Vcc
GND
Out
Vc
4
2
3
1
20
.015
(.381)
(15.24)
16
+.25
)
-.127
(2.92)
(
1
+ 010
.550 - .005
(13.97
.115 MAX
.025
(.635)
(
SQ.
QT75V
Q-TECH
P/N
FREQ.
D/C S/N
.120
MAX.
(3.05)
5
Vcc
GND
Out
Vc
QT62V
6
.200
MAX.
(5.08)
.505 SQ. MAX.
(12.83)
.300
(7.62)
5
14
7
8
1
QT24V
Q-TECH
P/N
FREQ.
D/C S/N
4
.505
MAX.
(12.83)
(7.62)
14
7
8
1
QT57V
1
4
.505
MAX.
(12.83)
7
(7.62)
14
.020
(.508)
(15.24)
MAX.
1
1
.018
(.457)
13
10
11
12
6
Vcc
GND
Out
Vc
1 44
40
6, 12
34, 40
42
41
.050
(1.27)
.100
(2.54)
Dimensions are in inches (mm)
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
3
VOLTAGE CONTROLLED (VCXO)
Q-TECH
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
CORPORATION
Ordering Information
Model #
AC
HC
T
S
E
EH
PE
=
=
=
=
=
=
=
QTXXV — X — XX — M — 20.000MHz
ACMOS +5V
HCMOS +5V
TTL +5V
Sine +5V
10KECL -5.2V
10KHECL -5.2V
PECL +5V
1
4
5
6
9
10
11
12
=
=
=
=
=
=
=
=
Packaging Options
•
•
•
•
Output frequency
Screened to
MIL-PRF-55310,level B
(Left blank if no screening)
±
±
±
±
±
±
±
±
100ppm
50ppm
25ppm
50ppm
50ppm
100ppm
50ppm
100ppm
Standard packaging in black foam (DIP)
Standard packaging in a locked anti-static cardboard (QT24)
Standard packaging anti-static plastic tube (QT75)
Optional Tape and Reel
at
at
at
at
at
at
at
at
0ºC
0ºC
-20ºC
-55ºC
-55ºC
-55ºC
-40ºC
-40ºC
to +70ºC
to +70ºC
to +70ºC
to +105ºC
to +125ºC
to +125ºC
to +85ºC
to +85ºC
Other Options Available For An Additional Charge
• Lead forming available on all packages. Please contact for
details.
• Solder Dip Sn/Pb 60/40%
• P. I. N. D. test
• Lead trimming
• J-leads attached (QT75)
Specifications subject to change without prior notice.
Key parameters of a VCXO:
Nominal Frequency (Fo): Output frequency at center control voltage Vc.
Control Voltage: The available voltage range at the input of the VCXO to vary the frequency (i.e., 0 - 5V, ±4V, etc.).
Deviation (pull range): The change in the output frequency as a function of control voltage.
Transfer Function (sense): Direction of change in frequency as a function of control voltage.
Temperature Range: Operating temperature range.
Stability vs. Temperature: Percentage, or ppm, change of output frequency with respect to the temperature range at a constant
control voltage.
• Input Impedance: A measure of isolation between the VCXO internal frequency control network and the control voltage source.
• Linearity: The deviation from the best straight line slope of the frequency vs. control voltage plot.
• Modulation Bandwidth (rate): The maximum allowable rate of change of the control voltage.
•
•
•
•
•
•
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
4
VOLTAGE CONTROLLED (VCXO)
Q-TECH
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
CORPORATION
Frequency vs. Temperature Curve
QT6VHC-40MHz INTEGRAL LINEARITY AND PULLABILITY Vc=0V to 5Vdc
QT58VHC-32MHz PULLING AND INTEGRAL LINEARITY
40,008,000
40,006,000
5%
5%
4%
4%
3%
3%
300
250
150
40,000,000
0%
-1%
39,998,000
Integral Linearity, %
1%
Integral Linearity, %
Output Frequency, Hz
2%
40,002,000
2%
100
1%
50
0
0%
-50
-1%
Frequency Pulling, ppm
200
40,004,000
-100
-2%
-2%
-3%
-3%
-4%
-4%
-5%
-5%
-150
39,996,000
39,994,000
39,992,000
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
-200
-250
-300
0
5
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
2.5
SN1
SN2
SN3
SN4
SN1 integral linearity
SN2 integral linearity
SN3 integral linearity
100.2°C Integral Linearity
SN4 integral linearity
WIDE PULL VCXO QT957S - 16MHZ
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
25°C Integral Linearity
-54.9°C Integral Linearity
2 100.2°C centered
2 25°C centered
2 -54.9°C centered
WIDE PULL VCXO QT957S-16MHz FREQUENCY STABILITY VS. TEMPERATURE
600
50
500
40
400
30
300
Frequency Deviation, PPM
Frequency Deviation, PPM
2.75
Vc (V)
Vc (V)
200
100
0
-100
-200
-300
20
10
0
-10
-20
-30
-400
-40
-500
-50
-600
-45 -40 -35 -30 -25 -20 -15 -10
0
0.25 0.5 0.75
1
1.25 1.5 1.75
2
2.25 2.5 2.75
3
3.25 3.5 3.75
4
4.25 4.5 4.75
5
-5
0
5
10
15
3737
3739
3722
3723
3724
3725
3727
25
30
35
40
45
50
55
60
65
70
75
80
Temp (°C)
Applied Vc, volts
3721
20
5.25 5.5 5.75
3728
3731
3732
3734
3735
3736
3738
QT75VHC-54.04MHz FREQUENCY PULLING AND LINEARITY VC=0V TO 5Vdc
8%
400
6%
300
Integral Linearity, %
200
2%
100
0%
0
-2%
Frequency Pulling, PPM
4%
-100
-4%
-200
-6%
-8%
-300
0
0.25
0.5
0.75
1
1.25
Output Waveform (Typical)
TH
SYMMETRY =
1.5
1.75
2
2.25
2.5
2.75
3
3.25
3.5
3.75
4
4.25
4.75
5
Test Circuit
x 100%
Typical test circuit for VCXO CMOS logic
T
Tr
4.5
VC (V)
Tf
+ mA
Vdd
VOH
0.9xVdd
0.5xVdd
+
Power
Supply
-
Vcc Out
Output
DUT
+
Vdc
-
0.1µF
or
Vc
0.01µF
GND
15pF
(*)
10k
Ground
0.1xVdd
VOL
GND
TH
Vc
(*) CL includes probe and jig capacitance
T
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
5
85
90
VOLTAGE CONTROLLED (VCXO)
Q-TECH
CRYSTAL CLOCK OSCILLATORS
-5.2Vdc & 5.0Vdc - 1kHz to 155.52MHz
CORPORATION
Phase Noise and Phase Jitter Integration
QT25VT, 29.5MHz
QT6VHC10M, 16MHz
Environmental Specifications
QT50VAC, 31.9488MHz
Period Jitter
QT25VT, 29.5MHz
Q-Tech Standard Screening/QCI (MIL-PRF55310) is available for all of our VCXO packages. Q-Tech can also customize screening
and test procedures to meet your specific requirements. The units are designed and processed to exceed the following test conditions:
Environmental Test
Temperature cycling
Constant acceleration
Seal Fine Leak
Burn-in
Aging
Vibration sinusoidal
Shock, non operating
Thermal shock, non operating
Ambient pressure, non operating
Resistance to solder heat
Moisture resistance
Terminal strength
Resistance to solvents
Solderability
Test Conditions
MIL-STD-883, Method 1010, Cond. B
MIL-STD-883, Method 2001, Cond. A, Y1
MIL-STD-883, Method 1014, Cond. A
160 hours, 125°C with load
30 days, 70°C, ± 1.5ppm max
MIL-STD-202, Method 204, Cond. D
MIL-STD-202, Method 213, Cond. I
MIL-STD-202, Method 107, Cond. B
MIL-STD-202, 105, Cond. C, 5 minutes dwell time minimum
MIL-STD-202, Method 210, Cond. B or C
MIL-STD-202, Method 106
MIL-STD-202, Method 211, Cond. C
MIL-STD-202, Method 215
MIL-STD-202, Method 208
Please contact Q-Tech for higher shock requirements
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
Voltage Controlled (VCXO) (Revision B, July 2008) (ECO# 9386)
6