Upper dimensions
in inches - lower
dimensions in
millimeters. Unless
otherwise specified,
tolerances are
.005Ó (.127mm.).
Detailed mechanical
drawings available
by request.
Q-TECH
P/N
FREQ.
.200 Max.
5.08
.200 Min.
5.08
.018
.457
.600
15.24
.880 Max.
22.35
.100
2.54
1
14
7
8
V O LTA G E C O N T R O L L E D
QT 6V
VCXO
QT 41V
.505 Max.
.300 12.83
7.62
Dual In-Line
Crystal
Oscillators
Q-TECH Voltage Controlled Crystal Oscillators can be frequency
shifted or controlled by changing the voltage at the control point
of the device. VCXOs are used for frequency synthesis, clock
recovery, and other phase-lock loop applications.
The following parameters need to be determined when
specifying a VCXO:
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 due
to control voltage change.
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 in 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 band width (rate):
The maximum rate of change of
the control voltage.
Please contact us
for variations
on these
specifications
QT 6V
Q - Te c h
Corporation
QT 50V
(310) 836-7900
fax
(310) 836-2157
If the VCXO is intended for phase-lock applications, the required deviation of
the VCXO can be determined by the following equation (see
fig. below):
D
EVIATION
> (VCXO
STABILITY
) + (S
TABILITY OF THE SOURCE
)
In this equation, source stability is
a system parameter while VCXO
Phase/Freq.
Source
VCXO
LPF
stability would be a function of
Detector
temperature, time, load, and
power supply variations.
PLL simplified model
Output
O
sample part number
(
ORDERING
INFORMATION
MODEL#
)
QT6VHC9M - 20.000 MHz
QT6V
HC
9
M
-
20.000 MHz
FREQUENCY
Q T
6 V,
Q T
4 1 V,
Q T
5 0 V,
Q T
5 7 V *
OUTPUT LOGIC OPTIONS
T=TTL
HC=
High Speed CMOS
AC=Advanced
CMOS
E
=10K ECL
EH
=10KH ECL
PE
=+5V ECL
STABILITY
SCREENING
Please refer to
stability table on
opposite page.
*
**
Designate
M
for Class B
M55310 screening. (Optional)
For more information, see page 37.
From:
1 KHz
to
200 MHz **
See Standard
Electrical
Specifications
on page 21.
Q-Tech
20
QT57 offers a broader range of capabilities. Consult the factory for details.
Frequency range for QT50 is 5.000 MHz to 60.000 MHz for TTL, HC/ACMOS.
.200
Max.
5.08
.200
5.08 Max.
.200
5.08 Min.
.018
.457
.600
15.24
.880
Max.
20.32
.020
.508
.018
.457
.060
1.52
.200
5.08 Max.
.250
Min.
6.35
.100
2.54
1
1
4
.505 Sq. Max.
12.83
16
8
5
9
8
.805
.600 20.45
15.24
Max.
1
14
7
8
.505
.300 12.83
7.62
.300 Sq.
7.62
QT 41V
QT 50V
QT 57V
PIN CONNECTIONS
QT#
QT 6V
QT 41V
QT 50V
QT 57V
GND
7
7
4
8
OUT
8
8
5
9
SUPPLY V
14
14
8
16
FEATURES
CONTROL V
1
1
1
1
FREQUENCY STABILITY vs TEMPERATURE*
CODE
4
5
6
9
10
11
±%
.005
.0025
.005
.005
.01
.005
±PPM
50
25
50
50
100
50
TEMP
0ûC to +70ûC
-20ûC to +70ûC
-55ûC to +105ûC
-55ûC to +125ûC
-55ûC to +125ûC
-40ûC to +85ûC
¥ Wide frequency range.
¥ Hermetically sealed packages.
¥ Wide pull range (optional).
¥ Control voltage and polarity of choices.
¥ Special linearity (optional).
¥ Class B M55310 Screening is
available upon request.
12
.01
100
-40ûC to +85ûC
*All units operate from -55ûC to + 125ûC. Tolerance is not
specified outside the temperature ranges shown above.
For frequency stability vs. temperature options not listed
herein, request a custom part number.
The Q-TECH double DIP VCXO, QT57V,
offers a broader range of capabilities.
Consult the factory for details.
ELECTRICAL
STA N D A R D
OPTI ONA L
SPECIFICATIONS
Frequency Range:
QT41V, QT6V, QT57: up to 200 MHz
QT50V: 5 MHz to 60 MHz
Output: TTL, HC/ACMOS, ECL
Supply Voltage: 5V ±10% (-5.2 V for 10K ECL)
(-4.5 V for 100K ECL)
Deviation: ±100 PPM (min)
Control Voltage (Vc): 0 to 5 Volts
Transfer Function: Positive
Modulation BW: Up to 10 KHz
Linearity: 10%
Input Impedance: >50K ohm
Temperature Range: See frequency stability table
Stability vs. Temp.: See frequency stability table
Stability vs. Supply and Load changes: ± 4 ppm
Package: 14 pin/4 pin DIP/Half DIP/Double DIP
Q-TECH Corporation has developed various types of
VCXOs, VCOs, and complete phase-locked loops in
hermetically sealed as well as solder sealed packages.
Sine wave output:
10K or 100K ECL (± supply)
Frequency: >200 MHz (not available in QT50)
Deviation: >±100 ppm (Vc=0 - 5V)
Modulation BW: 0 to100 KHz DC
Transfer Function: Negative
Linearity: <10%
Control Voltage: Bipolar
Supply Voltage: 3 to 15V
Package: 16 and 18 pin DIP,
Flat Pack, & LCC
The Non-Hybrid versions of these VCXOs are
available in industry standard solder sealed packages.
21
Q-Tech
09-21-2000
SPECIAL PRODUCTS
.018
.457 .700
17.78
.980
Max.
24.89
.250
Min.
6.35
