QT2020 MCXO
Description
Q-TECH
CORPORATION
RADIATION TOLERANT MICROCOMPUTER COMPENSATED CRYSTAL OSCILLATOR
3.3Vdc - 5 to 100MHz, 32.768kHz and 1PPS
Q-Tech’s microcomputer compensated crystal oscillator,
MCXO, uses a high stability overtone SC-cut crystal with mi-
croprocessor controlled compensation. The self-temperature
sensing resonator, using a dual-mode oscillator, virtually
eliminates thermometry related errors. As a result, all basic
TCXO and OCXO limitations are overcome or significantly
reduced in the MCXO.
Applications
•
•
•
•
• Made in the USA - ECCN: EAR99
• Radiation Tolerant
• Temperature Stability: ±10ppb to ±30ppb over
temperature (see ordering information below)
• Maximum aging: ±1.5ppm over 20 years
• DC Power Input: 3.3Vdc, 90 milliwatts max
• Initialization: <5 seconds from power on to full
performance
• High reliability signal generator that provides Sine
wave or HCMOS output
• Designed to withstand radiation levels up to 50kRad
(total dose), high shock, and vibration
• Outputs: 5 to 100MHz, 32.768kHz and 1PPS. Other
frequency options available
• Capability to lock to GPS at 1PPS or 10MHz
• Environmental: Inherently rugged design capable of
full military screening
• Low Phase Noise and Jitter
• Small Form Factor
• G-Sensitivity 1PPB/G maximum
• Custom design available tailored to meet customer’s
needs
• Consult factory for additional or tighter specifications
• Q-Tech does not use pure lead or pure tin in its
products.
• DFARS 252-225-7014 Compliant:
Electronic Component Exemption
• Technology has 30 year heritage in high reliability
military applications
• Breadboard and Engineering models built to
requirements of Q-Tech document F1297, Definitions
for PCB Based Product Development Levels
Satellite terminals
Underwater monitors
GPS
Mobile equipment
Features
RAD hard OCXO performance with 90mW
maximum power consumption!
Ordering Information
(Sample part number)
Q T20 20 C B M - 10 . 0 0 0M H z
Q T 2 0 2 0 C B M - 10.000MHz
Logic:
C = CMOS
S = Sine Wave
Screening Option:
B = Breadboard Model
E = Engineering Model
Flight Model
M=
Per MIL-PRF-55310, Level S
Output Frequency
Frequency vs. Temperature Code:
B = ± 10ppb at
0ºC to
+70ºC
C = ± 30ppb at -40ºC to
+85ºC
D = ± 20ppb at -40ºC to
+85ºC
For Non-Standard requirements, contact Q-Tech Corporation at
Sales@Q-Tech.com
Standard Frequencies
10MHz, 20MHz, 30MHz, 40MHz,
50MHz, 60MHz and 80MHz
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
QPDS-0138 (Preliminary, June 2019)
1
QT2020 MCXO
Q-TECH
CORPORATION
RADIATION TOLERANT MICROCOMPUTER COMPENSATED CRYSTAL OSCILLATOR
3.3Vdc - 5 to 100MHz, 32.768kHz and 1PPS
Dimensions are in [mm] inch
Package Outline and Pin Connections
8.38
.33
A
Pin No.
2, 4, 6, 8, 10, 12,
14 - 18, 22 - 25,
27, 28, 31, 34, 35,
37
3, 7, 19, 21, 33
9, 11, 36
20
26
30
29
32
38
13
5
1
10MHz Synchronization
Reference Frequency/
N/C*
GND / CASE
Mode Select
1PPS Input
Function
5.08
.20
Pin 1
C
50.80
2.00
D
1.80
Frequency Output
Sync 1
Sync 2
Status
1PPS Output
Voltage Supply
Factory Use*
E
1.00
20.32
.80
*PINS MAY HAVE INTERNAL
CONNECTION. DO NOT
GROUND.
Package Material:
.10
38X
.018
• Material: Kovar
• Finish: 50 µinches gold over nickel
plate
• Weight: 50g typical
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
QPDS-0138 (Preliminary, June 2019)
2
QT2020 MCXO
Q-TECH
CORPORATION
Pin #20:
Frequency Output. Depends on specification part number, Frequency output can be HCMOS or Sine Wave. HCMOS output
has 10 kOhm in parallel with 15pF load. Sine Wave output has 50 Ohm load.
.
Pinout Description
RADIATION TOLERANT MICROCOMPUTER COMPENSATED CRYSTAL OSCILLATOR
3.3Vdc - 5 to 100MHz, 32.768kHz and 1PPS
QT2020C
QT2020S
Frequency Output range is 5MHz to 100MHz.
Pins #3, 7,
19, 21,
Case Ground. This pin provides negative voltage (0V) to the MCXO. It is connected to the oscillator case to reduce EMI.
33:
Pins #1, 13:
Reference Input. This input can be configured as Frequency Correction or Synchronization 10MHz or 1PPS. The
configuration is one time programming at the factory according to customer request. In case of Synchronization option,
MCXO output will be locked to external signal as soon as it is applied to the input. With no signal applied, the MCXO
maintains specified stability over temperature and time. In case of Frequency Correction setup, the MCXO performs one
time routine to adjust frequency to reference signal. When signal is provided to the pin, the MCXO starts aging correction
routine and synchronizes both frequency and timing mode outputs to the reference signal. The routine takes about 10-15
seconds. After frequency is synchronized, the MCXO continues to operate as normal. In order to perform synchronization
again, the reference should be disconnected and connected one more time. Precision of synchronization is +/-5PPB.
Pin #29:
1PPS Output. This output provides 1PPS (1Hz) HCMOS signal. It also can be configured to provide 32.768 kHz HCMOS
signal. The configuration is one time programming at the factory according to customer request.
Pins #26, 30:
Synchronization Options. See Table II for detailed synchronization options. All operations are performed while in
‘Frequency Mode’ (See Pin #5, Mode Select).
Pin #5:
Mode Select. This pin is responsible for MCXO operating modes. If low level (<0.5V) signal is applied to the pin, MCXO
will start to operate in Frequency Mode. It will output signal with specified frequency at the pin #20. Pin #29 will be
disabled. Power consumption will be according to Frequency Mode specification. If high level (>2.8V) signal is applied to
the pin, MCXO will start to operate in Timing Mode. It will output 1PPS or 32.768 kHz signal at Pin #29. Power
consumption will be according to Timing Mode specification. Pin #20 will be disabled.
Pin #32:
Status. Status output has low level signal during normal operation. It provides low frequency signal (2-4Hz) for 5-10 seconds
after power is applied to Pin #38. It goes high during aging correction routine. It also goes high in case of MCXO
malfunction. It can be connected to LED to indicate MCXO status.
Other Pins:
Not Connected. Leave these pins not connected. They have internal functions and grounding them may lead to MCXO
malfunction.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
QPDS-0138 (Preliminary, June 2019)
Pin #38:
Voltage Supply. This pin provides positive voltage (3.3V) to the MCXO. Minimum value of bypass capacitor is 2.2uF. It
has to be installed close to Pin #38.
Contact factory for deviations from the standard functions and operation.
3
QT2020 MCXO
Q-TECH
CORPORATION
Table I - Electrical Characteristics
RADIATION TOLERANT MICROCOMPUTER COMPENSATED CRYSTAL OSCILLATOR
3.3Vdc - 5 to 100MHz, 32.768kHz and 1PPS
Parameters
Frequency Range
Supply Voltage
Power Consumption (max.)
Nominal Tolerance
Freq. Stability vs Temperature
Frequency Stability vs
Load Variation
Symbol
Conditions
Frequency Mode Parameters
fo
Vs
Ps
Fnom
Δf/fc (Ta)
Δfl
Δfv
Δf/fo
Vs, nom. / Ta = +25ºC (No Load)
Vs, nom. / Ta = +25ºC
See Ordering Codes on Page 1
HCMOS
SINE WAVE
10kΩ//15pF
50Ω ± 5%
±5% Load Change
±5% Input Voltage Change
Per Day
Over 10 Years
Over 20 Years
Value
5.000 - 100.000
3.3 ± 5%
90
±10
±20
±20
Unit
MHz
V
mW
ppb
ppb
ppb
ppb
Frequency Stability vs Voltage Supply
Variation
Aging (max.)
Output Waveform
Symmetry
Rise/Fall Time (max.)
Startup Time (max.)
Stabilization Time (max.)
Phase Noise (10MHz)
Phase Noise Jitter
Spurious (max.)
Aging Adjustment (10MHz ref.)
Frequency, Nominal
Power Consumption (max.)
Freq. Stability vs Temperature
Output Waveform
Symmetry
Rise/Fall Time (max.)
Startup Time (max.)
Stabilization Time (max.)
Period Jitter
Ft
Ps
Δf/Ft (Ta)
Over Operating Temperature
Over Operating Temperature
Over Operating Temperature
Over Operating Temperature
10Hz
100Hz
1kHz
10kHz
100kHz
1kHz to 20MHz
Over Operating Temperature, >1kHz offset
Ta = +25ºC, stable environment
HCMOS
3.3V
50 ± 5
3
±1.0
±1.0
±1.5
SINE WAVE
3 ± 3dBm
ppb
ppm
ppm
%
nsec
msec
sec
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
psec
dBc
ppm
PPS
mW
ppb
%
nsec
msec
sec
nsec
20
3
-110
-135
-150
-163
-168
1
-100
±0.02
1
90
Timekeeping Mode Parameters
Over Operating Temperature
Vs, nom. / Ta = +25ºC (No Load)
See Ordering Codes on Page 1
Over Operating Temperature
Over Operating Temperature
Over Operating Temperature
Over Operating Temperature
Table II - Synchronization Options
Synchronization Options
Pin #
Function
26
Sync 1
0
0
1
1
30
Sync 2
0
1
0
1
HCMOS 3.3V
50 ± 5
100
500
3
5
Logic Level
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
QPDS-0138 (Preliminary, June 2019)
Mode
All operations performed in ‘Frequency Mode’ (Pin #5)
Aging adjustment when signal present on Pin#1
Output frequency locked to 10MHz signal on Pin#1
Output frequency locked to 1PPS signal on Pin#13
Reference signals ignored
4
QT2020 MCXO
Q-TECH
CORPORATION
RADIATION TOLERANT MICROCOMPUTER COMPENSATED CRYSTAL OSCILLATOR
3.3Vdc - 5 to 100MHz, 32.768kHz and 1PPS
Table III - Maximum Ratings
Maximum Applied Voltage
Operating Temperature Range
Storage Temperature Range
Thermal Resistance
Thermal Resistance
Junction Temperature
Parameters
Symbol
Vs
Top
Tstg
JC
JB
(Non-operational)
Conditions
Min
0
-40
-55
Max.
5.5
+85
+105
38.5
94.5
+85
Unit
V
ºC
ºC
ºC/W
ºC/W
ºC
Phase Noise Plots
QT2020CD-10.000MHZ
QT2020SD-81.270MHZ
Temperature Stability
Allan Deviation
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
QPDS-0138 (Preliminary, June 2019)
5
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