QT780 SERIES
Q-TECH
CORPORATION
Low Cost Space Crystal Oscillator
1.8V, 2.5V, 3.3V, 5Vdc
|
225kHz to 162.5MHz
Description
Q-Tech’s low profile extreme high shock hybrid
oscillators consist of an IC operating at various supply
voltages from 1.8V, 2.5V, 3.3V, and 5.0Vdc and a
miniature strip quartz crystal. The series is offered in
various ceramic package configurations from true
Surface-Mount SMT to straight leads and formed leads.
This is the smallest package offered with a 50kRad(Si)
TID for Low Earth Orbit (LEO) with high shock and high
reliability space applications.
Features
Made in the USA
ECCN: EAR99
50kRad(Si) Total Dose Ionization
Broad Frequency Range, 230kHz to 162.5MHz
Small Footprint
CMOS, LVHCMOS, LVDS
Various Supply Voltages, 1.8Vdc to 5.0Vdc
Wide Operating Temperature Range, -55°C to 125°C
Tri-State Output (Option D)
Hermetically sealed package
Fundamental and 3rd Overtone Designs
Screening per MIL-PRF-55310, Level B, with PIND
High Shock Resistant Tested Up to 20,000g Mechani-
cal Shock, Half-Sine, 0.3ms, All Axes
• Tape and Reel Packaging is available for an additional
cost (for SMD parts).
• Optional Hot Solder Dip, Sn60Pb40 or SAC305
• RoHS Compliant
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Ordering Information
(Sample part number)
Q T 781 L D
10
M - 50.000M H z
Q T 781
L
D
10
M - 50.000MHz
Solder Dip Options
T = Standard
S = Sn60Pb40
G = SAC305
Frequency
Output Frequency in
kHz or MHz
Screening
M =
Screening per MIL-PRF-55310,
Level B, modified
E =
Engineering Model
Package (*)
See Pages 2 and 7 - 14
Applications
• Commercial satellites
• Low Earth Orbit
Logic
HC = HCMOS +5V
L = CMOS +3.3V
N = CMOS +2.5V
R = CMOS +1.8V
(QT780, QT785, QT786, QT787,
QT793 & QT794 Only)
LW = LVDS
+3.3V
NW = LVDS
+2.5V
Tristate
(‘D’ not required for LW, NW)
2
6
7
9
10
11
12
15
16
=
=
=
=
=
=
=
(*) See package outlines for sizes (Pages 7 - 14)
(**) Frequency stability vs. temperature codes may not
be available in all frequencies.
19 =
Blank = No Tristate
D
= With Tristate
Temperature code (**)
±65ppm at -55°C to +125°C
±50ppm at -55°C to +105°C
±75ppm at -55°C to +125°C
±50ppm at -55°C to +125°C
±100ppm at -55°C to +125°C
±50ppm at -40°C to +85°C
±100ppm at -40°C to +85°C
±25ppm at -40°C to +85°C
±100ppm at -55°C to +105°C
±15ppm at 23ºC ± 1ºC
±50ppm at -55°C to +125°C reference
to F at 23ºC
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QPDS-0010 (Rev C, September 2020)
1 of 18
QT780 SERIES
Q-TECH
CORPORATION
Low Cost Space Crystal Oscillator
1.8V, 2.5V, 3.3V, 5Vdc
|
225kHz to 162.5MHz
PRODUCT OFFERINGS
Photo
Product
QT
QT781
Package
5x7mm
4 Pin Thru-hole
5x7mm
6 Pin Thru-hole
5x7mm
Surface Mount (SMD)
4 Pad SMT
5x7mm
Surface Mount (SMD)
6 Pad SMT
5x7mm
Surface Mount (SMD)
4 Pin Formed Lead
5x7mm
Surface Mount (SMD)
6 Pin Formed Lead
5x7mm
Surface Mount (SMD)
4 Pin Gull Wing
5x7mm
Surface Mount (SMD)
6 Pin Gull Wing
Surface Mount
(SMD)
4 Pin J-Lead
Surface Mount
(SMD)
4 Pin J-Lead
Surface Mount
(SMD)
4 Pin Gull Wing
Surface Mount
(SMD)
6 Pin Gull Wing
Surface Mount
(SMD)
4 Pin Formed Lead
Surface Mount
(SMD)
6 Pin Formed Lead
Output
Logic
CMOS
Vdd (V)
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
Frequency
Range
250kHz to 162.5MHz
Outline
Pin
Connection
7
QT786
CMOS
LVDS
250kHz to 162.5MHz
QT784
CMOS
250kHz to 162.5MHz
8
CMOS
LVDS
250kHz to 162.5MHz
QT785
QT782
CMOS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
9
QT787
CMOS
LVDS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
QT783
CMOS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
10
QT780
CMOS
LVDS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
QT778
CMOS
225kHz to 162.5MHz
11
CMOS
250kHz to 162.5MHz
QT788
QT790
CMOS
CMOS
LVDS
250kHz to 162.5MHz
12
250kHz to 162.5MHz
QT794
QT792
CMOS
250kHz to 162.5MHz
13
QT793
CMOS
LVDS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
QT789
4 Pin Thru-hole
CMOS
1.8Vdc, 2.5Vdc,
3.3Vdc, 5.0Vdc
250kHz to 162.5MHz
14
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QPDS-0010 (Rev C, September 2020)
2 of 18
QT780 SERIES
Q-TECH
CORPORATION
Low Cost Space Crystal Oscillator
1.8V, 2.5V, 3.3V, 5Vdc
|
225kHz to 162.5MHz
Electrical Performance Characteristics 225kHz to 162.5MHz CMOS
PARAMETERS
Output Frequency Range
(Fo)
Supply Voltage (Vdd)
Maximum Applied
Voltage (Vdd max.)
Operating Temperature
(Top)
Storage temperature
(Tsto)
R
225kHz – 85MHz
+1.8Vdc ± 10%
+5Vdc
N
225kHz – 100MHz
+2.5Vdc ± 10%
+5Vdc
See Ordering Information
-62°C to +125°C
L
225kHz – 162.5MHz
+3.3Vdc ± 10%
+5Vdc
HC
225kHz – 85MHz
+5Vdc ± 10%
+7Vdc
Supply current (Idd)
Note 1/
4mA Max. 225kHz – <40MHz
10mA Max. 40MHz – <50MHz
20mA Max. 50MHz – 85MHz
6mA Max. 225kHz – <40MHz
15mA Max. 40MHz – <60MHz
25mA Max. 60MHz – <85MHz
30mA Max. 85MHz – 100MHz
6mA Max. 225kHz – <16MHz
10mA Max. 16MHz – <32MHz
20mA Max. 32MHz – <70MHz
30mA Max. 70MHz – <125MHz
40mA Max. 125MHz – <140MHz
50mA Max. 140MHz – 162.5MHz
20mA Max. 225kHz – <16MHz
25mA Max. 16MHz – <32MHz
35mA Max. 32MHz – 85MHz
Load
Note 2/
Duty Cycle (Sym)
Note 3/
Rise and Fall Times
(Tr/Tf)
Note 4/
Start-Up Time (Tstup)
Output Voltage High
(VOH)
Output Voltage Low
(VOL)
Enable/Disable (Tristate
Option – D)
Aging at +70°C ± 3°C
Period Jitter 1σ (RMS)
Integrated Phase Jitter
Note 5/
10Hz Offset -74dBc/Hz
100Hz Offset -107dBc/Hz
1kHz Offset -130dBc/Hz
10kHz Offset -135dBc/Hz
100kHz Offset -145dBc/Hz
1MHz Offset -150dBc/Hz
VIH
≥
0.7*Vdd Oscillation
VIL
≤
0.3*Vdd High Impedance
45/55% Max. 225kHz – <16MHz
40/60% Max. 16MHz – 85MHz
15pF//10kΩ
45/55% Max. 225kHz – <16MHz
40/60% Max. 16MHz – 100MHz
45/55% Max. 225kHz – <16MHz
40/60% Max. 16MHz – 162.5MHz
45/55% Max. 225kHz – <16MHz
40/60% Max. 16MHz – 85MHz
6ns Max. for Fo < 40MHz
3ns Max. for Fo
≥
40MHz
10ms Max.
0.9*Vdd Min.
0.1*Vdd Max.
VIH
≥
2.2Vdc Oscillation
VIL
≤
0.8Vdc High Impedance
±5ppm First Year Max.
±2ppm max. Each Year Thereafter
5ps Typ.
1ps Max.
10Hz Offset -78dBc/Hz
100Hz Offset -109dBc/Hz
1kHz Offset -130dBc/Hz
10kHz Offset -135dBc/Hz
100kHz Offset -145dBc/Hz
1MHz Offset -150dBc/Hz
Phase Noise (Typical)
Notes
1/ No Load.
2/ Consult factory for different load. Capable to drive up to: 50pF (5V) and 30pF (3.3V and 2.5V).
3/ Measured at 1/2 Vdd.
4/ Measured between 10% and 90%.
5/ Period Jitter: By design; not tested. Integrated Phase Jitter: 12kHz to 20MHz.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QPDS-0010 (Rev C, September 2020)
3 of 18
QT780 SERIES
Q-TECH
CORPORATION
Low Cost Space Crystal Oscillator
1.8V, 2.5V, 3.3V, 5Vdc
|
225kHz to 162.5MHz
(For BiCMOS +2.5Vdc and +3.3Vdc LVDS Ouputs)
Electrical Performance Characteristics 40MHz to 162.5MHz LVDS
Maximum Ratings
Parameters
Supply Voltage
Operating Temperature
Storage Temperature
Lead Solder Temperature
Package Thermal Resistance
Junction Temperature
Symbol
Vdd
Top.
Tstg
ѲJc
Min.
-0.5
-55
-62
Max.
+5
+125
+125
260/10
50
+150
Units
V
°C
°C
°C/seconds
°C/W
ºC
Recommended Operating Conditions
Electrical Parameter
Frequency Range
Frequency/Temperature Stability
Supply Voltage
Input Current
Output Voltage VOL
Output Voltage VOH
Differential Output Voltage (VOD)
Offset Voltage (VOS)
Output Waveform
Rise and Fall Time
Duty Cycle
Load
Measured without load
at maximum Vdd
0.90
247
1.125
20% to 80%
50% of output
1.1
1.45
330
1.25
Square Wave
Test Conditions
+2.5Vdc
+3.3Vdc
See temperature codes
Limits
Min.
80
40
-55
3.135
2.375
Nom.
Max.
162.5
162.5
+125
3.465
2.625
66
Units
MHz
°C
Vdc
Vdc
mA
Vdc
Vdc
mV
V
N/A
ps
%
Ω
ppm
ppm
Notes
+25
3.3
2.5
(See Note 1)
1.65
454
1.375
600
55
50
100Ω
(Connected between Q & QNOT)
±1.5
±2
45
Frequency Aging after 30 days
70°C±3°C
40MHz < F < 150MHz
150MHz < F < 162.5MHz
(See Note 2)
Frequency Aging/Year
Start-up Time
Output Enable VIH
Output Disable VIL
70°C±3°C
100µs ramp
0.7xVcc
±5
10
0.3xVcc
ppm
ms
Vdc
Vdc
(See Note 3)
Output High Impedance
NOTES:
1. Frequency stability compared to nominal frequency including initial accuracy at 25°C, load, and supply variations ±5%.
Frequency Stability code 19, measure frequency parameter at +23ºC ± 1ºC.
2. Normally frequency aging is up 30 days. However, aging may be ceased if value at 15 days is half than the limit of 30-day aging
value, or continued up to 90 days if value exeeds 30 day aging limit.
3. Aging is ±5ppm after first year and ±2ppm/year thereafter.
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QPDS-0010 (Rev C, September 2020)
4 of 18
QT780 SERIES
Q-TECH
CORPORATION
Low Cost Space Crystal Oscillator
1.8V, 2.5V, 3.3V, 5Vdc
|
225kHz to 162.5MHz
V
DD
Typical test circuit for CMOS logic
Q
+ mA
+
Power
supply
-
+
Vdc
0.1μF
or
0.01μF
4
3
Output
CMOS
1
2
15pF
(*)
10k
Ground
Tristate Function
100
6
1
5
LVDS
3
VOL
e/d
LVDS TERMINATION
4
VOD
VOH
Q
-
(*) CL includes probe and jig capacitance
Figure 1 – Circuit Diagrams
Offset Frequency (Hz)
10
100
1E3
1E4
1E5
1E6
40MHz
-70
-101
-131
-153
-160
-160
80MHz
-70
-100
-130
-150
-160
-160
Figure 2 – Typical Phase Noise of a 40MHz QT781L-32.000MHz
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-te ch.com
QPDS-0010 (Rev C, September 2020)
5 of 18
