Q-Tech QT78TD - Manual (Page 3)

MIL-PRF-55310/28C
3
TABLE I. Dash numbers and operating characteristics.
1/ Maximum input current for no load condition. Actual configuration of TTL loads must be added to determine
power supply requirements.
2/ A TTL unit load is defined as: 1.6 mA sink, 0.04 mA source, and 2 pF capacitance.
Frequency-temperature tolerance (one-half temperature cycle, referenced to frequency measured at +23
°C ±1°C,
immediately prior to starting of the test): See table I. Measurements taken at ten equally spaced increments over
the specified operating temperature range. 1/
Frequency-voltage tolerance:
±4 ppm maximum for a ±10 percent change in supply voltage. Measurements taken
at reference temperature and operating temperature range end points.
Frequency aging: Measurements shall be taken at +70
°C ±0.2°C at intervals of not more than every 72 hours for a
minimum of 30 days (see table I).
±10 ppm per year, maximum
±1.5 ppm per 30 days.
±3 ppm per 90 days.
Terminal strength: Method
211 of MIL-STD-202 , test condition A.
Applied force: 8 ounces each terminal.
1/ For the purpose of transitioning this device to
MIL-PRF-55310 , ‘Frequency stability versus temperature’ has been
renamed ‘Frequency-temperature tolerance’. The verification requirements of ‘initial frequency-temperature accuracy
(one-half temperature cycle)’ shall apply except that frequency measurements shall be referenced to the frequency
measured at +23
°C ±1°C (f
ref
) instead of to the nominal frequency (f
nom
).
Pulse characteristics Frequency-temperature
tolerance (ppm)
-55
°C
to
+125
°C
-55
°C
to
+105
°C
-20
°C
to
+70
°C
Dash
number Output
frequency
range
Input
current
max
1/
Rise
and fall
times
(max)
Duty cycle at
1.4 V
Load
(max)
2/
Initial
accuracy
ppm at
+23
°C
±1°C
A B C
01 1.000 MHz to
14.999 MHz 10 mA 5 ns 45% to 55% 10 TTL ±15 ppm ±50
ppm
±40
ppm
±25
ppm
04 1.000 MHz to
14.999 MHz 10 mA 5 ns 45% to 55% 10 TTL ±25 ppm ±100
ppm
±80
ppm
±50
ppm
11 15.000 MHz to
29.999 MHz 15 mA 5 ns 40% to 60% 10 TTL ±15 ppm ±50
ppm
±40
ppm
±25
ppm
14 15.000 MHz to
29.999 MHz 15 mA 5 ns 40% to 60% 10 TTL ±25 ppm ±100
ppm
±80
ppm
±50
ppm
21 30.000 MHz to
59.999 MHz 25 mA 3 ns 40% to 60% 10 TTL ±15 ppm ±50
ppm
±40
ppm
±25
ppm
24 30.000 MHz to
59.999 MHz 25 mA 3 ns 40% to 60% 10 TTL ±25 ppm ±100
ppm
±80
ppm
±50
ppm
31 60.000 MHz to
85.000 MHz 40 mA 3 ns 40% to 60% 10 TTL ±15 ppm ±50
ppm
±40
ppm
±25
ppm
34 60.000 MHz to
85.000 MHz 40 mA 3 ns 40% to 60% 10 TTL ±25 ppm ±100
ppm
±80
ppm
±50
ppm