ACT4419 Aeroflex Circuit Technology, ACT4419 Datasheet - Page 2

• Manufacturer Part Number: ACT4419
• Description: Single Supply Variable Amplitude Transceivers For Mil-std-1553
• Manufacturer: Aeroflex Circuit Technology

overriding “INHIBIT" input provides
for the removal of the transmitter
output from the line. A logic “1”
applied to the “INHIBIT” takes priority
over the condition of the data inputs
and disables the transmitter. (See
Transmitter Logic Waveform, Figure
1).
The transceiver utilizes an active
filter to suppress harmonics above
1MHz.
safely operated at 100% duty cycle
for an indefinite period into a short
circuited 1553 bus.
Aeroflex Circuit Technology
Figure 1 - Transmitter Logic Waveforms
DATA IN
DATA IN
INHIBIT
LINE TO LINE
NOTES:
LINE TO LINE
DATA OUT
DATA OUT
OUTPUT
Figure 2 - Receiver Logic Waveforms
INPUT
1.DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them.
2.DATA and DATA must be in the same state during off time (both high or low).
The Transmitter may be
NOTE
:
level devices, the receiver outputs are swapped as shown by the dashed lines.
Waveforms shown are for normally low devices. For normally high receiver output
Receiver
The
bi-phase differential data at the input
and produces two TTL signals at the
output. The outputs are DATA and
DATA, and represent positive and
negative excursions of the input
beyond a pre-determined threshold.
(See
Figure 2).
The pre-set internal thresholds will
detect data bus signals exceeding
1.150 Volts P-P and reject signals
less than 0.6 volts P-P when used
with a 1:2.5 turns ratio transformer.
(See Figure 5 for transformer data
and typical connection).
Receiver
Receiver
2
Logic
section
Waveform.
accepts
Note overlap
SCD4419 REV B 10/21/99 Plainview NY [phone]
CIRCUIT TECHNOLOGY