ACT4453 Aeroflex Circuit Technology, ACT4453 Datasheet - Page 2

• Manufacturer Part Number: ACT4453
• Description: Act 4453 / 4463 Single Supply Transceivers For Mil-std-1553/1760
• Manufacturer: Aeroflex Circuit Technology

Aeroflex Circuit Technology
two 70 Ohm terminations, the data
bus signal is typically 7 volts P-P at
A-A' (See Figure 5). When both
DATA and DATA inputs are held low
or
becomes a high impedance and is
“removed” from the line. In addition,
an
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,
Transmitter may be safely operated
LINE TO LINE
DATA IN
DATA IN
INHIBIT
LINE TO LINE
STROBE
DATA OUT
DATA OUT
INPUT
OUTPUT
* See Figure 8 For Actual Waveforms
Figure 1 — Transmitter Logic Waveforms Idealized
Figure 2 — Receiver Logic Waveforms Idealized
high,
overriding
Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,
the
and must be in the same state during off times (both high or low).
Figure
transmitter
“INHIBIT
1.)
output
input
The
for an indefinite period with the bus
(point A-A') short circuited at 100%
duty cycle.
Receiver:
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
threshold.(See
Waveform. Figure 2.)
The Receiver section accepts
The pre-set internal thresholds will
a
*
2
*
Receiver
pre-determined
Note overlap
Logic
detect data bus signals exceeding
1.20 Volts P-P and reject signals
less than 0.6 volts P-P when used
with a transformer. (See Figure 5
for transformer data and typical
connection.)
inhibits the DATA
outputs. If unused, a 2K pull-up to
+5 Volts is recommended
SCD4453 REV A 1/29/98 Plainview NY [phone]
A low level at the Strobe input
and DATA