ACT4455 Aeroflex Circuit Technology, ACT4455 Datasheet - Page 2

• Manufacturer Part Number: ACT4455
• Description: Act 4455 / 4459 Single Supply Transceivers For Mil-std-1553/1760
• Manufacturer: Aeroflex Circuit Technology

Aeroflex Circuit Technology
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
for an indefinite period with the bus
(point A-A') short circuited at 100%
duty cycle.
Receiver:
bi-phase differential data at the input
LINE TO LINE
DATA IN
DATA IN
INHIBIT
LINE TO LINE
STROBE
DATA OUT
DATA OUT
The Receiver section accepts
INPUT
OUTPUT
* See Figure 8 For Actual Waveforms
Figure 1 — Transmitter Logic Waveforms Idealized
Figure 2 — Receiver Logic Waveforms Idealized
overriding
Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,
and must be in the same state during off times (both high or low).
Figure
“INHIBIT
1.)
input
The
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.)
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
connection.)
The pre-set internal thresholds will
a
data
*
2
*
Receiver
pre-determined
and
Note overlap
typical
Logic
SCD4455 REV A 1/29/98
inhibits the DATA
outputs. If unused, a 2K pull-up to
+5 Volts is recommended
A low level at the Strobe input
Plainview NY [phone]
and DATA