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ACT4487 ACT 4487 SINGLE TRANSCEIVER FOR MIL-STD-1553/1760
型号:   ACT4487
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描述:   ACT 4487 SINGLE TRANSCEIVER FOR MIL-STD-1553/1760
文件大小 :   97 K    7 页
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品牌   AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
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ACT 4487 SINGLE TRANSCEIVER
FOR MIL-STD-1553/1760
Features
• +5 / ±15 Volt Supply Operation
• Low Power Dissipation
• Small Size & Light Weight
• Outstanding MIL-STD-1553 performance
• Radiation Hard Dielectric Isolation Monolithic
Construction for Severe Environments
• Superior High Frequency Line Transient and
Input Ripple Rejection
• Input and Output TTL Compatible Design
• Processed and Screened to MIL-STD-883 Specs
• MIL-PRF-38534 Compliant Devices Available
CIRCUIT TECHNOLOGY
www.aeroflex.com/act1.htm
General Description
The
Aeroflex
Circuit
Technology ACT 4487 is a next
generation monolithic transceiver
design
which
provide
full
compliance to MIL-STD-1553A/B
and 1760 requirements in a small
package
with
low
power
consumption.
The ACT 4487 series performs
the front-end analog function of
inputting and outputting data
through a transformer to the
MIL-STD-1553 data bus.
Design of this transceiver reflects
particular attention to active filter
performance. This results in low bit
and word error rate with superior
waveform purity and minimal zero
crossover
distortion.
Efficient
transmitter electrical and thermal
design provides low internal power
dissipation and heat rise at high as
well as low duty cycles.
Transmitter:
TX DATA OUT
TX DATA IN
DRIVER
TX DATA IN
ACTIVE
FILTER
OUTPUT
STAGE
TX DATA OUT
TX INHIBIT IN
+5V (V
L
)
+15V (V
CC
)
-15V (V
EE
)
GND1
GND2
GND3
RX DATA IN
RX DATA IN
CASE
RX STROBE IN
INPUT
AMPLIFIER
ACTIVE
FILTER
RX DATA OUT
COMP.
REFERENCE
COMP.
RX DATA OUT
Block Diagram (Without Transformer)
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1.4:1 ratio transformer, isolated on
the data bus side with two 52.5
Ohm fault isolation resistors, and
loaded
by
two
70
Ohm
terminations, the data bus signal is
typically 7.5 Volts P-P at point A
(See Figure 5). When both DATA
and DATA inputs are held low or
high,
the
transmitter
output
becomes a high impedance and is
“removed” from the line. In addition,
an overriding “INHIBIT" input
eroflex Circuit T
echnology
– Data Bus Modules For The Future © SCD4487 REV B 1/29/98
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