ACT4468D
Dual Transceivers for MIL-STD-1553
Features
鈥?World鈥檚 smallest and lowest standby power dual
transceiver 0.3" x 1" packages
鈥?Dual transceiver meets military data bus
requirements, MIL-STD-1553 and MIL-STD-1760
鈥?Low power dissipation at full output power
鈥?Single +5V power supply
鈥?Current source output
鈥?Monolithic construction using dielectrically
isolated(D.I.)
鈥?Processed and screened to MIL-STD-883 specs
鈥?DESC SMD# 5962鈥?2061 Pending
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology
Model ACT4468D is a next
generation D.I. monolithic transceiver
which provide full compliance with
MIL-STD-1553/1760 and data bus
requirements
in
the
smallest
packages with the lowest standby
power consumption and one power
supply operation.
The dual channel Model ACT4468D
perform the front-end analog function
of inputting and outputting data
through
a
transformer
to
a
MIL-STD-1553/1760 data bus.
Design of these transceivers 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.
ACT4468D Dual Transceiver
Each channel of the dual transceiver
is completely separate from the other
and fully independent. This includes
power leads as well as signal lines.
Hence, each channel may be
connected to a different data bus with
no interaction.
TX/RX
TX/RX
TX DATA IN
TX DATA IN
DRIVER
SHAPING
OUTPUT
STAGE
Transmitter:
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:2.5 transformer, isolated on the
data bus side with two 52.5 Ohm fault
isolation resistors, and loaded by two
70 Ohm terminations plus additional
receivers, the data bus signal
produced is 7.5Volts nominal P-P at
A-A鈥? (See Figure 5.) When both
DATA and DATA inputs are held low or
high, the transmitter output becomes
TX INHIBIT
RX DATA OUT
+5 V
REFERENCE
COMP.
GROUND
INPUT
AMP
ACTIVE
FILTER
COMP.
RX DATA OUT
STROBE
Block Diagram (without Transformer), 1/2 of unit shown
eroflex Circuit T
echnology
鈥?Data Bus Modules For The Future 漏 SCD4468D REV B 5/25/00
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