ACT4419D
Dual Variable Amplitude Transceivers
for MIL-STD-1553
Features
鈥?World鈥檚 smallest and lowest standby power dual variable
amplitude transceiver 0.3" x 1.2" packages
鈥?Lowest standby power
鈥?Dual transceiver meets military data bus requirements,
MIL-STD-1553
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?Radiation Hard to 300 KRADS total dose
鈥?DESC SMD pending
鈥?+5V Control line
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology
model ACT4419D is a next
generation
D.I.
monolithic
transceiver
which
provides
variable
amplitude
in
full
compliance with MIL-STD-1553
data bus requirements with the
lowest
standby
power
consumption available and one
power supply operation.
The
dual
channel
model
ACT4419D performs the front-end
analog function of inputting and
outputting
data
through
a
transformer to a MIL-STD-1553
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.
Variable amplitude is adjusted
with factory preset 0 鈥?5 Vdc
control line at 1 mA maximum
input current at 5 Volts.
ACT4419D Dual Transceivers
Channel B
TX/RX
TX DATA IN
TX DATA IN
DRIVER
SHAPING
OUTPUT
STAGE
TX/RX
V
CONT
TX INHIBIT
Channel A
+5 V
Channel B
GROUND
REFERENCE
COMP.
RX DATA OUT
Transmitter
The Transmitter section accepts
bi-phase TTL data at the input
and when coupled to the data bus
with a
primary grounded center
tap 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
INPUT
AMP
ACTIVE
FILTER
COMP.
RX DATA OUT
STROBE
Block Diagram (without Transformer, Channel A shown)
eroflex Circuit T
echnology
鈥?Data Bus Modules For The Future 漏 SCD4419D REV G 5/10/00
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