ACT4418 Aeroflex Circuit Technology, ACT4418 Datasheet

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ACT4418

Manufacturer Part Number
ACT4418
Description
Act4418 Molded Dual Variable Amplitude Transceivers For MacaIR A3818, A5690, A5232, A4905 & Mil-std-1553
Manufacturer
Aeroflex Circuit Technology
Datasheet
Features
• ACT4418 Dual Transceivers meets
• ±12 Volt Power Supply Operation
• Voltage source output for higher bus
• Molded Plug-in package
• Monolithic construction using linear
• Variable TX Amplitude
• Processed and Screened to Mil-STD-883
ACT4418 Molded Dual Variable Amplitude Transceivers
MIL-STD-1553A&B, Macair A3818,
A4905, A5232 and A5690 Specs
drive power
ASICs
Specs for Industrial temperature range
RX DATA IN
RX DATA IN
TX DATA IN
TX DATA IN
TX INHIBIT
eroflex Circuit T
GROUND
STROBE
+12V
-12V
+5V
for MACAIR A3818, A5690, A5232, A4905
Block Diagram (without Transformer)
DRIVER
INPUT
AMP
echnology
One Channel
SHAPING
ACTIVE
FILTER
V-
– Data Bus Modules For The Future © SCD4418D REV A 9/24/97
& MIL-STD-1553
V+
OUTPUT
STAGE
COMP.
COMP.
TX DATA OUT
TX DATA OUT
AMP CONTROL
RX DATA OUT
RX DATA OUT
ACT4418D is a new generation
monolithic transceivers which provide
full compliance with Macair and MIL-
STD-1553 data bus requirements
while providing variable amplitude
control.
end analog function of inputting and
outputting data through a transformer
to a MIL-STD-1553 or Macair data
bus. The ACT4418D can be consid-
ered a "Universal" Transceiver in that
it is compatible with MIL-STD-1553A,
B, Macair A-3818, A-4905, A-5232
and A-5690.
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. The ACT4418D
active filter design has additional high
frequency roll-off to provide the
required
distortion
increasing
characteristics significantly.
thermal design provides low internal
power dissipation and heat rise at
high and well as low duty cycles.
0–10 Vdc on the control pin.
Transmitter:
phase TTL data at the input and
when coupled to the data bus with a
1:1 transformer, isolated on the data
bus side with two 52.5 Ohm fault iso-
lation resistors, and loaded by two 70
General Description
The Aeroflex Circuit Technology
The ACT4418D performs the front-
Design
Efficient transmitter electrical and
Variable amplitude is adjusted with
The Transmitter section accepts bi-
www.aeroflex.com/act1.htm
CIRCUIT TECHNOLOGY
Macair
of
the
waveform
these
low
pulse
transceivers
harmonic
without
delay

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ACT4418 Summary of contents

Page 1

... ACT4418 Molded Dual Variable Amplitude Transceivers for MACAIR A3818, A5690, A5232, A4905 Features • ACT4418 Dual Transceivers meets MIL-STD-1553A&B, Macair A3818, A4905, A5232 and A5690 Specs • ±12 Volt Power Supply Operation • Voltage source output for higher bus drive power • ...

Page 2

... Waveforms shown are for normally low devices. For normally high receiver output : level devices, the receiver outputs are swapped as shown by the dashed lines Aeroflex Circuit Technology 1 MHz to meet Macair specifications A-3818, A-4905, A-5232 and A- 5690. The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short circuit ...

Page 3

... Output offset at point A-A’on Fig 5, 2.5 µS after midpoint crossing of the parity bit of the last word of a 660 µS message Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal. (note 1.) Aeroflex Circuit Technology Absolute Maximum Ratings ±12 V P.S. to ±15V MAX Condition Symbol ...

Page 4

... Power Supply Currents (Typical) – Per Channel – See Figure 4 (Power supplies set at +12V, -12V, +5V) Duty Cycle Transmitter Standby 25% duty cycle 50% duty cycle 100% duty cycle Note: Typical currents for V 140 O AT Recommended Power Supply Voltage Range +V -V Logic Aeroflex Circuit Technology Condition Symbol V IDR V Note 1 ICR CMRR Note =0.4 V ...

Page 5

... Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3K minimum at 1 MHz. 3. Specifications apply over the temperature range of -40°C to +85°C (Case Temperature) unless otherwise noted. 4. All typical values are measured at +25°C. Aeroflex Circuit Technology Figure 4 Transmitter (TX) Output offset 0 Volts Slope = 3V - ...

Page 6

... Aeroflex Circuit Technology Figure 6 – Lead Numbers & Functions ACT4418D Pin Function Channel # 1 Tx INHIBIT DATA DATA STROBE A 5 CONTROL VOLTAGE DATA OUT DATA OUT B 9 TxRx DATA OUT B 10 TxRx DATA OUT B 11 ...

Page 7

... .008 .600 Model No. ACT4418D The information contained in this data sheet is believed to be accurate; however, Aeroflex Circuit Technology. assumes no responsibility for its use, and no license or rights are granted by implication or otherwise in connection the Specifications subject to change without notice. ...

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