ARX 4418 & 4417 Variable Amplitude Transceivers for
MACAIR A3818, A5690, A5232, A4905
& MIL-STD-1553
Features
• ARX 4418 Transceiver meets MIL-STD-1553A&B,
Macair A3818, A4905, A5232 and A5690 specs
• ARX 4417 Transceiver meets MIL-STD-1553 specs
• Operates with ±15 Volts to ±12 Volts power supply
• Voltage source output for higher bus drive power
• Plug-in, flat package or low profile flat package
• Monolithic construction using linear ASICs
• Variable receiver threshold capability
• Variable TX Amplitude
• Processed and screened to Mil-STD-883 specs
• DESC SMD (Standard Military Drawing)
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The
Aeroflex
Laboratories
transceiver models ARX 4418 and
ARX 4417 are new generation
monolithic transceivers which provide
full compliance with Macair and
MIL-STD-1553 data bus requirements
while providing variable amplitude
control.
The model ARX 4418 and model
ARX 4417 perform the front-end
analog function of inputting and
outputting data through a transformer
to a MIL-STD-1553 or Macair data
bus. The ARX 4418 can be
considered a "Universal" Transceiver
in that it is compatible with
MIL-STD-1553A, B, Macair A-3818,
A-4905, A-5232 and A-5690. The
ARX 4417 is compatible with
MIL-STD-1553A/B.
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. The ARX4418
series active filter design has
additional high frequency roll-off to
provide the required Macair low
harmonic distortion waveform without
increasing the pulsedelay characteris-
tics significantly.
Efficient transmitter electrical and
thermal design provides low internal
power dissipation and heat rise at
high and well as low duty cycles.
Variable amplitude is adjusted with
0–10 Vdc on the control pin. An
optional receiver input threshold
adjustment can be accomplished by
the use of the "Set Internal
Threshold" terminals.
ARX 4418FP/4418 Transceivers
TX DATA OUT
TX DATA IN
TX DATA IN
V+
TX INHIBIT
EX THRESHOLD
DATA
DATA
SET INTERNAL
THRESHOLD DATA
EX THRESHOLD
DATA
+5 V
-12V or -15V
RX DATA IN
RX DATA IN
+15V or +12V
STROBE
INPUT
AMP
COMP.
RX DATA OUT
AMP CONTROL
DRIVER
SHAPING
OUTPUT
STAGE
TX DATA OUT
V-
ACTIVE
FILTER
COMP.
RX DATA OUT
Block Diagram (without Transformer)
eroflex Circuit T
echnology
– Data Bus Modules For The Future © SCD4418 REV B 10/18/99
Transmitter
The Transmitter section accepts
bi-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
isolation resistors, and loaded by
two 70 Ohm terminations plus
additional receivers, the data bus
signal produced is 7.0 volts
minimum P-P at A-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 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 Waveforms,
Figure 1.)
The transmitter utilizes an active
filter to suppress harmonics above
1MHz 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.
Receiver
The Receiver section accepts
bi-phase differential data at the input
and produces two TTL signals at the
output. The outputs are DATA and
DATA, and represent positive and
negative excursions of the input
beyond a pre-determined threshold.
(See Receiver Logic Waveforms,
Figure 2.)
The internal threshold is nominally
set to detect data bus signals
exceeding 1.05 Volts P-P and reject
signals less than 0.6 volts P-P when
used with a 1:1 turns ratio
transformer. (See Figure 5 for
transformer
data
and
typical
connection.) This threshold setting
can be held by grounding the
appropriate pins or modified with the
use of external resistors.
A low level at the Strobe input
inhibits the DATA and DATA outputs.
If unused, a 2K pull-up to +5 Volts is
recommended.
Figure 1 – Transmitter Logic Waveforms
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
NOTES:
1. Line to line waveforms illustrate Macair signals, MIL-STD-1553 signals are trapezoidal
2. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them.
3. DATA and DATA must be in the same state during off time (both high or low).
Figure 2 – Receiver Logic Waveforms
LINE TO LINE
INPUT
DATA OUT
DATA OUT
Note overlap
NOTE
:
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
2
SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Operating Case Temperature
Storage Case Temperature
Power Supply Voltages
Logic Input Voltage
Receiver Differential Input
Receiver Input Voltage (Common Mode)
Driver Peak Output Current
Total Package Power Dissipation over the Full
Operating Case Temperature Range
Power Dissipation for hottest die, (100% duty cycle)
Maximum junction to case temperature rise for the
hottest device (100 % duty cycle)
Junction-Case, Thermal Resistance for hottest device
-55°C to +125°C
-65°C to +150 °C
±15 V P.S. to ±18V MAX
+5 V P.S. to +7V MAX
-0.3 V to +5.5 V
±40 V
±10V
300 mA
2.4 Watts
600 mW
36°C
60°C/W
Electrical Characteristics, Transmitter Section
Input Characteristics, TX DATA in or TX DATA in
Parameter
Condition
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
V
IN
= 0.4 V
V
IN
= 2.7 V
Symbol
I
ILD
I
IHD
V
ILD
V
IHD
Min
Typ
-0.2
1.0
Max
-0.4
40
0.7
Unit
mA
µA
V
V
2.0
Inhibit Characteristics
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Delay from TX inhibit, (0
→
1) to inhibited
output
Delay from TX inhibit, (1
→
0) to active output
Differential output noise, inhibit mode
Differential output impedance (inhibited)
Note 2
Note 1
Note 1
V
IN
= 0.4V
V
IN
= 2.7V
I
ILI
I
IHI
V
ILI
V
IHI
t
DXOFF
t
DXON
V
NOI
Z
OI
-
-
-
2
-
-
-
2K
-0.2
1.0
-
-
400
400
0.8
-
-0.4
40
0.7
-
500
500
10
-
mA
µA
V
V
nS
nS
mV p-p
Ω
Output Characteristics
Differential output level at point B–B’ Fig 5,
Vcont = 10 Vdc, See Fig 3 for control voltage
versus output level
Rise and fall times
(10% to 90% of p-p output)
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
R
L
= 140
Ω
V
O
t
R
28
200
-
-
30
250
-
330
-
36
300
±90
450
360
V p-p
nS
mV peak
nS
nS
RL = 35
Ω
ARX4418
V
OS
t
DTX
ARX4417
3
-
SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Electrical Characteristics, Receiver Section
Parameter
Differential Input Impedance
Differential Input Voltage Range
Input Common Mode Voltage Range
Common Mode Rejection Ratio Note 3
Note 1
Note 1
Condition
f = 1MHz
Symbol
Z
IN
V
IDR
V
ICR
CMRR
Min
20K
Typ
100K
Max
40
Unit
W
V p-p
V p-p
dB
10
40
Strobe Characteristics (Logic "0" inhibits output)
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Strobe Delay (turn-on or turn-off)
Note 1
V
S
= 0.4 V
V
S
= 2.7V
I
IL
I
IH
V
IL
V
IH
t
SD
-
-
-
2.0
-
-0.2
-1.0
-
-
-
-0.4
+40
0.7
-
150
mA
µA
V
V
nS
Threshold Characteristics (Sinewave input)
Internal Threshold Voltage (referred to the
bus) pins 6 and 11 grounded
External threshold control (pins 6 &11 open,
resistors from pin 5 and 12 to ground)
100KHz-
1MHz
Max R =
10K
Ω
V
TH
R
TH
/ V
TH
0.60
-
0.8
4000
1.05
-
V p-p
Ω
/ V p-p
Output Characteristics, RX DATA and RX DATA
"1" State
"0" State
Delay, (average) from differential input zero
crossings to RX DATA and RX DATA output
50% points
I
OH
= -0.4
mA
I
OL
= 4 mA
Note 1
V
OH
V
OL
t
DRX
2.5
-
-
3.6
0.35
300
-
0.5
450
V
V
nS
Power Data
Power Supply Currents (Power supplies set at +15V, -15V, +5V)
Duty Cycle
Transmitter Standby
25% duty cycle Note 1
50% duty cycle
100% duty cycle Note 1
+V
60mA
80mA
105mA
160mA
-V
75mA
95mA
120mA
180mA
5V
35mA
Recommended Power Supply Voltage Range
+V
-V
Logic
+11.4 Volts to +15.75 Volts
-11.4 Volts to -15.75 Volts
+4.5 Volts to + 5.5 Volts
Aeroflex Circuit Technology
4
SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Figure 3 – Transmitter (TX) Output Amplitude
vs Control Voltage
V
P
-
P
@ B–B'
30
27
24
OUTPUT AMPLITUDE
21
18
15
12
9
6
3
0
0
1
2
3
4
5
6
7
8
9
Vdc
10
Slope = 3V
P
-
P
/Vdc
Typical
Figure 4 – Transmitter (TX) Output offset
LAST BIT
Magnified View
OUTPUT OFFSET
*
0 Volts
OUTPUT OFFSET
*
2.5 µsec
*Offset measured at point A-A’ in Fig 5
CONTROL VOLTAGE
Figure 5 – Typical Transformer Connection
70Ω
70Ω
Figure 6 – Power Dissipation vs Duty Cycle
4.0
N1:N2
B
52.5Ω
A
Center
tap
B’
TX DATA OUT
52.5Ω
RX DATA IN
RX DATA IN
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.707
Use Aeroflex 25T1553-1
0
0
10
20
30
40
50
60
70
80
90 100
A’
N1:N3 for
stub
coupling
POWER DISSIPATION
WATTS
3.5
3.0
2.5
(TYPICAL)
2.0
1.5
1.0
0.5
TX DATA OUT
DUTY CYCLE, PERCENT
NOTES
1. Characteristics guaranteed by design, not production tested.
2. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3K
Ω
minimum at
1MHz.
3. Specifications apply over the temperature range of -55°C to +125°C (Case Temperature) unless otherwise noted.
4. All typical values are measured at +25°C.
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 therewith.
Aeroflex Circuit Technology
5
SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
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