Standard Products
ARX4418 & ARX4417 Variable Amplitude Transceiver
for MACAIR (A3818, A4905, A5232, A5690), MIL-STD-1553
& SAE-AS15531
www.aeroflex.com/Avionics
March 31, 2005
FEATURES
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ARX4418 Transceiver meets Macair (A3818, A4905, A5232 and A5690) & MIL-STD-1553A/B
ARX4417 Transceiver meets MIL-STD-1553 and SAE-AS15531
Bipolar supply ±15V to ±12V, Logic supply +5V
DC
Variable TX amplitude
Variable receiver threshold capability
Monolithic construction
Voltage source output for higher bus drive power
Designed for commercial, industrial and aerospace applications
MIL-PRF-38534 compliant devices available
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
DESC SMD 5962-9208503
GENERAL DESCRIPTION
The Aeroflex Plainview transceiver model ARX4418 and is a new generation monolithic transceiver which provide full compliance
with Macair and MIL-STD-1553 data bus requirements while providing variable amplitude control.
The model ARX4418 and ARX4417 performs the front-end analog function of inputting and outputting data through a transformer
to a MIL-STD-1553 or Macair data bus.
The ARX4418 can be considered a "Universal" Transceiver in that it is compatible with Macair (A-3818, A-4905, A-5232 and
A-5690), MIL-STD-1553A/B and SAE-AS1553. The ARX4417 is compatible with MIL-STD-1553A/B and SAE-AS15531.
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 active filter design has additional high frequency
roll-off to provide the required Macair low harmonic distortion waveform without increasing the pulse delay characteristics
significantly.
Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high and low duty cycles.
An optional receiver input threshold adjustment can be accomplished by the use of the ''External Threshold" terminals or by the use
of the "Set Internal Threshold" terminals. Variable amplitude is adjusted with 0–10 V
DC
on the control pin.
TRANSMITTER
The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 transformer the data bus
signal produced is 7.0 Volts minimum P-P at point 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 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.
The transceiver utilizes an active filter to suppress harmonics above 1MHz. The Transmitter may be safely operated at 100% duty
cycle for an indefinite period into a short circuited 1553 bus.
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 Vp-p and reject signals less than 0.6 Vp-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 Ohm pull-up to +5V
DC
is recommended.
SCD4418 Rev C
TX DATA IN
TX DATA IN
TX INHIBIT
GND
CASE GND
EXT THRESHOLD
DATA
DATA
SET INTERNAL
THRESHOLD
EXT. THRESHOLD
DATA
+5V
-12V or -15V
RX DATA IN
RX DATA IN
+12V or +15V
STROBE
DATA
TX DATA OUT
DRIVER
SHAPING
OUTPUT
STAGE
TX DATA OUT
AMP CONTROL
V+
COMP.
RX DATA OUT
V-
INPUT
AMP
ACTIVE
FILTER
COMP.
RX DATA OUT
BLOCK DIAGRAM (WITHOUT TRANSFORMER
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 1 – TRANSMITTER LOGIC WAVEFORMS IDEALIZED
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
FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED
SCD4418 Rev C
2
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
±15V
DC
to ±18V
DC
-0.3 V to +5.5 V
±40 V
±10V
300 mA
2.4 Watts
600 mW
36°C
60°C/W
+5V
DC
to +7V
DC
ELECTRICAL CHARACTERISTICS – TRANSMITTER SECTION
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN
Parameter
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Condition
V
IN
= 0.4V
V
IN
= 2.7V
-
-
Symbol
I
ILD
I
IHD
V
ILD
V
IHD
Min
-
-
-
2.0
Typ
-0.2
1
-
-
Max
-0.4
40
0.7
-
Unit
mA
µA
V
V
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)
V
IN
= 0.4V
V
IN
= 2.7V
-
-
Note 1
Note 1
-
Note 2
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
mVp-p
Ω
OUTPUT CHARACTERISTICS
Differential output level at point B–B’ Figure 5,
Vcont = 10 Vdc, See Figure 6 for control voltage versus
output level
Rise and fall times
(10% to 90% of p-p output)
Output offset at point A-A’ on Figure 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)
SCD4418 Rev C
R
L
= 140
Ω
V
O
28
30
36
V p-p
-
R
L
= 35
Ω
t
R
V
OS
200
-
250
-
300
±90
nS
mV peak
ARX4418
ARX4417
3
t
DTX
-
-
330
240
450
360
nS
nS
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION
Parameter
Differential Input Impedance
Differential Input Voltage Range
Input Common Mode Voltage Range
Common Mode Rejection Ratio
Condition
f = 1MHz
-
Note 1
Note 1
Symbol
Z
IN
V
IDR
V
ICR
CMRR
Min
10K
-
10
40
Typ
-
-
-
-
Max
-
40
-
-
Unit
Ω
Vp-p
Vp-p
dB
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)
V
S
= 0.4V
V
S
= 2.7V
-
-
Note 1
I
IL
I
IH
V
IL
V
IH
-
-
-
2.0
-
-0.2
1
-
-
-
-0.4
+40
0.7
-
150
mA
µA
V
V
nS
t
SD
THRESHOLD CHARACTERISTICS (SINEWAVE INPUT )
Internal Threshold Voltage
(referred to the bus) pins 6 and 11 grounded
100KHz -1MHz
V
TH
0.60
0.8
1.05
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)
Transmitter Standby
I
CC
I
EE
I
L
I
CC
I
EE
IL
I
CC
I
EE
I
L
I
CC
I
EE
I
L
30
50
25
50
70
25
75
45
25
120
140
25
60
75
35
85
105
35
110
130
35
160
180
35
25% duty cycle
mA
50% duty cycle
100% duty cycle
RECOMMENDED POWER SUPPLY VOLTAGE RANGE
+V
-V
Logic
Notes:1.
2.
3.
4.
+11.4 Volts to +15.75 Volts
-11.4 Volts to -15.75 Volts
+4.5 Volts to +5.5 Volts
Characteristics guaranteed by design, not production tested.
Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3KΩ minimum at 1MHz.
Specifications apply over the temperature range of -55°C to +125°C (Case Temperature) unless otherwise noted.
All typical values are measured at +25°C.
4
SCD4418 Rev C
t
f
*
90%
LAST BIT
Magnified View
OUTPUT OFFSET
*
6.5V P-P MIN
8.5V P-P MAX
0 Volts
0 volts
OUTPUT OFFSET
*
10%
2.5 µsec
t
r
*
* Rise and fall times measured at point A-A’ in Figure 5
*Offset measured at point A-A’ in Figure 5
FIGURE 3 – TRANSMITTER (TX) OUTPUT
WAVEFORM
FIGURE 4 – TRANSMITTER (TX) OUTPUT
OFFSET
V
P
-
P
@ B–B'
30
70Ω
70Ω
OUTPUT AMPLITUDE
27
24
21
18
15
12
TYPICAL
TX DATA OUT
N1:N2
B
52.5Ω
A
Ctr
tap
B’
A’
52.5Ω
N1:N3 for
stub
coupling
Slope = 3V
P
-
P
/Vdc
9
6
3
0
0
1
2
3
4
5
6
7
8
9
CONTROL VOLTAGE
Vdc
10
TX DATA OUT
RX DATA IN
RX DATA IN
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.71
Use Aeroflex 25T1553-1
FIGURE 5 – TYPICAL TRNSFORMER
CONNECTION
FIGURE 6 – TRANSMITTER (TX) OUTPUT
AMPLITUDE vs. CONTROL VOLTAGE
4.0
POWER DISSIPATION
WATTS
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
10
20
30
40
50
60
70
80
90 100
TYPICAL
DUTY CYCLE, PERCENT
FIGURE 7 – TYPICAL POWER DISSIPATION
vs. DUTY CYCLE
SCD4418 Rev C
5
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