CIRCUIT TECHNOLOGY
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EROFLEX CIRCUIT TECHNOLOGY - Data Bus Modules for the Future SCD4404 REV D 10/27/99
Features
ARX4404 Transceiver meets MIL-STD-1553A & B,
Macair A3818, A4905, A5232 and A5690 specs
ARX4407 Transceiver meets MIL-STD-1553 specs
Bipolar Supply 15V to 12V, Logic Supply +5V
Direct replacement for CT3231 and CT3232
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
Low receiver data level versions, ARX4440, 4467
Processed and screened to MIL-STD-883 specs
DESC SMD (Standard Military Drawing)
MIL-PRF-38534 Compliant Devices Available
General Description
The Aeroflex Laboratories
transceiver models ARX4404 and
ARX4407 are new generation
monolithic transceivers which provide
full compliance with Macair and
MIL-STD-1553 data bus
requirements
The model ARX4404 and model
ARX4407 perform the front-end
analog function of inputting and
outputting data through a transformer
to a MIL-STD-1553 or Macair data
bus. The ARX4404 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
ARX4407 is compatible with
MIL-STD-1553A and 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 ARX4404
series 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 well as low duty cycles.
An optional receiver input threshold
adjustment can be accomplished by
the use of the "Set Internal
Threshold" terminals.
Transmitter
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
ARX4404FP/4404 Transceivers
Block Diagram (without Transformer)
SHAPING
OUTPUT
STAGE
COMP.
COMP.
ACTIVE
FILTER
INPUT
AMP
DRIVER
TX DATA IN
TX DATA IN
TX INHIBIT
+5 V
RX DATA IN
RX DATA IN
STROBE
TX DATA OUT
TX DATA OUT
RX DATA OUT
RX DATA OUT
-12V or -15V
EX THRESHOLD
DATA
SET INTERNAL
DATA
DATA
EX THRESHOLD
DATA
+15V or +12V
V+
V-
THRESHOLD
ARX4404 & 4407 Transceivers for
MACAIR A3818, A5690, A5232, A4905
& MIL-STD-1553
Aeroflex Circuit Technology
SCD4404 REV D 10/27/99 Plainview NY (516) 694-6700
2
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
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.
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 Ohm
pull-up to +5 Volts is
recommended.
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
Notes:
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
Figure 2 - Receiver Logic Waveforms
Note overlap
NOTE
:
Waveforms shown are for normally low devices. For normally high receiver output
devices, the receiver outputs are swapped as shown by the dashed lines
level
LINE TO LINE
INPUT
DATA OUT
DATA OUT
1. Line to line waveforms illustrate Macair signals, MIL-STD-1553 signals are trapezoidal
Aeroflex Circuit Technology
SCD4404 REV D 10/27/99 Plainview NY (516) 694-6700
3
Absolute Maximum Ratings
Operating case temperature
-55C to +125C
Storage Case Temperature
-65C to +150C
Power Supply Voltages
16 V
+7 V
Logic Input Voltage
-0.3 V to +5.5 V
Receiver Differential Input
40 V
Receiver Input Voltage (Common Mode)
10V
Driver Peak Output Current
300 mA
Total Package Power Dissipation over the Full
Operating Case Temperature Range
3.6 Watts
Maximum Junction to Case Temperature
18C
Junction-Case, Thermal Resistance
5C/W
Electrical Characteristics, Transmitter Section
Input Characteristics, TX DATA IN or TX DATA IN
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
V
IN
= 0.4 V
I
ILD
-
-0.2
-0.4
mA
"1" Input Current
V
IN
= 2.7 V
I
IHD
-
1.0
40
A
"0" Input Voltage
V
IHD
-
-
0.7
V
"1" Input Voltage
V
IHD
2.0
-
-
V
Inhibit Characteristics
"0" Input Current
V
IN
= 0.4 V
I
ILI
-
-0.2
-0.4
mA
"1" Input Current
V
IN
= 2.7 V
I
IHI
-
1.0
40
A
"0" Input Voltage
V
ILI
-
-
0.7
V
"1" Input Voltage
V
IHI
2
-
-
V
Delay from TX inhibit(01) to inhibited output
Note 1
t
DXOFF
-
300
450
nS
Delay from TX inhibit, (10) to active output
Note 1
t
DXON
-
300
450
nS
Differential output noise, inhibit mode
V
NOI
-
0.8
10
mVp-p
Differential output impedance (inhibited)
Note 2
Z
OI
2K
-
-
Output Characteristics
Differential output level
R
L
= 35
V
O
7
7.5
9
Vp-p
Rise and fall times
(10% to 90% of p-p output)
ARX4404
t
R
& t
F
200
250
300
nS
ARX4407
100
180
300
Output offset at point A-A' on Fig 5., 2.5 S
after midpoint crossing of the parity bit of the
last word of a 660 S message
R
L
= 35
V
OS
90
mVpeak
Delay from 50% point of TX DATA or
TX DATA input to zero crossing of
differential signal. (Note 1)
ARX4404
t
DTX
240
300
nS
ARX4407
150
300
nS
Aeroflex Circuit Technology
SCD4404 REV D 10/27/99 Plainview NY (516) 694-6700
4
Electrical Characteristics, Receiver Section
Parameter
Condition
Symbol
Min
Typ
Max
Unit
Differential Input Impedance
f = 1MHz
Z
IN
20K
100K
Differential Input Voltage Range
V
IDR
-
-
40
Vp-p
Input Common Mode Voltage Range
Note 1
V
ICR
10
-
-
Vp-p
Common Mode Rejection Ratio Note 3
Note 1
CMRR
40
-
-
dB
Strobe Characteristics (Logic "0" Inhibits Output)
"0" Input Current
V
S
= 0.4 V
I
IL
-
-0.2
-0.4
mA
"1" Input Current
V
S
= 2.7 V
I
IH
-
-1.0
+40
A
"0" Input Voltage
V
IL
-
-
0.7
V
"1" Input Voltage
V
IH
2.0
-
-
V
Strobe Delay (Turn-on or Turn-off)
Note 1
t
SD
-
-
150
nS
Threshold Characteristics (Sinewave Input )
Internal Threshold Voltage
(Referred to the bus) Pins 6 and 11 grounded
100KHz-1MHz
V
TH
0.60
0.80
1.15
Vp-p
External Threshold
Pins 6 & 11 open,
Pin 5 with a 5.9K resistor to GND,
Pin 12 with a 6.65K resistor to GND,
1MHZ Sinewave applied to point A-A"
V
TH(EXT)
1.5
1.9
2.3
Vp-p
Output Characteristics, RX DATA and RX DATA
"1" State
I
OH
= -0.4 mA
V
OH
2.5
3.6
-
V
"0" State
I
OL
= 4 mA
V
OL
-
0.35
0.5
V
Delay (average), from differential input zero
crossings to RX DATA and RX DATA output
50% points
Note 1
t
DRX
-
300
450
nS
Power Data
Power Supply Currents (Power Supplies set at +15V, -15V, +5V)
Transmitter Standby
I
CC
I
EE
I
L
30
50
25
60
75
35
mA
25% duty cycle
I
CC
I
EE
I
L
50
70
25
85
105
35
50% duty cycle
I
CC
I
EE
I
L
75
45
25
110
130
35
100% duty cycle
I
CC
I
EE
I
L
120
140
25
160
180
35
Recommended Power Supply Voltage Range
+V
+11.4 Volts to +15.75 Volts
-V
-11.4 Volts to -15.75 Volts
Logic
+4.5 Volts to +5.5 Volts
Aeroflex Circuit Technology
SCD4404 REV D 10/27/99 Plainview NY (516) 694-6700
5
Notes:
1. Characteristics guaranteed by design, not production tested.
2. Measured from 75KHz to 1MHz at point A-A' with transformer self impedance of 3K
minimum, power on or off.
3. Specifications apply over the temperature range of -55C to +125C (case temperature)
unless otherwise noted.
4. All typical values are measured at +25C
The information contained in this data sheet is believed to be accurate; however, Aeroflex Circuit Technology.
assumes no responsibility for its use, and no licence or rights are granted by implication or otherwise in connection
therewith.
Figure 3 - Transmitter (TX) Output Wave form
Figure 4 - Transmitter (TX) Output offset
Figure 5 - Typical Transformer connection
Figure 6 - Power Dissipation vs. Duty Cycle
0 10 20 30 40 50 60 70 80 90 100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
DUTY CYCLE, PERCENT
P
O
W
E
R
D
I
S
S
I
P
A
T
I
O
N
W
A
T
T
S
6.5V P-P MIN
8.5V P-P MAX
90%
10%
t
r
*
t
f
*
* Rise and fall times measured at point A-A' in Fig 5
0 Volts
OUTPUT OFFSET
*
OUTPUT OFFSET
*
Last Bit
2.5 sec
*Offset measured at point A-A' in Fig 5
N1:N2
A
A'
B'
B
TX DATA OUT
TX DATA OUT
RX DATA IN
RX DATA IN
70
70
52.5
52.5
Ctr
tap
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.71
Use Aeroflex 25T1553-1
N1:N3 for
stub
coupling
0 Volts
Magnified View
(TYPICAL)
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