ARX4810 & 4810FP Universal Dual
Transceivers
for MIL-STD-1553
& MACAIR A3818, A5690, A5232 & A4905
Features
• World’s smallest dual "Universal Transceiver"
0.3" X 1.2" Package
• Dual transceiver meets military data bus
requirements, MIL-STD-1553 and Macair specs
• Low power dissipation at full output power
• +5 / -15 Volt Power Supply Operation
• Voltage source output for higher bus drive power
• Monolithic construction using linear ASICs
• Processed and screened to MIL-STD-883 specs
• MIL-PRF-38534 Compliant Devices Available
• DESC SMD (Standard Military Drawing)
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology
Models ARX4810 and ARX4810FP
are new generation monolithic
transceivers which provide full
compliance with MIL-STD-1553 and
Macair data bus requirements in the
smallest packages with low power
consumption and two power supply
operation.
The dual channel Model ARX4810
and Model ARX4810FP perform the
front-end analog function of inputting
and outputting data through a
transformer to a MIL-STD-1553 or
Macair 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.
Each channel of the dual transceiver
is completely separate from the other
and fully independent. This includes
power leads as well as signal lines.
Hence, each channel may be
connected to a different data bus with
no interaction.
EX
0
F L 8 1 79
R O 4883
X
A E R SA-
AU
ARX4810 Dual Universal Transceiver
TX/RX
TX DATA IN
TX DATA IN
DRIVER
SHAPING
OUTPUT
STAGE
TX/RX
TX INHIBIT
RX DATA OUT
+5 V
-15 V to -12V
GROUND
REFERENCE
COMP.
Transmitter
INPUT
AMP
ACTIVE
FILTER
COMP.
RX DATA OUT
STROBE
Block Diagram (without transformer), 1/2 of unit shown
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
eroflex Circuit T
echnology
– Data Bus Modules For The Future © SCD4810 REV B 8/12/98
70 Ohm terminations plus additional
receivers, the data bus signal
produced is 7.5 volts nominal 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
Waveform, Figure 1.)
The transceiver 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 at 100% duty
cyclefor an indefinite period into a
short circuited, the 1553 or Macair
bus.
The pre-set internal thresholds will
detect data bus signals exceeding
1.150 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.)
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
Waveform Figure 2).
Figure 1 – Transmitter Logic Waveforms
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
NOTES:
1. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them.
2. 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
SCD4810 REV B 8/12/98
Plainview NY (516) 694-6700
Absolute Maximum Ratings
Operating case temperature
Storage case temperature
Negative Power supply Voltage
Positive Power Supply Voltage
Receiver differential input
Receiver input voltage (common mode)
Driver peak output current
Total package power dissipation over the full operating case
temperature rise
Maximum junction to case temperature rise for the hottest
device
Thermal resistance for the hottest device, junction to bottom of
case
-55°C to +125°C
-65°C to +150 °C
-15 V P.S. to -18V MAX
-0.3 V to +5.5 V
±10 V
±5 V
300 mA
4 Watts
(Note. Normal operation conditions require one transmitter on and the
other off at any given time, with a maximum dissipation of 3.2 watts.
)
6° C
3° C/W
Electrical Characteristics, Driver 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
IHD
V
IHD
Min
Typ
-0.25
1
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
2
240
210
2
7K
350
350
10
-0.25
1.0
-0.4
40
0.7
mA
µA
V
V
nS
nS
mV p-p
Ω
t
DXOFF
t
DXON
V
NOI
Z
OI
Note 1. Characteristics guaranteed by design, not production tested .
Output Characteristics
Differential 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 660µS message
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
R
L
= 35Ω
R
L
= 35Ω
V
O
t
R
6
200
6.8
240
7.7
300
V p-p
nS
V
OS
±90
mV peak
Note 1
t
DTX
260
350
nS
Note 2. Measured at 1MHz from bus side of transformer after contribution from transformer is accounted for.
Aeroflex Circuit Technology
3
SCD4810 REV B 8/12/98
Plainview NY (516) 694-6700
Electrical Characteristics, Receiver Section
Parameter
Differential Input Impedance
Differential Voltage Range
Input Common Mode Voltage Range
Common Mode Rejection Ratio Note 3
Note 1
Note 1
Condition
f = 1MHz
Sym
Z
IN
V
IDR
V
ICR
CMRR
Min
20K
Typ
Max
±4
Unit
Ω
V peak
V peak
dB
±2.5
40
Strobe Characteristics (Logic "O" inhibits output)
if not used, a 1K pullup to 5 V is recommended
"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
Vs = 2.7V
I
IL
I
IH
V
IL
V
IH
t
SD
2.0
10
78
-0.25
1
-0.4
+40
0.7
mA
µA
V
V
nS
Threshold Characteristics (Sinewave input )
Input Threshold Voltage
(referred to the bus)
"1" State
"0" State
Delay, (average) from differential input zero cross-
ings to RX DATA and RX DATA output 50% points
100KHz-1MHz
VTH
0.60
0.8
1.15
V
P-P
Output Characteristics, RX DATA and RX DATA
I
OH
= -0.4 mA
I
OL
= 4 mA
V
OH
V
OL
2.5
3.4
0.3
280
0.5
450
V
V
nS
t
DRX
Power Data
Maximum Currents, per channel (Power supplies used are -15V, and +5V)
Duty Cycle
-V
+V and Logic
Transmitter Standby
25% duty cycle, Note 1
50% duty cycle
100% duty cycle, Note 1
42 mA
85mA
105 mA
140 mA
48 mA
90 mA
110 mA
145 mA
Power supply Voltages
-V
Logic and +V
-14.25 Volts to -15.75 Volts
4.5 Volts to 5.5 Volts
Note 3. Measured at the bus side of the transformer, including the contribution from the transformer.
Note 4. V
cc
= 5 Volts ±0.1 V, for all measurements unless otherwise specified.
Note 5. Specifications apply over the case temperature range of -55°C to +125°C unless otherwise specfied.
Note 6. All typical values are measured at +25°C
Note 7. A 1uf, 10 Volt capacitor is required on the TX/RX terminal for each transceiver as shown in Figure 5. A Sprague
194D type (.05" W x .10" L x .05" H ) is suggested.
Aeroflex Circuit Technology
4
SCD4810 REV B 8/12/98
Plainview NY (516) 694-6700
Figure 3 – Transmitter (TX) Output Wave form
t
f
*
90%
Figure 4 – Transmitter (TX) Output offset
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
*
*Offset measured at point A-A’ in Fig 5
* Rise and fall times measured at point A-A’ in Fig 5
Figure 5 – Typical Transformer connection
70Ω
70Ω
Figure 6 – Power Dissipation vs. Duty Cycle
(per channel)
B
A
Ctr
tap
N1:N3 for
stub
coupling
A’
52.5Ω
POWER DISSIPATION
WATTS
TX DATA OUT
D.U.T
1uf, 10 V
N1:N2
+
52.5Ω
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
TYPICAL
B’
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
0
0
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE, PERCENT
Configurations and Ordering Information
Model No.
ARX4810
ARX4810-201-1
ARX4810-201-2
ARX4810-201-3
ARX4810-203-1
ARX4810-203-2
ARX4810-203-3
ARX4811
ARX4811-2
Aeroflex Circuit Technology
DESC No.
5962-TBA
5962-9550501HXC
5962-9550501HXA
5962-9550501HXA or C
Receiver Data level
Normally High
Normally High
Normally High
Normally High
Normally High
Normally High
Normally High
Normally Low
Normally Low
5
Case
Plug-In
Flat Pkg (.175 Lead)
Flat Pkg (.175 Lead)
Flat Pkg (.175 Lead)
Flat Pkg (.300 Lead)
Flat Pkg (.300 Lead)
Flat Pkg (.300 Lead)
Plug-In
Flat Package
SCD4810 REV B 8/12/98
Configuration
Dual
Dual
Dual
Dual
Dual
Dual
Dual
Dual
Dual
Plainview NY (516) 694-6700
5962-9550501HYC
5962-9550501HYA
5962-9550501HYA or C
5962-TBA
5962-TBA
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