CIRCUIT TECHNOLOGY
www.aeroflex.com
AEROFLEX
ARX 4810
USA-88379
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)
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.
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
ARX4810 Dual Universal Transceiver
SHAPING
OUTPUT
STAGE
COMP.
COMP.
REFERENCE
ACTIVE
FILTER
INPUT
AMP
DRIVER
TX DATA IN
TX DATA IN
TX INHIBIT
+5 V
STROBE
TX/RX
TX/RX
RX DATA OUT
RX DATA OUT
-15 V to -12V
GROUND
ARX4810 & 4810FP Universal Dual
Transceivers
for
MIL-STD-1553
& MACAIR A3818, A5690, A5232 & A4905
Block Diagram (without transformer), 1/2 of unit shown
eroflex Circuit T
echnology
Data Bus Modules For The Future SCD4810 REV B 8/12/98
Aeroflex Circuit Technology
SCD4810 REV B 8/12/98 Plainview NY (516) 694-6700
2
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.
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).
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.)
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 1 Transmitter Logic Waveforms
Figure 2 Receiver Logic Waveforms
Note overlap
NOTE
:
Waveforms shown are for normally low devices. For normally high receiver output
the receiver outputs are swapped as shown by the dashed lines.
,
level devices,
LINE TO LINE
INPUT
DATA OUT
DATA OUT
Aeroflex Circuit Technology
SCD4810 REV B 8/12/98 Plainview NY (516) 694-6700
3
Note 1. Characteristics guaranteed by design, not production tested .
Note 2. Measured at 1MHz from bus side of transformer after contribution from transformer is accounted for.
Absolute Maximum Ratings
Operating case temperature
-55C to +125C
Storage case temperature
-65C to +150 C
Negative Power supply Voltage
-15 V P.S. to -18V MAX
Positive Power Supply Voltage
-0.3 V to +5.5 V
Receiver differential input
10 V
Receiver input voltage (common mode)
5 V
Driver peak output current
300 mA
Total package power dissipation over the full operating case
temperature rise
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.
)
Maximum junction to case temperature rise for the hottest
device
6 C
Thermal resistance for the hottest device, junction to bottom of
case
3 C/W
Electrical Characteristics, Driver 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
-0.25
-0.4
mA
"1" Input Current
V
IN
= 2.7 V
I
IHD
1
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
= 0.4V
I
ILI
-0.25
-0.4
mA
"1" Input Current
V
IN
= 2.7V
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,(0
1) to inhibited output
Note 1
t
DXOFF
240
350
nS
Delay from TX inhibit, (1
0) to active output
Note 1
t
DXON
210
350
nS
Differential output noise, inhibit mode
V
NOI
2
10
mV p-p
Differential output impedance (inhibited)
Note 2
Z
OI
7K
Output Characteristics
Differential output level
R
L
= 35
V
O
6
6.8
7.7
V p-p
Rise and fall times
(10% to 90% of p-p output)
t
R
200
240
300
nS
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 660S message
R
L
= 35
V
OS
90
mV peak
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
Note 1
t
DTX
260
350
nS
Aeroflex Circuit Technology
SCD4810 REV B 8/12/98 Plainview NY (516) 694-6700
4
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 -55C to +125C unless otherwise specfied.
Note 6. All typical values are measured at +25C
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.
Electrical Characteristics, Receiver Section
Parameter
Condition
Sym
Min
Typ
Max
Unit
Differential Input Impedance
f = 1MHz
Z
IN
20K
Differential Voltage Range
V
IDR
4
V peak
Input Common Mode Voltage Range
Note 1
V
ICR
2.5
V peak
Common Mode Rejection Ratio Note 3
Note 1
CMRR
40
dB
Strobe Characteristics (Logic "O" inhibits output)
if not used, a 1K pullup to 5 V is recommended
"0" Input Current
V
S
= 0.4 V
I
IL
-0.25
-0.4
mA
"1" Input Current
Vs = 2.7V
I
IH
1
+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
10
78
nS
Threshold Characteristics (Sinewave input )
Input Threshold Voltage
(referred to the bus)
100KHz-1MHz
VTH
0.60
0.8
1.15
V
P-P
Output Characteristics, RX DATA and RX DATA
"1" State
I
OH
= -0.4 mA
V
OH
2.5
3.4
V
"0" State
I
OL
= 4 mA
V
OL
0.3
0.5
V
Delay, (average) from differential input zero cross-
ings to RX DATA and RX DATA output 50% points
t
DRX
280
450
nS
Power Data
Maximum Currents, per channel (Power supplies used are -15V, and +5V)
Duty Cycle
-V
+V and Logic
Transmitter Standby
42 mA
48 mA
25% duty cycle, Note 1
85mA
90 mA
50% duty cycle
105 mA
110 mA
100% duty cycle, Note 1
140 mA
145 mA
Power supply Voltages
-V
-14.25 Volts to -15.75 Volts
Logic and +V
4.5 Volts to 5.5 Volts
Aeroflex Circuit Technology
SCD4810 REV B 8/12/98 Plainview NY (516) 694-6700
5
Configurations and Ordering Information
Model No.
DESC No.
Receiver Data level
Case
Configuration
ARX4810
5962-TBA
Normally High
Plug-In
Dual
ARX4810-201-1
5962-9550501HXC
Normally High
Flat Pkg (.175 Lead)
Dual
ARX4810-201-2
5962-9550501HXA
Normally High
Flat Pkg (.175 Lead)
Dual
ARX4810-201-3
5962-9550501HXA or C
Normally High
Flat Pkg (.175 Lead)
Dual
ARX4810-203-1
5962-9550501HYC
Normally High
Flat Pkg (.300 Lead)
Dual
ARX4810-203-2
5962-9550501HYA
Normally High
Flat Pkg (.300 Lead)
Dual
ARX4810-203-3
5962-9550501HYA or C
Normally High
Flat Pkg (.300 Lead)
Dual
ARX4811
5962-TBA
Normally Low
Plug-In
Dual
ARX4811-2
5962-TBA
Normally Low
Flat Package
Dual
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
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
(per channel)
D.U.T
+
1uf, 10 V
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 DI
S
S
I
P
A
T
I
O
N
W
A
TTS
TYPICAL
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