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eroflex Circuit T
– Data Bus Modules For The Future © SCD4418 REV B 10/18/99
EX THRESHOLD
EX THRESHOLD
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)
ARX 4418FP/4418 Transceivers
TX DATA IN
TX DATA IN
TX INHIBIT
DATA
SET INTERNAL
THRESHOLD
DATA
+5 V
-12V or -15V
RX DATA IN
RX DATA IN
+15V or +12V
STROBE
DATA
DATA
DRIVER
INPUT
AMP
SHAPING
V-
ACTIVE
FILTER
OUTPUT
STAGE
V+
COMP.
COMP.
Block Diagram (without Transformer)
TX DATA OUT
TX DATA OUT
AMP CONTROL
RX DATA OUT
RX DATA OUT
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-1553data 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
increasingthepulsedelaycharacteristics 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.
echnology
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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
Figure5.) When both DATA and
inputs are held low or high,
DATA
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
Figure 1 – Transmitter Logic Waveforms
priority over the condition of the data
inputs and disables the transmitter.
(See Transmitter Logic Waveforms,
Figure1.)
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
, and represent positive and
DATA
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.
DATA IN
IN
DATA
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: Waveforms shown are for normally low devices. For normally high receiver output
level
Aeroflex Circuit Technology SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
devices, the receiver outputs are swapped as shown by the dashed lines
2
Note overlap
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Aeroflex Circuit Technology SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Operating Case Temperature -55°C to +125°C
Storage Case Temperature -65°C to +150 °C
Power Supply Voltages ±15 V P.S. to ±18V MAX +5 V P.S. to +7V MAX
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
2.4 Watts
Power Dissipation for hottest die, (100% duty cycle) 600 mW
Maximum junction to case temperature rise for the
hottest device (100 % duty cycle)
36°C
Junction-Case, Thermal Resistance for hottest device 60°C/W
Electrical Characteristics, Transmitter Section
Input Characteristics, TX DATA in or TX DATA in
Parameter Condition Symbol Min Typ Max Unit
"0" Input Current VIN = 0.4 V IILD -0.2 -0.4 mA
"1" Input Current V
"0" Input Voltage V
"1" Input Voltage V
Inhibit Characteristics
"0" Input Current VIN = 0.4V IILI
"1" Input Current V
"0" Input Voltage V
IN = 2.7 V IIHD 1.0 40 µA
ILD 0.7 V
IHD 2.0 V
-0.2 -0.4 mA
-
IN = 2.7V IIHI - 1.0 40 µA
ILI - - 0.7 V
"1" Input Voltage V
Delay from TX inhibit, (0
output
Delay from TX inhibit, (1
→1) to inhibited
Note 1 t
→0) to active output Note 1 tDXON - 400 500 nS
Differential output noise, inhibit mode V
Differential output impedance (inhibited) Note 2 Z
IHI 2 - - V
DXOFF - 400 500 nS
NOI - 0.8 10 mV p-p
OI 2K - - Ω
Output Characteristics
Differential output level at point B–B’ Fig 5,
L = 140 Ω VO 28 30 36 V p-p
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)
R
R 200 250 300 nS
t
RL = 35
ARX4418
Ω VOS - - ±90 mV peak
- 330 450 nS
DTX
t
ARX4417 - - 360 nS
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Aeroflex Circuit Technology SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Electrical Characteristics, Receiver Section
Parameter Condition Symbol Min Typ Max Unit
Differential Input Impedance f = 1MHz ZIN 20K 100K W
Differential Input Voltage Range V
Input Common Mode Voltage Range Note 1 V
Common Mode Rejection Ratio Note 3 Note 1 CMRR 40 dB
IDR 40
ICR 10 V p-p
Strobe Characteristics (Logic "0" inhibits output)
"0" Input Current VS = 0.4 V IIL
"1" Input Current V
"0" Input Voltage V
"1" Input Voltage V
Strobe Delay (turn-on or turn-off) Note 1 t
S = 2.7V IIH - -1.0 +40 µA
SD - - 150 nS
IL - - 0.7 V
IH 2.0 - - V
-0.2 -0.4 mA
-
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 =
Ω
10K
TH 0.60 0.8 1.05 V p-p
V
RTH / VTH - 4000 - Ω / V p-p
Output Characteristics, RX DATA and RX DATA
I
"1" State
OH = -0.4
mA
OH 2.5 3.6 - V
V
V p-p
"0" State I
Delay, (average) from differential input zero
crossings to RX DATA and RX DATA
50% points
output
OL = 4 mA VOL - 0.35 0.5 V
Note 1 tDRX - 300 450 nS
Power Data
Power Supply Currents (Power supplies set at +15V, -15V, +5V)
Duty Cycle +V
Transmitter Standby 60mA 75mA
25% duty cycle Note 1 80mA 95mA
50% duty cycle 105mA 120mA
100% duty cycle Note 1 160mA 180mA
-V
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
5V
35mA
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Aeroflex Circuit Technology SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
Figure 3 – Transmitter (TX) Output Amplitude Figure 4 – Transmitter (TX) Output offset
POWER DISSIPATION
WATTS
OUTPUT AMPLITUDE
vs Control Voltage
VP-P @ B–B'
30
27
24
21
18
15
12
9
6
3
0
0 1 2 3 4 5 6 7 8 9 10
Typical
Slope = 3VP-P/Vdc
CONTROL VOLTAGE
Vdc
0 Volts
*Offset measured at point A-A’ in Fig 5
LAST BIT
Magnified View
OUTPUT OFFSET*
OUTPUT OFFSET
2.5 µsec
Figure 5 – Typical Transformer Connection Figure 6 – Power Dissipation vs Duty Cycle
70
Ω
70Ω
*
4.0
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
DUTY CYCLE, PERCENT
(TYPICAL)
B
B’
52.5Ω
Center
tap
52.5Ω
A
A’
N1:N3 for
stub
coupling
TX DATA OUT
TX DATA
OUT
RX DATA
RX DATA IN
IN
N1:N2
Transformer turns ratios:
N1:N2 = 1:1
N1:N3 = 1:0.707
Use Aeroflex 25T1553-1
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.
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Aeroflex Circuit Technology SCD4418 REV B 10/18/99 Plainview NY (516) 694-6700
CIRCUIT TECHNOLOGY
PLUG-IN PACKAGE
1.27 MAX
1.10
24
1.27
MAX
1
0.24
MIN
0.018 DIA.
±0.002
Notes
1. Dimensions shown are in inches.
2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row.
13
1.10
12
0.175
MAX
0.100
Pin Function
1 TX DATA OUT
2 TX DATA
3 TX GND (+5)
4 +15V (TX)
5 EXT. DATA THRES
6 INT. DATA THRES
7 RX DATA OUT
8 STROBE
9 RX GND (+5V)
10 RXDATA
11 INT DATA
12 EXT DATA THRES
13 +15V (RX)
14 AMP CONTROL
15 RX DATA IN
16 RX DATA
17 GND
18 CASE GND
19 -15V (RX)
20 +5V
21 TX INHIBIT
22 TX DATA IN
23 TX DATA
24 -15V(TX)
OUT
OUT
THRES
IN
IN
FLAT PACKAGE
1.27 MAX
Pin 1 & ESD
Designator
1.27
MAX
0.167 for Low Profile Flat Pack
0.200 for Std Flat Pack
0.400
MAX
0.080
±0.015
±0.002
2 sides
0.009
±0.002
0.017
0.10 Typ
Configurations and Ordering Information
Model No. DESC No. Receiver Data level Case Specs.
ARX 4418 5962-9208503HXX Normally Low Plug In 1553 & Macair
ARX 4418-FP 5962-9208503HYX Normally Low Flat Pack 1553 & Macair
ARX 4418-LPFP 5962-TBD Normally Low Low Profile Flat Pack 1553 & Macair
ARX 4417 5962-TBD Normally High Plug In 1553
ARX 4417-FP 5962-TBD Normally High Flat Pack 1553
ARX 4417-LPFP 5962-TBD Normally High Low Profile Flat Pack 1553
Specifications subject to change without notice.
Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11803
Toll Free Inquiries: 1-(800)THE-1553
6
Telephone: (516) 694-6700
FAX: (516) 694-6715
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