CIRCUIT TECHNOLOGY
www.aeroflex.com
eroflex Circuit T
echnology
Data Bus Modules For The Future SCD4435 REV B 2/3/99
ARX 4435FP
USA-88379
AEROFLEX
ARX 4435
USA-88379
AEROFLEX
Features
ARX4435 Transceiver meets Macair H009 data bus
specifications
Transmitter can be used to drive clock signal line
Operates with 15 Volts to 12 Volts power supplies
Direct replacement for CT1641 and CT1816 devices
Voltage source output for higher bus drive power
Plug-in and flat package available
Monolithic construction using linear ASICs
Processed and screened to MIL-STD-883 specs
MIL-PRF-38534 compliant devices available
General Description
The Aeroflex Laboratories
Incorporated model ARX4435 and
ARX4435FP are new generation
monolithic transceivers which
provides compliance with Macair
H009 data bus requirements
The model ARX4435 and
ARX4435FP perform the front-end
analog function of inputting and out-
putting data through a transformer to
a H-009 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. The ARX4435
series active filter design has addi-
tional high frequency roll-off to pro-
vide the required low harmonic
distortion waveform without increas-
ing the delay characteristics signifi-
cantly.
Efficient transmitter electrical and
thermal design results in low internal
power dissipation and temperature
rise at high and low duty cycle.
Transmitter
The Transmitter section accepts
complementary TTL data at the input,
and when coupled to the data bus
with a 1:1 transformer, isolated on the
transceiver side with two 35 Ohm
fault isolation resistors, and loaded by
a 170 Ohm termination, the data bus
signal produced is 20 volts nominal
P-P at A-A'. (See Figure 5.) When
both DATA and DATA inputs are held
low or high, the transmitter output
impedance is low, and signal is
"removed" from the line. In addition,
ARX4435FP/4435 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
EXT THRESHOLD
DATA
SET INTERNAL
DATA
DATA
EXT THRESHOLD
DATA
+15V or +12V
V+
V-
THRESHOLD
+V
TH
-V
TH
~4K
~4K
+
+
ARX4435 Transceiver
for Macair H009 Specification
Aeroflex Circuit Technology
SCD4435 REV B 2/3/99 Plainview NY (516) 694-6700
2
an overriding "INHIBIT" input returns the output
impedance to a high state. 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 H 009 Macair speci-
fications. The transmitter may be safely operated for
an indefinite period with the output short circuited at
100% duty cycle.
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 repre-
sent 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.)
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
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
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
Rx DATA OUT
Rx DATA OUT
Notes: 1. Data and DATA inputs must be complementry waveforms or 50% duty cycle average, with no delays between them, and in the same state during
the off time (both high and low).
2. Region 1 ; no output signal, High Z state, (Receive Mode), Region 2; No Output signal, Low Z state, (Terminate Mode), Region 3, Transmitter signal
on, low Z.
Region 1 2 3
Aeroflex Circuit Technology
SCD4435 REV B 2/3/99 Plainview NY (516) 694-6700
3
Absolute Maximum Ratings
Operating case temperature
-55C to +125C
Storage case temperature
-65C 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
3.8 Watts
Maximum junction to case temperature rise
(100 % duty cycle)
38C
Junction-Case thermal resistance
10C/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
=0.4V
I
ILI
-0.2
-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
350
700
nS
Delay from TX inhibit, (1
0) to active output
Note 1
t
DXON
200
500
nS
Differential output noise, inhibit mode
V
NOI
0.8
10
mV p-p
Differential output impedance (inhibited)
Note 2
Z
OI
10K
Output Characteristics
Differential output level
R
L
=170
V
O
17
21
24
V p-p
Rise and fall times
(10% to 90% of p-p output)
t
r
200
300
nS
Output offset at point A-A on Figure 5, 2.5
S after midpoint crossing of the last bit
R
L
=170
V
OS
265
mV peak
Delay from 50% point of TX DATA or
TX DATA input to zero crossing of differen-
tial signal. (note1)
t
DTX
220
350
nS
Aeroflex Circuit Technology
SCD4435 REV B 2/3/99 Plainview NY (516) 694-6700
4
Electrical Characteristics, Receiver Section
Parameter
Condition
Symbol
Min
Typ
Max
Unit
Differential Input Impedance (Note 1)
f= 1MHz
Z
In
20K
Differential Input Voltage Range
V
IDR
40
V p-p
Input Common Mode Voltage Range
Note 1
V
ICR
10
V p-p
Common Mode Rejection Ratio
Point A-A on
Figure 5
CMRR
40
dB
Strobe Characteristics (Logic "O" 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 to GND
For 4435-701 only Pins 6 and 11 to GND
100KHz-1MHz
V
TH
0.60
1.2
0.80
1.6
1.15
2.3
V P-P
V P-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
)
1.65
1.95
2.24
V
P-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
t
DRX
275
450
nS
Power Data
Power Supply Currents (Power supplies set at +15V, -15V, +5V)
Duty Cycle
+V
-V
5V
TYP
MAX
TYP
MAX
TYP
MAX
Transmitter Standby
45mA
60mA
65mA
75mA
28mA
35mA
25% duty cycle
60mA
80mA
85mA
95mA
50% duty cycle
75mA
105mA
100mA
120mA
100% duty cycle
110mA
140mA
130mA
160mA
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
SCD4435 REV B 2/3/99 Plainview NY (516) 694-6700
5
Notes:
1. Characteristics guaranteed by design, not production tested.
2. Measured at 1mHz at point A-A', 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.
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 DI
SSI
P
A
T
I
O
N
W
A
TT
S
17V P-P MIN
24V 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'
TX DATA OUT
TX DATA OUT
RX DATA IN
RX DATA IN
35
35
Transformer turns ratio:
N1:N2 = 1:1
Use Aeroflex 25T1553-1
0 volts
Magnified View
170
(TYPICAL)
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