ARX4435N Transceiver
for Macair H009 Specification
Features
Preliminary
CIRCUIT TECHNOLOGY
www.aeroflex.com
• ARX4435N 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
• Low power 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 ARX4435N and
ARX4435NFP are new generation
monolithic
transceivers
which
provides compliance with Macair
H009 data bus requirements.
The ARX4435N and ARX4435NFP
perform the front-end analog function
of inputting and outputting data
through a transformer to a H009 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 ARX4435N
series active filter design has
additional high frequency roll-off to
provide the required low harmonic
distortion
waveform
without
increasing the delay characteristics
significantly.
Efficient transmitter electrical and
thermal design results in low internal
power dissipation and temperature
rise at high and low duty cycle.
X
LE
F
N
O
35
R
4 9
E
4 37
A
X 88
R -
A A
S
U
X
P
LE
F
F
N
O
5 9
R
3 7
E
44 3
A
X -88
R A
A S
U
TX DATA IN
TX DATA IN
DRIVER
SHAPING
TX INHIBIT
EXT THRESHOLD
DATA
DATA
SET INTERNAL
THRESHOLD
EXT THRESHOLD
DATA
+5 V
-12V or -15V
RX DATA IN
RX DATA IN
+15V or +12V
STROBE
INPUT
AMP
DATA
-V
TH
V-
+V
TH
~4K
+
–
~4K
–
ACTIVE
FILTER
+
ARX4435NFP / ARX4435N Transceivers
TX DATA OUT
OUTPUT
STAGE
V+
TX DATA OUT
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,
COMP.
RX DATA OUT
COMP.
RX DATA OUT
Block Diagram (without Transformer)
eroflex Circuit T
echnology
– Data Bus Modules For The Future © SCD4435N REV A 7/27/00
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
