CIRCUIT TECHNOLOGY
www.aeroflex.com
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4435N REV A 7/27/00
ARX 4435NFP
AEROFLEX

ARX 4435N
USA-88379
AEROFLEX
USA-88379
Features
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.
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,
ARX4435NFP / ARX4435N 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
+VTH
-VTH ~4K
~4K
–
+
–
+
ARX4435N Transceiver
for Macair H009 Specification
Preliminary