ARX4435 Transceiver
for Macair H009 Specification
Features
• ARX4435 Transceiver meets Macair H009 data bus
specifications
CIRCUIT TECHNOLOGY
www.aeroflex.com
• 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
General Description
The
Aeroflex
Laboratories
Incorporated model ARX4435 and
ARX4435FP are new generation
monolithic
transceivers
which
provides compliance with Macair
H009 data bus requirements
• Monolithic construction using linear ASICs
• Processed and screened to MIL-STD-883 specs
• MIL-PRF-38534 compliant devices available
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.
AEROFLEX
ARX 4435
USA-88379
AEROFLEX
ARX 4435FP
USA-88379
Efficient transmitter electrical and
thermal design results in low internal
power dissipation and temperature
rise at high and low duty cycle.
ARX4435FP/4435 Transceivers
Transmitter
TX DATA OUT
TX DATA OUT
TX DATA IN
TX DATA IN
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,
OUTPUT
STAGE
DRIVER
SHAPING
V+
TX INHIBIT
+VTH
-VTH
EXT THRESHOLD
DATA
–
+
~4K
~4K
+
–
DATA
DATA
RX DATA OUT
COMP.
SET INTERNAL
THRESHOLD
EXT THRESHOLD
V-
DATA
+5 V
-12V or -15V
RX DATA IN
RX DATA OUT
ACTIVE
FILTER
INPUT
AMP
COMP.
RX DATA IN
+15V or +12V
STROBE
Block Diagram (without Transformer)
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4435 REV B 2/3/99