ARX4435 Transceiver
for Macair H009 Specification
Features
鈥?ARX4435 Transceiver meets Macair H009 data bus
specifications
鈥?Transmitter can be used to drive clock signal line
鈥?Operates with 鹵15 Volts to 鹵12 Volts power supplies
鈥?Direct replacement for CT1641 and CT1816 devices
鈥?Voltage source output for higher bus drive power
鈥?Plug-in and flat package available
鈥?Monolithic construction using linear ASICs
鈥?Processed and screened to MIL-STD-883 specs
鈥?MIL-PRF-38534 compliant devices available
CIRCUIT TECHNOLOGY
www.aeroflex.com
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.
X
LE
F 5
O 43 9
R 4 37
E
A RX 88
A A-
S
U
X
LE P
F 5F
O 3 9
R 4 7
E 4 3
A RX 88
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
+
鈥?/div>
~4K
鈥?/div>
ACTIVE
FILTER
+
ARX4435FP/4435 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鈥? (See Figure 5.) When
both DATA and DATA inputs are held
low or high, the transmitter output
impedance is low, and signal is
鈥渞emoved鈥?from the line. In addition,
COMP.
RX DATA OUT
COMP.
RX DATA OUT
Block Diagram (without Transformer)
eroflex Circuit T
echnology
鈥?Data Bus Modules For The Future 漏 SCD4435 REV B 2/3/99
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