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HI-8590 Datasheet(PDF) 2 Page - Holt Integrated Circuits

Part No. HI-8590
Description  ARINC 429 LINE DRIVER AND DUAL RECEIVER
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Maker  HOLTIC [Holt Integrated Circuits]
Homepage  http://www.holtic.com
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HI-8590 Datasheet(HTML) 2 Page - Holt Integrated Circuits

   
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HI-8590
FUNCTIONAL DESCRIPTION
Figure1 isa block diagram of the line driver. The +5V and
-5V levels are generated internally using on-chip zeners.
Currents for slope control are set by zener voltages across
on-chip resistors.
The TX0IN and TX1IN inputs receive logic signals from a
control transmitter chip such as the HI-6010 or HI-8282.
TXAOUT and TXBOUT hold each side of the ARINC bus at
Ground until one of the inputs becomesa One. If for exam-
ple TX1IN goes high,a charging path is enabled to 5V on an
“A” side internal capacitor while the “B” side is enabled to
-5V. The charging current is selected by the SLP1.5 pin. If
SLP1.5 is high, the capacitor is nominally charged from
10% to 90% in 1.5µs. If low, the rise and fall times are 10µs.
A unity gain buffer receives the internally generated slopes
and differentially drives the ARINC line. Current is limited
by the series output resistors at each pin. There are no
fuses in series with the ARINC outputs of the HI-8590 as
exists on the HI-8382.
The HI-8590 has 37.5 ohms in series with each ARINC out-
put just like the HI-8585. The HI-8586 has 10 ohms in se-
ries. The HI-8586 is used with the HI-8588 for applications
where more series resistance is added externally, typically
for lightning protection devices.
The line driver inputs TX1IN, TX0IN,& SLP1.5 must be tied
to eithera logic high or low if not used.
TXAOUT
CURRENT
CONTROL
-5V
5V
ONE
NULL
ZERO
CONTROL
LOGIC
TXBOUT
CURRENT
CONTROL
-5V
5V
SLP1.5
ESD
PROTECTION
AND
VOLTAGE
TRANSLATION
FIGURE 1- LINE DRIVER BLOCK DIAGRAM
37.5 OHMS
ONE
NULL
ZERO
CONTROL
LOGIC
“A” SIDE
“B” SIDE
FUNCTION TABLES
RINA
RINB
TESTA TESTB ROUTA ROUTB
-1.25V to 1.25V -1.25V to 1.25V
0
0
0
0
-3.25V to -6.5V
3.25V to 6.5V
0
0
0
1
3.25V to 6.5V
-3.25V to -6.5V
0
0
1
0
X
X
0
1
0
1
X
X
1
0
1
0
X
X
1
1
HI-Z
HI-Z
LINE RECEIVER
TX1IN
TX0IN
SLP1.5
0
0
X
0V
0V
0
1
0
-5V
5V
10µs
0
1
1
-5V
5V
1.5µs
1
0
0
5V
-5V
10µs
1
0
1
5V
-5V
1.5µs
1
1
X
0V
0V
N /A
SLOPE
N /A
TXAOUT
TXBOUT
LINE DRIVER
37.5 OHMS
LINE DRIVER
HOLT INTEGRATED CIRCUITS
2


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