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Holt Integrated Circuits
Holt Integrated Circuits

HI-8585 Datasheet Preview

HI-8585 Datasheet

(HI-8585 / HI-8586) ARINC 429 LIN DRIVER

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HI-8585 pdf
January 2001
HI-8585, HI-8586
ARINC 429 LINE DRIVER
DESCRIPTION
The HI-8585 and HI-8586 are CMOS integrated circuits
designed to directly drive the ARINC 429 bus in an 8 pin
package. Two logic inputs control a differential voltage
between the output pins producing a +10 volt One, a
-10 volt Zero, and a 0 volt Null.
The CMOS/TTL control inputs are translated to ARINC
specified amplitudes using on board zeners. A logic input
is provided to control the slope of the differential output
signal. Timing is set by on-chip resistor and capacitor and
tested to be within ARINC requirements.
The HI-8585 has 37.5 ohms in series with each line driver
output. The HI-8586 provides the option to bypass most
of the output resistance so that series protection circuits
can add their resistances.
The HI-8585 or the HI-8586 along with the HI-8588 line
receiver offer the smallest options available to get on and
off the ARINC bus.
FEATURES
! Direct ARINC 429 line driver
interface in a small package
! On-chip zener to set output levels
! On-chip line driver slope control and
selection by logic input
! Low current 12 to 15 volt supplies
! CMOS / TTL logic pins
! Plastic and ceramic package options -
surface mount and DIP
! Themally enhanced SOIC packages
! Mil processing available
PIN CONFIGURATION
SLP1.5 1
TX0IN 2
TX1IN 3
GND 4
8 V+
7 TXBOUT
6 TXAOUT
5 V-
SUPPLY VOLTAGES
V+ = 12V to 15V
V- = -12V to -15V
FUNCTION TABLE
TX1IN
0
0
0
1
1
1
TX0IN SLP1.5 TXAOUT
0X
0V
1 0 -5V
1 1 -5V
0 0 5V
0 1 5V
1X
0V
TXBOUT
0V
5V
5V
-5V
-5V
0V
SLOPE
N /A
10µs
1.5µs
10µs
1.5µs
N /A
PIN DESCRIPTION TABLE
P IN SYMBOL
FUNCTION
DESCRIP T ION
1 SLP1.5
LOGIC INPUT
CMOS OR TTL, V+IS OK
2 TX0IN
LOGIC INPUT
CMOS OR TTL
3 TX1IN
LOGIC INPUT
CMOS OR TTL
4 GND
POWER
GROUND
5 V-
POWER
-12 TO -15 VOLTS
6 TXAOUT LOGIC OUTPUT LINE DRIVER TERMINAL A
7 TXBOUT LOGIC OUTPUT LINE DRIVER TERMINAL B
8 V+
POWER
+12 TO +15 VOLTS
(DS8585 Rev. D)
HOLT INTEGRATED CIRCUITS
1
01/01



Holt Integrated Circuits
Holt Integrated Circuits

HI-8585 Datasheet Preview

HI-8585 Datasheet

(HI-8585 / HI-8586) ARINC 429 LIN DRIVER

No Preview Available !

HI-8585 pdf
HI-8585, HI-8586
FUNCTIONAL DESCRIPTION
Figure 1 is a 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 becomes a 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
the SLP1.5 pin is high, the capacitor is nominally charged
from 10% to 90% in 1.5µs. If SLP1.5 is 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 at the outputs of the HI-8585 as exists on the HI-8382.
The HI-8585 has 37.5 ohms in series with each output. The
HI-8586 has 10 ohms in series. The HI-8586 is for applica-
tions where more series resistance is added externally,
typically for lightning protection devices.
ESD
PROTECTION
AND
VOLTAGE
TRANSLATION
ONE
NULL
ZERO
CONTROL
LOGIC
5V “A” SIDE
CURRENT
CONTROL
-5V
SLP1.5
HI-8585 = 37.5 OHMS
HI-8556 = 10.0 OHMS
TXAOUT
ONE
NULL
ZERO
CONTROL
LOGIC
5V “B” SIDE
CURRENT
CONTROL
-5V
HI-8585 = 37.5 OHMS
HI-8586 = 10.0 OHMS
FIGURE 1 - LINE DRIVER BLOCK DIAGRAM
TXBOUT
APPLICATION INFORMATION
Figure 2 shows a possible application
of the HI-8585/86 interfacing an ARINC
transmit channel from the HI-6010.
2
8
4
3
5
1
6
7
1
6
7
8
2
3
45
FIGURE 2 - APPLICATION DIAGRAM
HOLT INTEGRATED CIRCUITS
2


Part Number HI-8585
Description (HI-8585 / HI-8586) ARINC 429 LIN DRIVER
Maker Holt Integrated Circuits
Total Page 7 Pages
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