HI-8585, HI-8586
ARINC 429 LINE DRIVER
August 2006
DESCRIPTION
PIN CONFIGURATION
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.
SLP1.5
8
7
6
5
V+
1
TX0IN 2
TX1IN 3
GND 4
TXBOUT
TXAOUT
V-
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 withinARINC requirements.
SUPPLY VOLTAGES
The HI-8585 has 37.5 ohms in series with each line driver
output. The HI-8586 provides the option to bypass part of
the output resistance so that external series protection
circuits can add their resistances.
V+ = 12V to 15V
V- = -12V to -15V
The HI-8585 or the HI-8586 along with the HI-8588 line
receiver offer the smallest options available to get on and
off theARINC bus.
FUNCTION TABLE
TX1IN TX0IN SLP1.5
TXAOUT
0V
TXBOUT
0V
SLOPE
N/A
0
0
0
1
1
1
0
1
1
0
0
1
X
0
1
0
1
X
FEATURES
-5V
5V
10ms
1.5ms
10ms
1.5ms
N/A
-5V
5V
! Direct ARINC 429 line driver interface
in a small package
5V
-5V
5V
-5V
0V
0V
! On-chip zener to set output levels
! On-chip line driver slope control and
selection by logic input
PIN DESCRIPTION TABLE
! Low current 12 to 15 volt supplies
! CMOS / TTL logic pins
PIN SYMBOL
FUNCTION
LOGIC INPUT
LOGIC INPUT
LOGIC INPUT
POWER
DESCRIPTION
1
2
3
4
5
6
7
8
SLP 1.5
TX0IN
TX1IN
GND
CMOS OR TTL, V+ IS OK
CMOS OR TTL
CMOS OR TTL
! Plastic and ceramic package options -
GROUND
surface mount and DIP
V-
POWER
-12 TO -15 VOLTS
LINE DRIVER TERMINAL A
LINE DRIVER TERMINAL B
+12 TO +15 VOLTS
TXAOUT
TXBOUT
V+
OUTPUT
! Thermally enhanced SOIC packages
! Mil processing available
OUTPUT
POWER
HOLT INTEGRATED CIRCUITS
www.holtic.com
(DS8585 Rev. J)
08/06
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
