HI-8585, HI-8586
ARINC 429 LINE DRIVER
January 2001
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 V+
1
TX0IN 2
TX1IN 3
GND 4
7 TXBOUT
6 TXAOUT
5 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 within ARINC requirements.
SUPPLY VOLTAGES
The HI-8585 has 37.5 ohms in series with each line driver
output. The HI-8586 pr ovides the option to bypass most
of the output resistance so that 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 the ARINC bus.
FUNCTION TABLE
TXAOUT TXBOUT
SLOPE
TX1IN TX0IN SLP1.5
0
0
0
1
1
1
0
1
1
0
0
1
X
0
1
0
1
X
0V
-5V
-5V
5V
0V
5V
N /A
10µs
1.5µs
10µs
1.5µs
N /A
FEATURES
5V
! Direct ARINC 429 line driver
interface in a small package
-5V
-5V
0V
5V
! On-chip zener to set output levels
0V
! 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
SYMBOL
FUNCTION
DESCRIPTION
P IN
1
2
3
4
5
6
7
8
SLP1.5
TX0IN
TX1IN
GND
LOGIC INPUT
LOGIC INPUT
LOGIC INPUT
POWER
CMOS OR TTL, V+ IS OK
CMOS OR TTL
! Plastic and ceramic package options -
surface mount and DIP
CMOS OR TTL
GROUND
! Themally enhanced SOIC packages
! Mil processing available
V-
POWER
-12 TO -15 VOLTS
LINE DRIVER TERMINAL A
LINE DRIVER TERMINAL B
+12 TO +15 VOLTS
TXAOUT
TXBOUT
V+
LOGIC OUTPUT
LOGIC OUTPUT
POWER
HOLT INTEGRATED CIRCUITS
1
(DS8585 Rev. D)
01/01