hi-8590 Holt Integrated Circuits, Inc., hi-8590 Datasheet - Page 2

• Manufacturer Part Number: hi-8590
• Description: Arinc Line Driver Dual Receiver
• Manufacturer: Holt Integrated Circuits, Inc.

FUNCTION TABLES
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
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.
LINE DRIVER
TX1IN
0
0
0
1
1
1
TX0IN
0
1
1
0
0
1
SLP1.5
X
X
0
1
0
1
LINE DRIVER
TRANSLATION
PROTECTION
VOLTAGE
TXAOUT
ESD
AND
-5V
-5V
0V
5V
5V
0V
TXBOUT
FIGURE 1 - LINE DRIVER BLOCK DIAGRAM
-5V
-5V
0V
5V
5V
0V
CONTROL
CONTROL
LOGIC
LOGIC
NULL
ZERO
NULL
ZERO
ONE
ONE
HOLT INTEGRATED CIRCUITS
SLOPE
1.5µs
1.5µs
10µs
10µs
N /A
N /A
SLP1.5
-5V
-5V
5V
5V
HI-8590
CURRENT
CONTROL
CURRENT
CONTROL
2
“B” SIDE
“A” SIDE
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 either a logic high or low if not used.
-1.25V to 1.25V -1.25V to 1.25V
-3.25V to -6.5V
3.25V to 6.5V
RINA
X
X
X
-3.25V to -6.5V
3.25V to 6.5V
RINB
LINE RECEIVER
37.5 OHMS
37.5 OHMS
X
X
X
TESTA TESTB ROUTA ROUTB
0
0
0
0
1
1
TXAOUT
TXBOUT
0
0
0
1
0
1
HI-Z
0
0
1
0
1
HI-Z
0
1
0
1
0