October, 2010
Single-Rail ARINC 429 Differential Line Driver
PIN CONFIGURATION (TOP VIEW)
V+ 1
SLP 2
TX0IN 3
TX1IN 4
GND 5
CAP+ 6
CAP- 7
14 AMPB
13 TXBOUT
12 AMPA
11 TXAOUT
10 V-
9 GND
8 V+
HI-8592, HI-8593, HI-8594
GENERAL DESCRIPTION
The HI-8592 bus interface product is a silicon gate
CMOS device designed as a line driver in accordance
with the ARINC 429 bus specifications. The part in-
cludes a negative voltage converter allowing it to oper-
ate from a single +5V supply using only two external ca-
pacitors. The part also features high-impedance outputs
(tri-state) when both data inputs are taken high, allowing
multiple line drivers to be connected to a common bus.
The HI-8593 and HI-8594 are reduced pin count ver-
sions of HI-8592 which do not incorporate the negative
voltage converter. These devices are compatible with
Holt’s existing HI-8570 and HI-8571 respectively, with
the added advantage of the tri-state outputs. For even
smaller board footprint, versions are also available in
leadless, surface mount QFN-style packages.
Logic inputs feature built-in 2,000V minimum ESD input
protection as well as 5V or 3.3V logic level compatibility.
Products with 5 Ohm or 37.5 Ohm resistors in series
with each ARINC output are available to allow the use of
external resistors for lightning protection.
The HI-859x series of line drivers are intended for use
where logic signals must be converted to ARINC 429
levels such as when using an FPGA or the HI-3584
ARINC 429 Serial Transmitter/Dual Receiver.
The family of parts are available in Industrial -40 C to
o
o
o
+85 C, or Extended, -55 C to +125 C temperature rang-
es. Optional burn-in is available on the extended tem-
perature range.
o
HI-8592PS
14-PIN PLASTIC SMALL OUTLINE (ESOIC) NB
SLP 1
TX0IN 2
TX1IN 3
GND 4
8 V+
7 TXBOUT
6 TXAOUT
5 V-
HI-8593PS
8-PIN PLASTIC SMALL OUTLINE (ESOIC) NB
SLP 1
TX0IN 2
TX1IN 3
GND 4
8 V+
7 AMPB
6 AMPA
5 V-
HI-8594PS
8-PIN PLASTIC SMALL OUTLINE (ESOIC) NB
(See
page 9 for additional package pin configurations)
FEATURES
• Single +5V supply
• Negative voltage generated on-chip (HI-8592)
• Digitally selectable rise and fall times
• Tri-state Outputs
• Plastic 8 & 14-pin thermally enhanced SOIC
packages available
• 5 Ohm or 37.5 Ohm output resistance
• Industrial and Extended temperature ranges
• Burn-in available
HOLT INTEGRATED CIRCUITS
www.holtic.com
1
TX1IN
0
0
0
1
1
1
0
1
1
0
0
1
Table 1. Function Table
TX0IN
SLP
X
0
1
0
1
X
TXAOUT
0V
-5V
-5V
5V
5V
Hi-Z
TXBOUT
0V
5V
5V
-5V
-5V
Hi-Z
SLOPE
N/A
10μs
1.5μs
10μs
1.5μs
N/A
DS8592 Rev. B
10/10
HI-8592, HI-8593, HI-8594
BLOCK DIAGRAM
C
SUPPLY
SLP
TX0IN
TX1IN
V+
5V
AMPA
5V
ONE
ESD
PROTECTION
& VOLTAGE
TRANSLATION
NULL
ZERO
CONTROL
LOGIC
CURRENT
CONTROL
“A” SIDE
TXAOUT
5Ω
32.5Ω
-5V
5V
ONE
NULL
CURRENT
CONTROL
AMPB
“B” SIDE
5Ω
32.5Ω
TXBOUT
GND
V+
ZERO
CONTROL
LOGIC
-5V
CAP+
C
FLY
CAP-
-5V
Switched Capacitor
DC-DC Inverter
V-
C
OUT
Clock Generation
Figure 1. HI-8592 Block Diagram
HOLT INTEGRATED CIRCUITS
2
HI-8592, HI-8593, HI-8594
PIN DESCRIPTIONS
Table 2. Pin Descriptions
Pin
V+
SLP
TX0IN
TX1IN
GND
CAP+
CAP-
V-
TXAOUT
AMPA
TXBOUT
AMPB
Function
POWER
INPUT
INPUT
INPUT
POWER
ANALOG
ANALOG
POWER
OUTPUT
OUTPUT
OUTPUT
OUTPUT
Description
+5V power supply
Output slew rate control. High selects ARINC 429 high-speed. Low selects
ARINC 429 low-speed.
Data input zero
Data input one
Ground supply
Positive connection for external capacitor, C
FLY
Negative connection for external capacitor, C
FLY
-5V supply, may be connected to supply or used with on-chip negative sup-
ply converter
ARINC high output with 37.5 Ohms series resistance
ARINC high output with 5 Ohms series resistance
ARINC low output with 37.5 Ohms series resistance
ARINC low output with 5 Ohms series resistance
V+ = 5V
HI-3584A
TX0IN
TX1IN
C
SUPPLY
= 68µF
SLP
TXAOUT
TXBOUT
AMPA
AMPB
HI-8592
ARINC 429
Bus
CAP+
C
FLY
= 4.7µF
CAP- GND
-5V
C
OUT
= 47µF
Figure 2. Application Example
HOLT INTEGRATED CIRCUITS
3
HI-8592, HI-8593, HI-8594
FUNCTIONAL DESCRIPTION
Figure 1 is a block diagram of the line driver. The chip
requires a positive 5V supply at V+. The negative 5V
supply at V- may be from an external source or may be
provided using the on-chip negative rail generator by
connecting the two external capacitors, C
FLY
and C
OUT
.
Currents for slope control are set by on-chip resistors.
The TX0IN and TX1IN inputs receive logic signals from
a control transmitter chip such as the HI-3584. TX-
AOUT and TXBOUT hold each side of the ARINC bus
at Ground until one of the inputs becomes a One. If for
example 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
SLP pin. If the SLP pin is high, the capacitor is nominally
charged from 10% to 90% in 1.5μs. If SLP is low, the
rise and fall times are 10μs.
The reduced pin-count HI-8593 and HI-8594 require an
external -5V supply.
A unity gain buffer receives the internally generated
slopes and differentially drives the ARINC line. Cur-
rent is limited by the series output resistors at each pin.
There are no fuses at the outputs of the HI-859x family.
The HI-8593 has 37.5 ohms in series with each TXOUT
output and the HI-8594 has 5 ohms in series with each
AMP output. The AMP outputs are for applications
where external series resistance is required, typically
for lightning protection devices. Both output types are
available on the HI-8592. Holt Application Note AN-300
describes suitable lightning protection schemes.
All devices feature tri-stateable outputs to allow multiple
line drivers to be connected to the same ARINC 429
bus. Setting TX1IN and TX0IN both to a logic “1” puts
the outputs in the high-impedance state.
The HI-8592 family of line drivers are built using high-
speed CMOS technology. Care should be taken to en-
sure the V+ and V- supplies are locally decoupled to re-
duce noise. An application example is shown in Figure
2.
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
V+ ........................................................... +7V
V- ........................................................... -7V
DC Current per input pin ................................... +10mA
Power Dissipation at 25 C
plastic SOIC ........... 1.0W, derate 10mW/ C
ceramic DIP ......... 0.5W, derate 7mW/ C
Solder Temperature ......................... 275 C for 10sec
Storage Temperature ....................... -65 C to +150 C
o
o
o
o
o
o
RECOMMENDED OPERATING
CONDITIONS
Supply Voltages
V+ ................................... +4.85V to +5.25V
V- ................................... -5.25V to -4.85V
Temperature Range
Industrial Screening .............. -40 C to +85 C
Hi-Temp Screening .............. -55 C to +125 C
NOTE:
Stresses above absolute maximum ratings or outside
recommended operating conditions may cause permanent
damage to the device. These are stress ratings only. Opera-
tion at the limits is not recommended.
o
o
o
o
Note:
The HI-8592 family of drivers are available in small-foot-
print, thermally enhanced SOIC and QFN (chip-scale) pack-
ages. These packages include a metal heat sink located on
the bottom surface of the device. This heat sink should be
soldered down to the printed circuit board for optimum thermal
dissipation.
The heat sink is electrically isolated from the chip and can be
soldered to any ground or power plane.
HOLT INTEGRATED CIRCUITS
4
HI-8592, HI-8593, HI-8594
ELECTRICAL CHARACTERISTICS
Table 3. DC Electrical Characteristics
V+ = +5V, V- = -5V (HI-8593/4 only), T
A
= Operating Temperature Range (unless otherwise stated)
Parameters
Input Voltage (TX1IN, TX0IN, SLP)
High
Low
Input Current (TX1IN, TX0IN, SLP)
Source
Sink
ARINC Output Voltage (Differential)
one
zero
null
ARINC Output Voltage (Ref. to GND)
one or zero
null
Operating Supply Current
V+
GND
V-
ARINC Output Impedance
TXOUT pins
AMP pins
ARINC Output Tri-State Current
I
OZ
V- < V
OUT
< V+, T
A
= 125
o
C
TX0IN = TX1IN = V+
-1.0
I
DD
I
GND
I
EE
Z
OUT
37.5
5
0
+1.0
Ohms
Ohms
μA
V
DOUT
V
NOUT
no load & magnitude at pin
no load
SLP = V+
TX1IN & TX0IN = 0V: no load
TX1IN & TX0IN = 0V: no load
TX1IN & TX0IN = 0V: no load
-
-
-16
22
10
-10
28
16
-
mA
mA
mA
4.5
-0.25
5.0
0
5.5
0.25
V
V
V
DIFF1
V
DIFF0
V
DIFFN
no load; TXAOUT - TXBOUT
no load; TXAOUT - TXBOUT
no load; TXAOUT - TXBOUT
9
-11
-0.5
10
-10
0
11
-9
0.5
V
V
V
I
IH
I
IL
V
IN
= 0V
V
IN
= 5V
-
-
-
-
0.1
0.1
μA
μA
V
IH
V
IL
2.1
-
-
-
V+
0.5
V
V
Symbol
Test Conditions
Min
Typ
Max
Units
HOLT INTEGRATED CIRCUITS
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