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HI-8570, HI-8571
August 2006
+/- 5V Supply, ARINC 429 LINE DRIVER
PIN CONFIGURATION
SLP1.5 1 TX0IN 2 TX1IN 3 GND 4
DESCRIPTION
The HI-8570 and HI-8571 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. A logic input is provided to control the slope of the differential output signal. Timing is set by an on-chip resistor and capacitor and tested to be within ARINC requirements. The HI-8570 has 37.5 ohms in series with each line driver output. The HI-8571 provides the option to bypass part of the output resistance so external resistance may be added for lightning protection circuits. The HI-8570 or the HI-8571 along with the HI-8588 line receiver offer the smallest options available to get on and off theARINC 429 bus.
8 V+ 7 TXBOUT 6 TXAOUT 5 V-
SUPPLY VOLTAGES
V+ = +5V V- = -5V
FUNCTION TABLE
TX1IN TX0IN SLP1.5 TXAOUT 0V -5V -5V 5V 5V 0V TXBOUT 0V 5V 5V -5V -5V 0V SLOPE N/A 10ms 1.5ms 10ms 1.5ms N/A 0 0 0 0 1 1 0 0 1 X 0 1 0 1 X
FEATURES
! ! ! ! ! ! !
Direct ARINC 429 line driver interface in a small package On-chip line driver slope control and selection by logic input Low current 5 volt supplies CMOS / TTL logic pins
1 1 1
PIN DESCRIPTION TABLE
PIN SYMBOL SLP 1.5 TX0IN TX1IN GND VTXAOUT TXBOUT V+ FUNCTION LOGIC INPUT LOGIC INPUT LOGIC INPUT POWER POWER OUTPUT OUTPUT POWER DESCRIPTION CMOS OR TTL, V+ IS OK CMOS OR TTL CMOS OR TTL GROUND -5 VOLTS LINE DRIVER TERMINAL A LINE DRIVER TERMINAL B +5 VOLTS 1 2 3
Plastic and ceramic package options surface mount and DIP Thermally enhanced SOIC packages Mil processing available
4 5 6 7 8
(DS8570 Rev. B)
HOLT INTEGRATED CIRCUITS www.holtic.com
08/06
HI-8570, HI-8571
FUNCTIONAL DESCRIPTION
Figure 1 is a block diagram of the line driver. The +5V and -5V levels are generated from the supply voltages. Currents for slope control are set by zener voltages across onchip resistors. The TX0IN and TX1IN inputs receive logic signals from a control transmitter chip such as the HI-6010, HI-3282, HI8282A, HI-8584 or HI-8783. TXAOUT 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 SLP1.5 pin. If the SLP1.5 pin is high, the capacitor is nominally charged from 10% to 90% in 1.5s. If SLP1.5 is low, the rise and fall times are 10s. 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-8570 as exists on the HI8382. The HI-8570 has 37.5 ohms in series with each output and the HI-8571 has 27.5 ohms in series with each output. The HI-8571 is for applications where external series resistance is required, typically for lightning protection devices. Both the HI-8570 and HI-8571 are built using high-speed CMOS technology. Care should be taken to ensure the V+ and V- supplies are locally decoupled and that the input waveforms are free from negative voltage spikes which may upset the chip's internal slope control circuitry.
5V
ONE
"A" SIDE
CURRENT CONTROL
TXAOUT
HI-8570 = 37.5 OHMS HI-8571 = 27.5 OHMS
NULL ZERO -5V
TX0IN
TX1IN
ESD PROTECTION AND VOLTAGE TRANSLATION
CONTROL LOGIC
SLP1.5
5V ONE
"B" SIDE
CURRENT CONTROL
TXBOUT HI-8570 = 37.5 OHMS HI-8571 = 27.5 OHMS
NULL ZERO CONTROL LOGIC
-5V
FIGURE 1 - LINE DRIVER BLOCK DIAGRAM
5V
1
HARDWIRED OR DRIVEN FROM LOGIC
{
2 8 4
VCC
TESTA TESTB
ROUTA ROUTB
6 7
RXD1 RXD0
HI-8588
RINA RINB
APPLICATION INFORMATION
Figure 2 shows a possible application of the HI-8570/8571 interfacing an ARINC transmit channel from the HI6010.
ARINC Channel
3
HI-6010
5
5V
1 6
SLP1.5 TXAOUT
8 BIT BUS
8
V+ TX1IN TX0IN V-
3 2
ARINC Channel
TXD1 TXD0
7
HI-8570
TXBOUT GND
4
5
-5V
FIGURE 2 - APPLICATION DIAGRAM
HOLT INTEGRATED CIRCUITS 2
HI-8570, HI-8571 ABSOLUTE MAXIMUM RATINGS
Voltages referenced to Ground Supply voltages V+....................................................+7V V-......................................................-7V DC current per input pin................. +10mA Power dissipation at 25C plastic DIL............1.0W, derate 10mW/C ceramic DIL..........0.5W, derate 7mW/C Solder Temperature ........275C for 10 sec Storage Temperature........-65C to +150C NOTE: Stresses above absolute maximum ratings or outside recommended operating conditions may cause permanent damage to the device. These are stress ratings only. Operation at the limits is not recommended.
RECOMMENDED OPERATING CONDITIONS
Supply Voltages V+....................................+4.8V to +5.3V V-..................................... -5.3V to -4.8V Temperature Range Industrial Screening.........-40C to +85C Hi-Temp Screening........-55C to +125C Military Screening..........-55C to +125C
DC ELECTRICAL CHARACTERISTICS
V+ = +5V, V- = -5V, TA = Operating Temperature Range (unless otherwise stated)
PARAMETERS Input voltage (TX1IN, TX0IN, SLP1.5) high low Input current (TX1IN, TX0IN, SLP1.5) source sink ARINC output voltage (Differential) one zero null ARINC output voltage (Ref. to GND) one or zero null Operating supply current V+ VARINC output impedence HI-8570 HI-8571 SYMBOL VIH VIL TEST CONDITIONS MIN 2.1 TYP MAX V+ 0.5 UNITS volts volts
IIH IIL
VIN = 0V VIN = 5V
-
-
0.1 0.1
mA mA
VDIFF1 VDIFF0 VDIFFN
no load; TXAOUT - TXBOUT 9.00 no load; TXAOUT - TXBOUT -11.00 no load; TXAOUT - TXBOUT -0.50
10.00 -10.00 0
11.00 -9.00 0.50
volts volts volts
VDOUT VNOUT
no load & magnitude at pin no load
SLP1.5 = V+ TX1IN & TX0IN = 0V: no load TX0IN & TX1IN = 0V: no load
4.50 -0.25
5.00 0
5.50 0.25
volts volts
IDD IEE ZOUT
-10.0
6.0 -6.0
10.0 -
mA mA
-
37.5 27.5
-
ohms ohms
HOLT INTEGRATED CIRCUITS 3
HI-8570, HI-8571 AC ELECTRICAL CHARACTERISTICS
V+ = 5.0V, V- = -5V, TA = Operating Temperature Range (unless otherwise stated) PARAMETERS Line Driver propagation delay Output high to low Output low to high Line Driver transition times High Speed Output high to low Output low to high Low Speed Output high to low Output low to high Input capacitance (1) logic Notes: 1. Guaranteed but not tested t phlx t plhx SLP 1.5 = V+ pin 1 = logic 1 pin 1 = logic 1 SLP 1.5 = GND pin 1 = logic 1 pin 1 = logic 1 SYMBOL TEST CONDITIONS defined in Figure 3, no load 500 500 ns ns MIN TYP MAX UNITS
t fx t rx t fx t rx
1.0 1.0 5.0 5.0
1.5 1.5 10.0 10.0
2.0 2.0 15.0 15.0
s s s s
CIN
-
-
10
pF
pin 3 t phlx t plhx pin 2 t phlx t rx t rx VDIFF pin 6 - pin 7
90% 10% 90% 10% 10%
5V 0V
t plhx 5V 0V
10V 0V -10V t fx
t fx
FIGURE 3 - LINE DRIVER TIMING
HOLT INTEGRATED CIRCUITS 4
HI-8570, HI-8571 PACKAGE THERMAL CHARACTERISTICS Maximum ARINC Load
PACKAGE STYLE
1
ARINC 429 DATA RATE
Low Speed3 High Speed4
SUPPLY CURRENT (mA)
Ta = 25C Ta = 85C
2
JUNCTION TEMP, Tj C
Ta = 25C Ta = 85C Ta = 125C
Ta = 125C
8 Lead Plastic ESOIC5
20.98 26.40
20.96 26.16
20.96 25.96
38.24 44.78
98.34 104.66
138.92 144.59
TXAOUT and TXBOUT Shorted to Ground
PACKAGE STYLE
1
6,7,8
ARINC 429 DATA RATE
Low Speed
3
SUPPLY CURRENT (mA)
Ta = 25C Ta = 85C
2
JUNCTION TEMP, Tj C
Ta = 25C Ta = 85C Ta = 125C
Ta = 125C
8 Lead Plastic ESOIC
5
30.26 30.44
29.22 29.42
28.46 28.68
53.75 53.92
112.76 112.95
152.04 152.25
High Speed4
Notes: 1. All data taken in still air. 2. At 100% duty cycle, 5V power supplies. 3. Low Speed: Data Rate = 12.5 Kbps, Load: R = 400 Ohms, C = 30 nF. 4. High Speed: Data Rate = 100 Kbps, Load: R = 400 Ohms, C = 10 nF. Data not presented for C = 30 nF as this is considered unrealistic for high speed operation. 5. 8 Lead Plastic ESOIC (Thermally enhanced SOIC with built in heat sink). Heat sink not soldered. 6. Similar results would be obtained with TXAOUT shorted to TXBOUT. 7. For applications requiring survival with continuous short circuit, operation above Tj = 175C is not recommended. 8. Data will vary depending on air flow and the method of heat sinking employed.
HEAT SINK - ESOIC PACKAGES
An 8-pin thermally enhanced SOIC package is used for the HI-8570/HI-8571 products. The ESOIC package includes 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. However, since the chip's substrate is at V+, connecting the heat sink to this power plane is recommended to avoid coupling noise into the circuit.
HOLT INTEGRATED CIRCUITS 5
HI-8570, HI-8571
ORDERING INFORMATION HI - 857x xx x x
PART NUMBER LEAD FINISH
Blank F
PART NUMBER
Tin / Lead (Sn / Pb) Solder 100% Matte Tin (Pb-free, RoHS compliant)
TEMPERATURE RANGE FLOW BURN IN
I T M
PART NUMBER
-40C TO +85C -55C TO +125C -55C TO +125C
PACKAGE DESCRIPTION
I T M
NO NO YES
PD PS CR
PART NUMBER
8 PIN PLASTIC DIP 8 PIN PLASTIC ESOIC - NB 8 PIN CERDIP (Not Available Pb-Free)
OUTPUT SERIES RESISTANCE BUILT-IN REQUIRED EXTERNALLY
8570 8571
37.5 Ohms 27.5 Ohms
0 10 Ohms
Legend: ESOIC - Thermally Enhanced Small Outline Package (SOIC w/built-in heat sink) NB - Narrow Body
HOLT INTEGRATED CIRCUITS 6
HI-8570 / HI-8571 PACKAGE DIMENSIONS
inches (millimeters)
8-PIN PLASTIC SMALL OUTLINE (ESOIC) - NB (Narrow Body, Thermally Enhanced)
Top View
.1935 .0035 (4.915 .085) .0085 .0015 (.2159 .0381)
Package Type: 8HNE Bottom View
.140 .010 (3.556 .254)
.236 .008 (5.994 .203)
PIN 1
.1535 .0035 (3.90 .09)
.100 .010 (2.540 .254)
.0165 .0035 (.4191 .0889)
DETAIL A
.055 .005 (1.397 .127)
Electrically isolated metal heat sink on bottom of package (Connect to any ground or power plane for optimum thermal dissipation)
0 to 8
.0025 .0015 (.0635 .0381)
.050 .010 (1.27 .254)
.033 .017 (.8382 .4318)
DETAIL A
8-PIN PLASTIC DIP
Package Type: 8P
.385 .015 (4.699 .381) .250 .010 (6.350 .254) .100 .010 (3.540 .254) .300 .010 (7.620 .254) .025 .010 (.635 .254) .0115 .0035 (.292 .089) .055 .010 (1.397 .254) .335 .035 (8.509 .889)
7 TYP. .135 .015 (3.429 .381) .1375 .0125 (3.493 .318) .019 .002 (.483 .102)
HOLT INTEGRATED CIRCUITS 7
HI-8570 / HI-8571 PACKAGE DIMENSIONS
inches (millimeters)
8-PIN CERDIP
Package Type: 8D
.380 .004 (9.652 .102) .005 MIN. (.127 MIN.) .248 .003 (6.299 .076) .039 .006 (.991 .154)
.100 .008 (2.540 .203) .015 MIN. (.381 MIN.)
.314 .003 (7.976 .076)
.200 MAX. (5.080 MAX.) .163 .037 (4.140 .940)
Base Plane Seating Plane
.056 .006 (1.422 .152) .018 .006 (.457 .152) .350 .030 (8.890 .762)
.010 .006 (.254 .152)
HOLT INTEGRATED CIRCUITS 8

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