February 2001 GENERAL DESCRIPTION The HI-8482 bus interface unit is a silicon gate CMOS device designed as a dual differential line receiver in accordance with the requirements of the ARINC 429 bus specification. The device translates incoming ARINC 429 signals to normal CMOS/TTL levels on each of its two independent receive channels. The HI-8482 is also functionally equivalent to the Fairchild/Raytheon RM3183. PIN CONFIGURATIONS (Top Views) IN2B - 4 OUT2B - 5 The self-test inputs force the outputs to either a ZERO, ONE, or NULL state for system tests. While in self-test mode, the ARINC inputs are ignored. IN2A - 6 CAP2A - 7 OUT2A - 8 HI-8482J HI-8482JT 18 - IN1A 20 - PIN PLASTIC J-LEAD PLCC 16 - IN1B 17 - CAP1B 15 - OUT1A 14 - GND All the ARINC inputs have built-in hysteresis to reject noise that may be present on the ARINC bus. Additional input noise filtering can also be accomplished with external capacitors. The HI-8482 line receiver is one of several options offered by Holt Integrated Circuits to interface to the ARINC bus. The digital data processing for serial-to-parallel conversion and clock recovery can be accomplished with the HI-6010, HI-8683 or similar devices. The HI-8482 is available in a variety of ceramic & plastic packages including Small Outline (SOIC), J-Lead PLCC, Cerquad, DIP & Leadless Chip Carrier (LCC). FEATURES -VS - 1 TESTA - 2 CAP2B - 3 IN2B - 4 OUT2B - 5 IN2A - 6 CAP2A - 7 OUT2A - 8 +VL - 9 N/C - 10 HI-8482PSI HI-8482PST 20 - PIN PLASTIC SMALL OUTLINE (SOIC) - WB 20 - TESTB 19 - CAP1A 18 - IN1A 17 - CAP1B 16 - IN1B 15 - OUT1A 14 - GND 13 - N/C 12 - OUT1B 11 - +VS ! Converts ARINC 429 levels to digital data ! Direct replacement for the RM3183 ! Greater than 2 volt receiving hysteresis ! TTL and CMOS outputs and test inputs ! Military screening available ! 20-Pin SOIC, PLCC, CERQUAD. DIP & LCC packages are available (DS8482 Rev. C) TRUTH TABLE ARINC INPUTS TEST INPUTS OUTPUTS V (A) - V (B) TEST A TEST B OUT A OUT B Null 0 0 0 0 Zero 0 0 0 1 One 0 0 1 0 Don't Care 0 1 0 1 Don't Care 1 0 1 0 Don't Care 1 1 0 0 HOLT INTEGRATED CIRCUITS 1 02/01 HI-8482 FUNCTIONAL DESCRIPTION The HI-8482 contains two independent ARINC 429 receive channels. The diagram in Figure 1 illustrates a typical HI8482 receive channel. ARINC LEVELS The ARINC 429 specification requires the following detection levels: The differential ARINC signal input is converted to a positive signal referenced to ground through level shifters and a unity gain differential amplifier. A positive differential input signal is converted to a positive signal on the plus output of the differential amplifier. This output is proportional in amplitude to the original input signal. At the same time, the corresponding MINUS output is pulled to GND. Likewise when a negative input signal is present at the ARINC inputs, a positive signal is present on the MINUS output and the PLUS output is pulled to GND. The outputs of the differential amplifier are compared with the ONE, ZERO and NULL threshold levels to produce the appropriate logic level on the OUTA and OUTB outputs of the device. The ARINC clock signal may be recovered through a NOR function of OUTA and OUTB. The test inputs logically disconnect the outputs of the comparators from OUTA and OUTB and force the device outputs to one of the three valid states (Figure 5). This alleviates having to ground the ARINC inputs during test mode operation. STATE ONE NULL ZERO The HI-8482 guarantees recognition of these levels with a common mode voltage with respect to GND less than ±5V for the worst case condition. NOISE The input hysteresis is set to reject voltage level transitions in the undefined region between the maximum ZERO level and the minimum NULL level and the undefined region between the maximum NULL level and the minimum ONE level. Therefore, once a valid input differential voltage threshold is detected, the outputs will remain at a valid logic state until a new valid input voltage is detected. In addition to the hysteresis, the CapA and CapB pinsmake it possible to add simple RC filters to the ARINC inputs. TESTA TESTB INA Detect Level LEVEL SHIFT Comp CAPA INB CAPB LEVEL SHIFT Comparators w / hysteresis DIFF AMP DIFFERENTIAL VOLTAGE +6.5V to +13V +2.5V to -2.5V -6.5V to -13V Comp Detect Level HOLT INTEGRATED CIRCUITS 2 HI-8482 TYPICAL APPLICATIONS ground (GND) connection should be sturdy and isolated from large switching currents to provide a quiet ground reference. APPLICATIONS The HI-8482 can be used with HI-8382 or HI-8585 Line Drivers to provide a complete analog ARINC 429 interface solution. A simple application, which can be used in systems requiring a repeater type circuit for long transmissions or for test interfaces, is given in Figure 3. More HI-8382 or HI-8585 drivers may be added to test multiple ARINC channels, as shown. The standard connections for the HI-8482 are shown in Figure 2. Decoupling of the supply should be done near the IC to avoid propagation of noise spikes due to switching transients. The ARINC RECEIVER STANDARD CONNECTIONS +5V +15V HI-8482 ARINC CHANNEL 1 IN1A OUT1A A IN1B OUT1B B OUT2A A OUT2B B CHANNEL 1 DATA OUT TO LOGIC 39 pF CAP1A 39 pF CAP1B IN2A ARINC CHANNEL 2 IN2B 39 pF 39 pF CHANNEL 2 DATA OUT TO LOGIC CAP2A CAP2B TESTA LOGIC TEST INPUTS N/C TESTB N/C -15V ARINC REPEATER CIRCUIT ARINC INPUT CHANNEL IN1A OUT1A DATA (A) AOUT IN1B OUT1B DATA (B) BOUT DATA (A) AOUT DATA (B) BOUT HOLT INTEGRATED CIRCUITS 3 A B A B ARINC OUTPUT CHANNEL 1 ARINC OUTPUT CHANNEL 2 HI-8482 PIN DESCRIPTION TABLE SYMBOL FUNCTION DESCRIPTION SYMBOL FUNCTION CAP1A INPUT Filter capacitor input for terminal A of channel 1 CAP1B INPUT Filter capacitor input for terminal B of channel 1 DESCRIPTION IN2B INPUT ARINC input terminal B of channel 2 OUT1A OUTPUT TTL output terminal A of channel 1 OUT1B OUTPUT TTL output terminal B of channel 1 OUT2A OUTPUT TTL output terminal A of channel 2 TTL output terminal B of channel 2 CAP2A INPUT Filter capacitor input for terminal A of channel 2 OUT2B OUTPUT CAP2B INPUT Filter capacitor input for terminal B of channel 2 TESTA INPUT Test input terminal A 0 Volts TESTB INPUT Test input terminal B GND POWER IN1A INPUT ARINC input terminal A of channel 1 +VL POWER +5 Volts ±10% IN1B INPUT ARINC input terminal B of channel 1 +Vs POWER +12 Volts ±10% or +15 Volts ±10% IN2A INPUT ARINC input terminal A of channel 2 -Vs POWER -12 Volts ±10% or -15 Volts ±10% TIMING DIAGRAMS +10V ARINC DIFFERENTIAL INPUT 0V -10V tPLH tr 90% 50% OUTA tf 10% tPHL tPHL tPLH 50% OUTB FIGURE 4. +5V TESTA 0V +5V TESTB 0V tTLH tr 90% 50% OUTA (test) tf 10% tTHL tTHL tTLH 50% OUTB (test) FIGURE 5. HOLT INTEGRATED CIRCUITS 4 HI-8482 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to Gnd = 0V) Supply Voltage, +VS:......................................................................+20 VDC -VS: .......................................................................-20 VDC +VL:........................................................................+7 VDC Operating Temperature Range: (Industrial) .........................-40°C to +85°C (Hi-Temp) ........................-55°C to +125°C (Military) ..........................-55°C to +125°C Internal Power Dissipation: ..............................................................900mW Voltage at ARINC Inputs: .......................................................-29V to +29V Voltage at Any Other Input:.............................................-0.3V to VL + 0.3V Output Short Circuit Protected: .............................................Not Protected Storage Temperature Range: .........................................-65°C to +150°C Soldering Temperature: (Ceramic).................................30 sec. at +300°C (Plastic - leads)........................10 sec. at +280°C (Plastic - body) ................................+220°C Max. NOTE: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS ±12 < VS < ±15, VL = +5V, Operating temperature range (unless otherwise noted) PARAMETERS SYMBOL TEST CONDITIONS ARINC inputs - IN1A, IN1B, IN2A, IN2B V(A) - V(B) V(A) - V(B) V(A) - V(B) (|V(A)| - |V(B)|) / 2 Input resistance - input A to input B Input resistance - input A or B to Gnd Input capacitance - input A to B Input capacitance - input A or B to Gnd VIH VIL VNULL VCM RI RG CI CG OUTA = 1 OUTB = 1 OUTA = OUTB = 0 Frequency = 80KHz Supply pins floating Supply pins floating Filter caps disconnected Filter caps disconnected MIN TYP MAX UNITS 6.5 -6.5 -2.5 10 -10 0 ±5 50K 25K 5 5 13 -13 2.5 10 10 volts volts volts volts ohms ohms pF pF 0.8 15 1 volts volts µA µA 30K 19K - see note 1 see note 1 Tes t inputs - TESTA, TESTB Logic 1 input voltage Logic 0 input voltage Logic 1 input current (magnitude) Logic 0 input current VIH VIL IIH IIL ARINC inputs to Gnd ARINC inputs to Gnd VIH = 2.7V VIL = 0V 2.7 Outputs - OUT1A, OUT1B, OUT2A, OUT2B Voltage - sourcing 100µA Voltage - sourcing 2.8mA Voltage - sinking 100µA Voltage - sinking 2.0mA Rise time Fall time Propagation delay - low to high (ARINC) VOH VOH VOL VOL tr tf tPLH TA = 25°C Full temperature range TA = 25°C Full temperature range CL = 50pF, TA = 25°C CL = 50pF, TA = 25°C CL = 50pF, TA = 25°C and filter caps disconnected 4 3.5 Propagation delay - high to low (ARINC) tPHL CL = 50pF, TA = 25°C and filter caps disconnected Propagation delay - low to high (TESTA/B) tTLH Propagation delay - low to high (TESTA/B) tTHL Supply current +VS current +VS current -VS current -VS current +VL current +VL current IDD IDD IEE IEE ICC ICC Notes: 5 0.5 40 30 600 0.08 0.8 70 70 volts volts volts volts ns ns ns 600 ns CL = 50pF, TA = 25°C 50 ns CL = 50pF, TA = 25°C 50 ns ±VS ±VS ±VS ±VS ±VS ±VS 3.7 3 8.7 7.4 9 8.6 = = = = = = ±15V, ±12V, ±15V, ±12V, ±15V, ±12V, TA =25°C, TESTA and TESTB = 0V TA =25°C, TESTA and TESTB = 0V TA =25°C, TESTA and TESTB = 0V TA =25°C, TESTA and TESTB = 0V TA =25°C, TESTA and TESTB = 0V TA =25°C, TESTA and TESTB = 0V 1. Guaranteed by design. HOLT INTEGRATED CIRCUITS 5 7 6 15 14 20 18 mA mA mA mA mA mA HI-8482 ADDITIONAL HI-8482 PIN CONFIGURATIONS (All 20-Pin Package Configurations) IN2B OUT2B IN2A CAP2A OUT2A IN2B OUT2B IN2A CAP2A OUT2A -VS - 1 20 - TESTB -VS - 1 20 - TESTB TESTA - 2 19 - CAP1A TESTA - 2 19 - CAP1A 18 - IN1A CAP2B - 3 18 - IN1A IN2B - 4 OUT2B - 5 IN2A - 6 CAP2A - 7 OUT2A - 8 +VL - 9 N/C - 10 4 5 6 7 8 HI-8482U HI-8482UT 20-PIN J-LEAD CERQUAD HI-8482C HI-8482CT HI-8482CM-01 20-PIN CERAMIC SIDE-BRAZED DIP 18 17 16 15 14 - HI-8482S HI-8482ST HI-8482SM-01 IN1A CAP1B IN1B OUT1A GND CAP2B - 3 - 17 - CAP1B 16 - IN1B 15 - OUT1A IN2B - 4 OUT2B - 5 IN2A - 6 14 - GND CAP2A - 7 13 - N/C OUT2A - 8 12 - OUT1B 11 - +VS - +VL - 9 N/C - 10 HOLT INTEGRATED CIRCUITS 6 4 5 6 7 8 20-PIN CERAMIC LCC HI-8482D HI-8482DT 20-PIN CERDIP 18 17 16 15 14 - IN1A CAP1B IN1B OUT1A GND 17 - CAP1B 16 - IN1B 15 - OUT1A 14 - GND 13 - N/C 12 - OUT1B 11 - +VS HI-8482 THERMAL CHARACTERISTICS THERMAL RESISTANCE PACKAGE DESCRIPTION JC JA PLASTIC SMALL OUTLINE (SOIC) 17°C/W 90°C/W PLASTIC J-LEAD PLCC 30°C/W 85°C/W CERDIP 28°C/W 90°C/W CERAMIC SIDE-BRAZED DIP 28°C/W 95°C/W CERAMIC J-LEAD CERQUAD 25°C/W 95°C/W CERAMIC LCC 25°C/W 85°C/W ORDERING INFORMATION PART NUMBER PACKAGE DESCRIPTION TEMPERATURE RANGE FLOW HI-8482C 20 PIN CERAMIC SIDE BRAZED DIP -40°C TO +85°C I NO GOLD HI-8482CT 20 PIN CERAMIC SIDE BRAZED DIP -55°C TO +125°C T NO GOLD HI-8482CM-01 20 PIN CERAMIC SIDE BRAZED DIP -55°C TO +125°C M YES SOLDER HI-8482D 20 PIN CERDIP -40°C TO +85°C I NO SOLDER HI-8482DT 20 PIN CERDIP -55°C TO +125°C T NO SOLDER HI-8482J 20 PIN PLASTIC J -LEAD PLCC -40°C TO +85°C I NO SOLDER HI-8482JT 20 PIN PLASTIC J -LEAD PLCC -55°C TO +125°C T NO SOLDER HI-8482PSI 20 PIN PLASTIC SMALL OUTLINE (SOIC) -40°C TO +85°C I NO SOLDER HI-8482PST 20 PIN PLASTIC SMALL OUTLINE (SOIC) -55°C TO +125°C T NO SOLDER HI-8482S 20 PIN CERAMIC LEADLESS CHIP CARRIER -40°C TO +85°C I NO GOLD HI-8482ST 20 PIN CERAMIC LEADLESS CHIP CARRIER -55°C TO +125°C T NO GOLD HI-8482SM-01 20 PIN CERAMIC LEADLESS CHIP CARRIER -55°C TO +125°C M YES SOLDER HI-8482U 20 PIN J-LEAD CERQUAD -40°C TO +85°C I NO SOLDER HI-8482UT 20 PIN J-LEAD CERQUAD -55°C TO +125°C T NO SOLDER HOLT INTEGRATED CIRCUITS 7 BURN LEAD IN FINISH HI-8482 PACKAGE DIMENSIONS inches (millimeters) 20-PIN PLASTIC SMALL OUTLINE (SOIC) - WB (Wide Body) Package Type: 20HW .5035 ± .0075 (12.789 ± .191) .0105 ± .0015 (.2667 ± .0381) .4065 ± .0125 (10.325 ± .318) .296 ± .003 (7.518 ± .076) SEE DETAIL A .018 TYP (.457) .090 ± .010 (2.286 ± .254) 0° to 8° .050 TYP (1.27) DETAIL A .033 ± .017 (.838 ± .432) .0075 ± .0035 (.191 ± .089) 20-PIN CERAMIC SIDE-BRAZED DIP Package Type: 20C 1.000 ± .010 (25.400 ± .254) .310 ± .010 (7.874 ± .254) .050 TYP. (1.270 TYP.) .200 MAX. (5.080 MAX.) .125 MIN. (3.175 MIN.) .300 ± .010 (7.620 ± .254) .085 ± .009 (2.159 ± .229) .017 ± .002 (.432 ± .051) .100 ± .005 (2.540 ± .127) HOLT INTEGRATED CIRCUITS 8 .010 + .002/− .001 (.254 ± .051/−.025) HI-8482 PACKAGE DIMENSIONS inches (millimeters) 20-PIN CERDIP Package Type: 20D 1.060 MAX. (26.924 MAX.) .005 MIN. (.127 MIN.) .070 MAX. (1.778 MAX.) .288 ± .005 (7.315 ± .127) .100 ± .010 (2.540 ± .254) .060 TYP. (1.524 TYP.) .310 ± .010 (7.874 ± .254) .200 MAX. (5.080 MAX.) .170 MAX. (4.318 MAX.) .015 MIN. (.381 MIN.) 0° to 15° .018 ± .003 (.457 ± .760) .125 MIN. (3.175 MIN.) .010 ± .002 (.254 ± .051) 20-PIN PLASTIC PLCC Package Type: 20J PIN NO. 1 IDENT .045 x 45° .045 x 45° .050 ± .005 (1.27 ± .127) .353 ± .003 (8.966 ± .076) SQ. .390 ± .005 (9.906 ± .127) SQ. .017 ± .004 (.432 ± .102) SEE DETAIL A .009 .011 .173 ± .008 (4.394 ± .203) .310 ± .020 (7.874 ± .508 ) DETAIL A HOLT INTEGRATED CIRCUITS 9 .015 ± .002 (.381 ± .051) .020 MIN (.508 ΜΙΝ) R .025 .045 HI-8482 PACKAGE DIMENSIONS inches (millimeters) 20-PIN CERAMIC LEADLESS CHIP CARRIER Package Type: 20S .020 INDEX (.508 INDEX) .175 ± .004 (4.445 ± .101) .080 ± .020 (2.032 ± .508) .040 x 45° 3 PLCS (1.016 x 45° 3 PLCS) .075 ± .004 (1.905 ± .101) PIN 1 PIN 1 .050 ± .005 (1.270 ± .127) .009R .006 (.229R ± .152) .350 ± .008 (8.890 ± .203) SQ. .050 BSC (1.270 BSC) .025 ± .003 (.635 ± .076) 20-PIN J-LEAD CERQUAD Package Type: 20U 2 1 20 19 .405 MAX. (10.287) MAX. SQ. .375 ± .008 (9.525 ± .203) .190 MAX. (4.826) MAX. .040 TYP. (1.016) TYP. .019 ± .003 (.483 ± .076) .050 TYP. (1.270) TYP. HOLT INTEGRATED CIRCUITS 10 .335 ± .010 (8.509 ± .254)