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| HI-8422 September 2006 16-Channel Discrete-to-Digital Interface Sensing 28 Volt / Open and Open / Ground Signals FEATURES ! ! ! ! ! ! 8 independent 28 Volt / Open sensing channels 8 independent Open / Ground sensing channels 5.0 V single supply operation Low power CMOS technology Sense inputs are internally lightning protected per DO-160D level 3 Military processing options available DESCRIPTION The HI-8422 is a sixteen channel discrete-to-digital interface device. The device has eight channels designed to sense 28 V / Open signals and eight channels that sense Open / Ground signals. Data is multiplexed from each bank of sensors to an eight bit digital databus. Mixed-signal CMOS technology is used to provide superior low-power performance. The device outputs are CMOS / TTL compatible and may be disabled (tri-state) using the CE and OE pins. The HI-8422 is offered in a small footprint 32-pin Plastic Quad Flat Package (PQFP). Please contact the Holt sales department for other packaging options. PIN CONFIGURATION 31 - 28VIN2 27 - GND 28 - N/C 26 - D1 28V Inputs Open 28 Volts X X X X 0V Inputs X X Open Ground X X A0 1 1 0 0 X X CE 0 0 0 0 1 X OE 0 0 0 0 X 1 Output 28VIN3 - 1 24 - N/C 23 - D3 1 0 0 1 High Z High Z 0VIN3 - 2 28VIN4 - 3 0VIN4 - 4 28VIN5 - 5 0VIN5 - 6 28VIN6 - 7 0VIN6 - 8 25 - D2 FUNCTION TABLE 29 - 28VIN1 32 - 0VIN2 30 - 0VIN1 HI-8422PQI & HI-8422PQT 22 - N/C 21 - 0VIN8 20 - 28VIN8 19 - D4 18 - D5 17 - D6 0VIN7 - 10 CE - 12 VDD - 14 A0 - 13 D8 - 15 32 Pin PQFP package (DS8422 Rev. E) HOLT INTEGRATED CIRCUITS www.holtic.com 28VIN7 - 9 OE - 11 D7 - 16 09/06 HI-8422 PIN DESCRIPTIONS PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 SYMBOL 28VIN3 0VIN3 28VIN4 0VIN4 28VIN5 0VIN5 28VIN6 0VIN6 28VIN7 0VIN7 OE CE A0 VDD D8 D7 D6 D5 D4 28VIN8 0VIN8 N/C D3 N/C D2 D1 GND N/C 28VIN1 0VIN1 28VIN2 0VIN2 FUNCTION Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input Discrete input Discrete Input Discrete Input Discrete Input Digital input Digital input Digital input Power Tri-state output Tri-state output Tri-state output Tri-state output Tri-state output Discrete Input Discrete Input Tri-state output Tri-state output Tri-state output Power Discrete Input Discrete Input Discrete Input Discrete Input DESCRIPTION 28 Volt / Open sensing input, channel 3 Open / Ground sensing input, channel 3 28 Volt / Open sensing input, channel 4 Open / Ground sensing input, channel 4 28 Volt / Open sensing input, channel 5 Open / Ground sensing input, channel 5 28 Volt / Open sensing input, channel 6 Open / Ground sensing input, channel 6 28 Volt / Open sensing input, channel 7 Open / Ground sensing input, channel 7 Output Enable. D1-D8 are high-impedance if OE is high Chip Enable. D1-D8 are high-impedance if CE is high When A0 is high D1 - D8 outputs data from 28V comparators When A0 is low D1 - D8 show results from 0V comparators Positive supply voltage 5.0 V Logic output, channel 8 Logic output, channel 7 Logic output, channel 6 Logic output, channel 5 Logic output, channel 4 28 Volt / Open sensing input, channel 8 Open / Ground sensing input, channel 8 Not connected Logic output, channel 3 Not connected Logic output, channel 2 Logic output, channel 1 Ground Not connected 28 Volt / Open sensing input, channel 1 Open / Ground sensing input, channel 1 28 Volt / Open sensing input, channel 2 Open / Ground sensing input, channel 2 HOLT INTEGRATED CIRCUITS 2 HI-8422 BLOCK DIAGRAM VDD OE CE 3.6V Reference 66 K + 29 K 28VIN1 66 K + 29 K 28VIN2 + 66 K 28VIN3 29 K 66 K + 29 K 66 K 28VIN4 + 29 K D1 28VIN5 66 K + 29 K D2 28VIN6 66 K + 29 K D3 28VIN7 66 K + 29 K D4 28VIN8 8 x 2:1 MUX VDD D5 5K 9K D6 + - 0VIN1 5K 9K 0VIN2 + 5K 9K D7 D8 + - 0VIN3 5K 9K 0VIN4 + 5K 9K 0VIN5 + 5K 9K 0VIN6 + 5K 9K 0VIN7 + 5K 9K 0VIN8 GND + 9K 5K 3.25V Reference A0 HOLT INTEGRATED CIRCUITS 3 HI-8422 ABSOLUTE MAXIMUM RATINGS Supply voltage (VDD) Logic input voltage range Discrete input voltage range: 28V / Open Sensing Open / Ground Sensing Power dissipation at 25C Solder Temperature Storage Temperature -0.3 V to +7 V -0.3 V to +5.5 V -80 V to + 80 V -5 V to + 35 V 350 mW 275C for 10 sec -65C to +150C RECOMMENDED OPERATING CONDITIONS Supply Voltage VDD .................................. 4.5 V to 5.5 V Operating Temperature Range Industrial Screening ......... Hi-Temp Screening ........ -40C to +85C -55C to +125C 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. DC ELECTRICAL CHARACTERISTICS VDD = 5.0V 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER 28 V / OPEN DISCRETE INPUTS Open state input voltage 28 V state input voltage Open state input current 28 V state input current Input resistance Input current at 28 V OPEN / GROUND DISCRETE INPUTS Ground state input voltage Open state input voltage Ground state input resistor Open state input resistor Input source current Reverse leakage current LOGIC INPUTS (CE, OE) Input Voltage Input current OUTPUTS Logic output voltage Logic output voltage (CMOS) Tri-state output current SUPPLY CURRENT VDD current High Low High Low Input voltage HI Input voltage LO Input sink Input source SYMBOL VSO VS28 ISO IS28 RIN IIN28 CONDITION Input voltage to give high output Input voltage to give low output Maximum input current to give high output Minimum input current to give low output 0 V < VIN < 16 V VIN = 28 V MIN -5 14 TYP MAX 10 UNITS V V 84 197 71 119 394 A A KW A VSG VSO RIG RIO IIO IIR Input voltage to give high output Input voltage to give low output Resistor from input to ground to give high output Resistor from input to ground to give low output Current sourced into 100W to ground VIN = 35 V, VDD = 0 V 3.5 0 100 -100 -330 3.0 100 V V W KW A 5.0 mA VIH VIL IIH IIL VOH VOL VOH VOL IOZ VIH = VDD VIL = 0 V IOH = -5 mA IOL = 5 mA IOH = -100 uA IOL = 100 uA VOUT = 0 V or VDD 2.0 0.8 1.0 -1.0 2.4 0.4 VDD - 0.2 0.2 10 V V A A V V V V A IDD VIN = 0 V (28V inputs) VIN = VDD (other inputs) 10 20 mA HOLT INTEGRATED CIRCUITS 4 HI-8422 AC ELECTRICAL CHARACTERISTICS VDD = 5.0V 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER SWITCHING CHARACTERISTICS Propagation delay Output enable time Output disable time A0 Set-up time A0 Hold time IN to OUT SYMBOL tLH, tHL tZL, tZH tLZ, tHZ tSU tHOLD CONDITION MIN TYP MAX 500 UNITS ns ns ns ns ns From CE or OE From CE or OE 0 0 25 25 TIMING DIAGRAMS A0 tSU tHOLD tHL tLH INx CE or OE tZL, tZH tZL, tZH Dx Dx Output Enable Timing Input to Output Propagation Delay LIGHTNING PROTECTION The HI-8422's 28V / Open Sensing inputs will survive lightning testing to DO-160D, Level 3 waveforms 3, 4 and 5A without external components. The Open / Ground inputs will survive waveforms 3 and 4 without external components. In order to guarantee survival to waveform 5A an external series resistor of at least 3.3KW is recommended. INPUT SWITCHING THRESHOLD The input switching threshold of the Open / Ground inputs will decrease with increasing series resistance according to the function VT = 3.25 - 0.1R where VT is the nominal input switching threshold, and R is the value of the external series resistor in Kohms. ORDERING INFORMATION HI - 8422PQ 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 PART NUMBER -40C TO +85C -55C TO +125C PACKAGE DESCRIPTION I T NO NO 8422PQ 32 PIN PLASTIC QUAD FLATPACK (PQFP) HOLT INTEGRATED CIRCUITS 5 PACKAGE DIMENSIONS inches (millimeters) 32 PIN PLASTIC QUAD FLAT PACK (PQFP) Package Type: 32PTQS .00057 .00022 (0.0145 .0055) .0315 BSC (0.80 BSC) .0148 .0030 (0.375 .075) .0236 .0059 (0.60 .15) .3543 BSC SQ. (9.00 BSC) .2755 BSC SQ. (7.00 BSC) .0551 .002 (1.4 .05) See Detail A .063 MAX. (1.60 MAX.) .0039 .002 (0.10 .05) .0031 R MIN. (0.08 R MIN.) .0055R .0024 (0.14R .06) 0 Q 7 Detail A HOLT INTEGRATED CIRCUITS 6 |
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