HI-8422 16-Channel Discrete-to-Digital Interface Sensing 28 Volt / Open and Open / Ground Signals September 2006 DESCRIPTION FEATURES 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. ! 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 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. 1 X 1 0 0 0 X Open 0 0 0 0 28VIN5 - 5 1 0VIN5 - 6 Ground 0 0 0 26 - D1 25 - D2 28 - N/C 27 - GND 23 - D3 28VIN4 - 3 28 Volts X 30 - 0VIN1 24 - N/C 0VIN3 - 2 X X 1 X High Z X X X X 1 High Z 21 - 0VIN8 20 - 28VIN8 19 - D4 28VIN6 - 7 18 - D5 0VIN6 - 8 17 - D6 28VIN7 - 9 X 22 - N/C HI-8422PQI & HI-8422PQT 0VIN4 - 4 D8 - 15 0 28VIN3 - 1 D7 - 16 0 Output A0 - 13 1 OE VDD - 14 X CE CE - 12 Open A0 OE - 11 0V Inputs 0VIN7 - 10 28V Inputs 29 - 28VIN1 32 - 0VIN2 FUNCTION TABLE 31 - 28VIN2 PIN CONFIGURATION 32 Pin PQFP package (DS8422 Rev. E) HOLT INTEGRATED CIRCUITS www.holtic.com 09/06 HI-8422 PIN DESCRIPTIONS PIN SYMBOL FUNCTION DESCRIPTION 1 28VIN3 Discrete Input 28 Volt / Open sensing input, channel 3 2 0VIN3 Discrete Input Open / Ground sensing input, channel 3 3 28VIN4 Discrete Input 28 Volt / Open sensing input, channel 4 4 0VIN4 Discrete Input Open / Ground sensing input, channel 4 5 28VIN5 Discrete Input 28 Volt / Open sensing input, channel 5 6 0VIN5 Discrete Input Open / Ground sensing input, channel 5 7 28VIN6 Discrete input 28 Volt / Open sensing input, channel 6 8 0VIN6 Discrete Input Open / Ground sensing input, channel 6 9 28VIN7 Discrete Input 28 Volt / Open sensing input, channel 7 10 0VIN7 Discrete Input Open / Ground sensing input, channel 7 11 OE Digital input Output Enable. D1-D8 are high-impedance if OE is high 12 CE Digital input Chip Enable. D1-D8 are high-impedance if CE is high 13 A0 Digital input 14 VDD Power 15 D8 Tri-state output Logic output, channel 8 16 D7 Tri-state output Logic output, channel 7 17 D6 Tri-state output Logic output, channel 6 18 D5 Tri-state output Logic output, channel 5 19 D4 Tri-state output Logic output, channel 4 20 28VIN8 Discrete Input 28 Volt / Open sensing input, channel 8 21 0VIN8 Discrete Input Open / Ground sensing input, channel 8 22 N/C 23 D3 Tri-state output Logic output, channel 3 24 N/C 25 D2 Tri-state output Logic output, channel 2 26 D1 Tri-state output Logic output, channel 1 27 GND Power 28 N/C 29 28VIN1 Discrete Input 28 Volt / Open sensing input, channel 1 30 0VIN1 Discrete Input Open / Ground sensing input, channel 1 31 28VIN2 Discrete Input 28 Volt / Open sensing input, channel 2 32 0VIN2 Discrete Input Open / Ground sensing input, channel 2 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 Not connected Not connected Ground Not connected HOLT INTEGRATED CIRCUITS 2 HI-8422 BLOCK DIAGRAM VDD OE CE 3.6V Reference + 66 K - 28VIN1 29 K + 66 K 28VIN2 29 K + 66 K 28VIN3 29 K + 66 K 28VIN4 29 K + 66 K 28VIN5 D1 29 K + 66 K D2 - 28VIN6 29 K D3 + 66 K 28VIN7 29 K D4 + 66 K - 28VIN8 29 K 8 x 2:1 MUX D5 VDD 5K 9K D6 + 0VIN1 5K 9K D7 + 0VIN2 5K 9K 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 RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGS Supply voltage (VDD) Logic input voltage range Discrete input voltage range: 28V / Open Sensing Open / Ground Sensing Power dissipation at 25°C 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 275°C for 10 sec -65°C to +150°C Supply Voltage VDD .................................. 4.5 V to 5.5 V Operating 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. Operation at the limits is not recommended. DC ELECTRICAL CHARACTERISTICS VDD = 5.0V ± 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER SYMBOL CONDITION MIN Open state input voltage VSO Input voltage to give high output -5 28 V state input voltage VS28 Input voltage to give low output 14 Open state input current ISO Maximum input current to give high output 28 V state input current IS28 Minimum input current to give low output 197 Input resistance RIN 0 V < VIN < 16 V 71 Input current at 28 V IIN28 VIN = 28 V Ground state input voltage VSG Input voltage to give high output Open state input voltage VSO Input voltage to give low output 3.5 Ground state input resistor RIG 0 Open state input resistor RIO Resistor from input to ground to give high output Resistor from input to ground to give low output Input source current IIO TYP MAX UNITS 10 V 28 V / OPEN DISCRETE INPUTS V 84 µA µA 119 KW 394 µA 3.0 V 100 W OPEN / GROUND DISCRETE INPUTS Current sourced into 100W V KW 100 -100 -330 µA to ground Reverse leakage current IIR VIN = 35 V, VDD = 0 V 5.0 mA LOGIC INPUTS (CE, OE) Input Voltage Input current Input voltage HI VIH Input voltage LO VIL 2.0 V Input sink IIH VIH = VDD Input source IIL VIL = 0 V -1.0 µA VOH IOH = -5 mA 2.4 V 0.8 V 1.0 µA OUTPUTS Logic output voltage High Low VOL IOL = 5 mA Logic output voltage (CMOS) High VOH IOH = -100 uA Low VOL IOL = 100 uA 0.2 V IOZ VOUT = 0 V or VDD ±10 µA 20 mA Tri-state output current 0.4 VDD - 0.2 V V SUPPLY CURRENT VDD current IDD VIN = 0 V (28V inputs) VIN = VDD (other inputs) HOLT INTEGRATED CIRCUITS 4 10 HI-8422 AC ELECTRICAL CHARACTERISTICS VDD = 5.0V ± 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS 500 ns SWITCHING CHARACTERISTICS Propagation delay IN to OUT tLH, tHL Output enable time tZL, tZH From CE or OE 25 ns Output disable time tLZ, tHZ From CE or OE 25 ns A0 Set-up time A0 Hold time tSU 0 ns tHOLD 0 ns TIMING DIAGRAMS A0 INx tSU tHOLD tLH tHL Dx CE or OE tZL, tZH tZL, tZH Dx Output Enable Timing Input to Output Propagation Delay LIGHTNING PROTECTION INPUT SWITCHING THRESHOLD 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. 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 Blank F PART NUMBER LEAD FINISH Tin / Lead (Sn / Pb) Solder 100% Matte Tin (Pb-free, RoHS compliant) TEMPERATURE RANGE FLOW BURN IN I -40°C TO +85°C I NO T -55°C TO +125°C T NO PART NUMBER 8422PQ PACKAGE DESCRIPTION 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) .3543 BSC SQ. (9.00 BSC) .0315 BSC (0.80 BSC) .2755 BSC SQ. (7.00 BSC) .0148 ± .0030 (0.375 ± .075) .0236 ± .0059 (0.60 ± .15) .0551 ± .002 (1.4 ± .05) .0055R ± .0024 (0.14R ± .06) See Detail A .063 MAX. (1.60 MAX.) 0° £ Q £ 7° .0039 ± .002 (0.10 ± .05) .0031 R MIN. (0.08 R MIN.) Detail A HOLT INTEGRATED CIRCUITS 6