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| HI-8421 October 2001 DESCRIPTION The HI-8421 is a six channel discrete-to-digital interface device. Mixed-signal CMOS technology is used to provide superior low-power performance. The HI-8421 has six separate 28 Volt / open sensing inputs. The device outputs are CMOS / TTL compatible and may be disabled (tri-state) using the CE and OE pins. The device is a drop-in replacement for the DEI1054. For added functionality, the Holt HI-8422 offers eight channels of Open / Ground sensing and eight channels of 28V / Ground sensing in a single device. The HI-8421 is offered in a small footprint 16-pin plastic package. Please contact the Holt sales department for other packaging options. PIN CONFIGURATION IN1 IN2 IN3 IN4 IN5 IN6 OE CE 1 2 3 4 5 6 7 8 16 15 14 GND OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 VDD HI-8421PS 13 12 11 10 9 16-Pin Plastic SOIC package (Narrow Body) FEATURES ! ! ! ! ! Six independent 28 Volt / Open sensing channels 5.0 V single supply operation BLOCK DIAGRAM VDD Low power CMOS technology Military processing options available Drop in replacement for DEI1054 OE CE 3.6V Reference 66 K + 29 K IN1 OUT1 66 K + 29 K IN2 OUT2 + 66 K FUNCTION TABLE Discrete Input Open 28 Volts X X CE 0 0 1 X OE 0 0 X 1 Output IN3 29 K 66 K + 29 K 66 K OUT3 IN4 OUT4 + 29 K 1 0 High Z High Z IN5 OUT5 66 K + 29 K IN6 OUT6 GND (DS8421 Rev. New) HOLT INTEGRATED CIRCUITS www.holtic.com 10/01 HI-8421 PIN DESCRIPTIONS PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL IN1 IN2 IN3 IN4 IN5 IN6 OE CE VDD OUT6 OUT5 OUT4 OUT3 OUT2 OUT1 GND FUNCTION Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input Discrete Input Digital input Digital input Power Tri-state output Tri-state output Tri-state output Tri-state output Tri-state output Tri-state output Power DESCRIPTION 28 Volt / Open sensing input, channel 1 28 Volt / Open sensing input, channel 2 28 Volt / Open sensing input, channel 3 28 Volt / Open sensing input, channel 4 28 Volt / Open sensing input, channel 5 28 Volt / Open sensing input, channel 6 Output Enable. OUT1-OUT6 are high-impedance if OE is high Chip Enable. OUT1-OUT6 are high-impedance if CE is high Positive supply voltage 5.0 V Logic output, channel 6 Logic output, channel 5 Logic output, channel 4 Logic output, channel 3 Logic output, channel 2 Logic output, channel 1 Ground ABSOLUTE MAXIMUM RATINGS Supply voltage (VDD) Logic input voltage range Discrete input voltage range 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 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. VDD = 5.0V 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER 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 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 K A HOLT INTEGRATED CIRCUITS 2 HI-8421 VDD = 5.0V 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER LOGIC INPUTS (CE, OE) Input Voltage Input current OUTPUTS Logic output voltage Logic output voltage (CMOS) Tri-state output current SUPPLY CURRENT VDD current SWITCHING CHARACTERISTICS Propagation delay Output enable time Output disable time IN to OUT High Low High Low Input voltage HI Input voltage LO Input sink Input source SYMBOL VIH VIL IIH IIL VOH VOL VOH VOL IOZ CONDITION MIN 2.0 TYP MAX UNITS V 0.8 VIH = VDD VIL = 0 V IOH = -5 mA IOL = 5 mA IOH = -100 uA IOL = 100 uA VOUT = 0 V or VDD VDD - 0.2 0.2 10 -1.0 2.4 0.4 1.0 V A A V V V V A IDD tLH, tHL tZL, tZH tLZ, tHZ VIN = 0 V (all inputs) 5 10 500 mA ns ns ns From CE or OE From CE or OE 25 25 CE or OE tZL, tZH tZL, tZH INx tHL tLH OUTx OUTx Output Enable Timing Input to Output Propagation Delay ORDERING INFORMATION HI-8421PSI HI-8421PST 16 PIN PLASTIC SOIC (NARROW BODY) 16 PIN PLASTIC SOIC (NARROW BODY) -40C TO +85C -55C TO +125C I T NO NO SOLDER SOLDER HOLT INTEGRATED CIRCUITS 3 PACKAGE DIMENSIONS inches (millimeters) 16-PIN PLASTIC SMALL OUTLINE (SOIC) - NB (Narrow Body) .3898 .0039 (9.901 .099) .00865 .00115 (.220 .029) Package Type: 16HN .236 .008 (6.00 .20) Top View .1535 .0035 (3.899 .089) .0165 .0035 (.419 ..089) Detail A .061 .007 (1.549 .178) 0 to 8 .050 .010 (1.270 .254) .033 .017 (.838 .432) Detail A .0069 .0029 (.175 .074) HOLT INTEGRATED CIRCUITS 4 |
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