HI-8421 October 2001 PIN CONFIGURATION 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. IN1 1 16 GND IN2 2 15 OUT1 IN3 3 14 OUT2 IN4 4 13 OUT3 IN5 5 12 OUT4 IN6 6 11 OUT5 OE 7 10 OUT6 CE 8 9 VDD HI-8421PS 16-Pin Plastic SOIC package (Narrow Body) BLOCK DIAGRAM FEATURES ! Six independent 28 Volt / Open sensing channels ! 5.0 V single supply operation ! Low power CMOS technology ! Military processing options available ! Drop in replacement for DEI1054 VDD OE CE 3.6V Reference + 66 K - IN1 OUT1 29 K + 66 K IN2 - OUT2 29 K + 66 K IN3 FUNCTION TABLE + 66 K IN4 Discrete Input CE OE - Output 0 0 1 28 Volts 0 0 0 X 1 X High Z X X 1 High Z OUT4 29 K + 66 K Open (DS8421 Rev. New) OUT3 29 K IN5 - OUT5 29 K + 66 K - IN6 OUT6 29 K GND HOLT INTEGRATED CIRCUITS www.holtic.com 10/01 HI-8421 PIN DESCRIPTIONS PIN SYMBOL FUNCTION DESCRIPTION 1 IN1 Discrete Input 28 Volt / Open sensing input, channel 1 2 IN2 Discrete Input 28 Volt / Open sensing input, channel 2 3 IN3 Discrete Input 28 Volt / Open sensing input, channel 3 4 IN4 Discrete Input 28 Volt / Open sensing input, channel 4 5 IN5 Discrete Input 28 Volt / Open sensing input, channel 5 6 IN6 Discrete Input 28 Volt / Open sensing input, channel 6 7 OE Digital input Output Enable. OUT1-OUT6 are high-impedance if OE is high 8 CE Digital input Chip Enable. OUT1-OUT6 are high-impedance if CE is high Positive supply voltage 5.0 V 9 VDD Power 10 OUT6 Tri-state output Logic output, channel 6 11 OUT5 Tri-state output Logic output, channel 5 12 OUT4 Tri-state output Logic output, channel 4 13 OUT3 Tri-state output Logic output, channel 3 14 OUT2 Tri-state output Logic output, channel 2 15 OUT1 Tri-state output Logic output, channel 1 16 GND Power Ground RECOMMENDED OPERATING CONDITIONS ABSOLUTE MAXIMUM RATINGS Supply voltage (VDD) Logic input voltage range Discrete input voltage range 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 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. 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 TYP MAX UNITS 10 V DISCRETE INPUTS HOLT INTEGRATED CIRCUITS 2 V 84 µA µA 119 KΩ 394 µA HI-8421 VDD = 5.0V ± 10%, GND = 0V, TA = Operating Temperature Range (unless otherwise specified). PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS LOGIC INPUTS (CE, OE) Input Voltage Input voltage HI VIH Input voltage LO VIL Input sink IIH VIH = VDD Input source IIL VIL = 0 V -1.0 High VOH IOH = -5 mA 2.4 Low VOL IOL = 5 mA High VOH IOH = -100 uA Low VOL IOL = 100 uA 0.2 V IOZ VOUT = 0 V or VDD ±10 µA IDD VIN = 0 V (all inputs) 10 mA Input current 2.0 V 0.8 V 1.0 µA µA OUTPUTS Logic output voltage Logic output voltage (CMOS) Tri-state output current V 0.4 V VDD - 0.2 V SUPPLY CURRENT VDD current 5 SWITCHING CHARACTERISTICS Propagation delay 500 ns Output enable time IN to OUT tLH, tHL tZL, tZH From CE or OE 25 ns Output disable time tLZ, tHZ From CE or OE 25 ns CE or OE INx tZL, tZH tZL, tZH OUTx tLH tHL OUTx Output Enable Timing Input to Output Propagation Delay ORDERING INFORMATION HI-8421PSI 16 PIN PLASTIC SOIC (NARROW BODY) -40°C TO +85°C I NO SOLDER HI-8421PST 16 PIN PLASTIC SOIC (NARROW BODY) -55°C TO +125°C T NO SOLDER HOLT INTEGRATED CIRCUITS 3 PACKAGE DIMENSIONS inches (millimeters) 16-PIN PLASTIC SMALL OUTLINE (SOIC) - NB (Narrow Body) .00865 ± .00115 (.220 ± .029) .3898 ± .0039 (9.901 ± .099) .236 ± .008 (6.00 ± .20) Top View .0165 ± .0035 (.419 ± ..089) Package Type: 16HN .1535 ± .0035 (3.899 ± .089) Detail A .061 ± .007 (1.549 ± .178) 0°° to 8°° .050 ± .010 (1.270 ± .254) .033 ± .017 (.838 ± .432) HOLT INTEGRATED CIRCUITS 4 Detail A .0069 ± .0029 (.175 ± .074)