8-Bit Identity Comparator

www.DataSheet4U.com 54AC520 • 54ACT520 8-Bit Identity Comparator September 1998 54AC520 • 54ACT520 8-Bit Identity Comparator General Description The ’AC/’ACT520 are expandable 8-bit comparators. They compare two words of up to eight bits each and provide a LOW output when the two words match bit for bit. The expansion input IA = B also serves as an active LOW enable input. n n n n n Expandable to any word length 20-pin package Outputs source/sink 24 mA ’ACT520 has TTL-compatible inputs Standard Microcircuit Drawing (SMD) 54AC520: 5962-90916 54ACT520: 5962-89793 Features n Compares two 8-bit words in 6.5 ns typ Logic Symbols IEEE/IEC DS100234-1 DS100234-4 Pin Names A0–A7 B0–B7 TA = B OA = B Description Word A Inputs Word B Inputs Expansion or Enable Input Identity Output FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100234 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100234-3 DS100234-2 Truth Table Inputs IA = B L L H H A, B A = B* A≠B A = B* A≠B Outputs OA = B L H H H H = HIGH Voltage Level L = LOW Voltage Level *A0 = B0, A1 = B1, A2 = B2, etc. www.national.com 2 Logic Diagram DS100234-5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 3 www.national.com Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V Recommended Operating Conditions Supply Voltage (VCC) ’AC ’ACT Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC/ACT Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (∆V/∆t) ’ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns ±50 mA ±50 mA −65˚C to +150˚C 175˚C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation of FACT™ circuits outside databook specifications. DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) VIH Minimum High Level Input Voltage VIL Maximum Low Level Input Voltage VOH Minimum High Level Output Voltage 3.0 4.5 5.5 3.0 4.5 5.5 3.0 4.5 5.5 54AC TA = −55˚C to +125˚C Guaranteed Limits 2.1 3.15 3.85 0.9 1.35 1.65 2.9 4.4 5.4 (Note 2) VIN = VILor VIH 3.0 4.5 5.5 VOL Maximum Low Level Output Voltage 3.0 4.5 5.5 2.4 3.7 4.7 0.1 0.1 0.1 (Note 2) VIN = VILor VIH 3.0 4.5 5.5 IIN IIH Maximum Input Leakage Current Maximum Input High Leakage Current 5.5 20.0 µA 5.5 0.50 0.50 0.50 V µA IOL = 12 mA IOL = 24 mA IOL = 24 mA VI = VCC, GND A Inputs Only VI = VCC B Inputs Only V V IOH = −12 mA IOH = −24 mA IOH = −24 mA IOUT = 50 µA V IOUT = −50 µA V VOUT = 0.1V or VCC − 0.1V V VOUT = 0.1V or VCC − 0.1V Units Conditions ±1.0 www.national.com 4 DC Characteristics for ’AC Family Devices Symbol Parameter VCC (V) IIL IOLD IOHD ICC ICC Maximum Input Low Leakage Current Minimum Dynamic (Note 3) Output Current Maximum Quiescent Supply Current Maximum Quiescent Supply Current Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. (Continued) 54AC TA = −55˚C to +125˚C Guaranteed Limits −1.5 50 −50 80.0 8.0 Units Conditions 5.5 5.5 5.5 5.5 5.5 mA mA mA µA mA VI = VCC B Inputs Only VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC VIN = GND DC Characteristics for ’ACT Family Devices Symbol Parameter VCC (V) VIH VIL VOH Minimum High Level Input Voltage Maximum Low Level Input Voltage Minimum High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 54ACT TA = −55˚C to +125˚C Guaranteed Limits 2.0 2.0 0.8 0.8 4.4 5.4 (Note 4) VIN = VILor VIH 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 3.70 4.70 0.1 0.1 (Note 4) VIN = VILor VIH 4.5 5.5 IIN IIH IIL ICCT IOLD IOHD ICC Maximum Input Leakage Current Maximum Input High Leakage Current Maximum Input Low Leakage Current Maximum ICC/Input Minimum Dynamic (Note 5) Output Current Maximum Quiescent Supply Current 5.5 5.5 5.5 50 −50 80.0 mA mA µA VOLD = 1.65V Max VOHD = 3.85V Min VIN = VCC or GND 5.5 1.6 mA 5.5 −1.0 mA 5.5 10.0 µA VI = VCC B Inputs Only VI = VCC B Inputs Only VI = VCC − 2.1V 5.5 0.50 0.50 V µA IOL = 24 mA IOL = 24 mA VI = VCC, GND V V IOH = −24 mA IOH = −24 mA IOUT = 50 µA V V V VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA Units Conditions ±1.0 5 www.national.com DC Characteristics for ’ACT Family Devices Symbol Parameter VCC (V) ICC Maximum Quiescent Supply Current Note 4: All outputs loaded; thresholds on input associated with output under test. Note 5: Maximum test duration 2.0 ms, one output loaded at a time. (Continued) 54ACT TA = −55˚C to +125˚C Guaranteed Limits 8.0 Units Conditions 5.5 mA VIN = GND AC Electrical Characteristics VCC Symbol Parameter (V) (Note 6) Min tPLH tPHL tPLH tPHL Propagation Delay An or Bn to OA An or Bn to OA IA IA =B =B 54AC TA = −55˚C to +125˚C CL = 50 pF Max 14.0 10.5 15.0 11.0 10.0 7.5 10.5 8.0 ns ns ns ns 1.0 1.5 1.0 1.5 1.0 1.5 1.0 1.5 Units Fig. No. 3.3 5.0 3.3 5.0 3.3 5.0 3.3 5.0 Propagation Delay =B Propagation Delay to OA to OA =B Propagation Delay =B =B Note 6: Voltage Range 3.3 is 3.3V ±0.3V Voltage Range 5.0 is 5.0V ±0.5V AC Electrical Characteristics VCC Symbol Parameter (V) (Note 7) Min tPLH tPHL tPLH tPHL Propagation Delay An or Bn to OA An or Bn to OA IA IA =B =B 54ACT TA = −55˚C to +125˚C CL = 50 pF Max 12.0 12.0 8.5 9.0 ns ns ns ns 1.5 1.5 1.5 1.5 Units Fig. No. 5.0 5.0 5.0 5.0 Propagation Delay =B Propagation Delay to OA to OA =B Propagation Delay =B =B Note 7: Voltage Range 5.0 is 5.0V ±0.5V Capacitance Symbol CIN CPD Parameter Input Capacitance Power Dissipation Capacitance Typ 4.5 40 Units pF pF Conditions VCC = OPEN VCC = 5.0V www.national.com 6 Applications Ripple Expansion DS100234-6 Parallel Expansion DS100234-7 7 www.national.com 8 Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 20 Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 9 www.national.com 54AC520 • 54ACT520 8-Bit Identity Comparator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20 Lead Ceramic Flatpak (F) NS Package Number W20A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 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