54AC/74AC520 # 54ACT/74ACT520 8-Bit Identity Comparator General Description Features 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 e B also serves as an active LOW enable input. Y Y Y Y Y Compares two 8-bit words in 6.5 ns typ Expandable to any word length 20-pin package Outputs source/sink 24 mA 'ACT520 has TTL-compatible inputs Logic Symbols Connection Diagrams Pin Assignment for DIP, Flatpak and SOIC TL/F/10194 - 1 IEEE/IEC TL/F/10194 - 2 Pin Assignment for LCC TL/F/10194 - 3 TL/F/10194 - 4 Pin Names A0 - A7 B0 - B7 TA e B OA e B Description Word A Inputs Word B Inputs Expansion or Enable Input Identity Output FACTTM is a trademark of National Semiconductor Corporation. C1995 National Semiconductor Corporation TL/F/10194 RRD-B30M105/Printed in U. S. A. 54AC/74AC520 # 54ACT/74ACT520 8-Bit Identity Comparator April 1993 Truth Table Inputs Outputs IA e B A, B OA e B L L H H A e B* AiB A e B* AiB L H H H H e HIGH Voltage Level L e LOW Voltage Level *A0 e B0, A1 e B1, A2 e B2, etc. Logic Diagram TL/F/10194 - 5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 2 Absolute Maximum Rating (Note 1) Recommended Operating Conditions 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 e b0.5V VI e VCC a 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO e b0.5V VO e VCC a 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 PDIP Supply Voltage (VCC) 'AC 'ACT Input Voltage (VI) b 0.5V to a 7.0V b 20 mA a 20 mA 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC Output Voltage (VO) Operating Temperature (TA) 74AC/ACT 54AC/ACT b 0.5V to VCC a 0.5V b 20 mA a 20 mA b 40 C to a 85 C b 55 C to a 125 C Minimum Input Edge Rate (DV/Dt) 'AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (DV/Dt) 'ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V b 0.5V to VCC a 0.5V g 50 mA g 50 mA b 65 C to a 150 C 125 mV/ns 125 mV/ns 175 C 140 C 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 TM circuits outside databook specifications. DC Characteristics for 'AC Family Devices Symbol Parameter VCC (V) 74AC 54AC 74AC TA e a 25 C TA e b 55 C to a 125 C TA e b 40 C to a 85 C Typ VIH VIL VOH Conditions Guaranteed Limits Minimum High Level Input Voltage 3.0 4.5 5.5 1.5 2.25 2.75 2.1 3.15 3.85 2.1 3.15 3.85 2.1 3.15 3.85 V VOUT e 0.1V or VCC b 0.1V Maximum Low Level Input Voltage 3.0 4.5 5.5 1.5 2.25 2.75 0.9 1.35 1.65 0.9 1.35 1.65 0.9 1.35 1.65 V VOUT e 0.1V or VCC b 0.1V Minimum High Level Output Voltage 3.0 4.5 5.5 2.99 4.49 5.49 2.9 4.4 5.4 2.9 4.4 5.4 2.9 4.4 5.4 V 2.56 3.86 4.86 2.4 3.7 4.7 2.46 3.76 4.76 V 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 V 3.0 4.5 5.5 0.36 0.36 0.36 0.50 0.50 0.50 0.44 0.44 0.44 V 3.0 4.5 5.5 VOL Units Maximum Low Level Output Voltage 3.0 4.5 5.5 0.002 0.001 0.001 IOUT e b50 mA *VIN e VIL or VIH b 12 mA b 24 mA IOH b 24 mA IOUT e 50 mA *VIN e VIL or VIH 12 mA IOL 24 mA 24 mA IIN Maximum Input Leakage Current 5.5 g 0.1 g 1.0 g 1.0 mA VI e VCC, GND A Inputs Only IIH Maximum Input High Leakage Current 5.5 10.0 10.0 10.0 mA VI e VCC B Inputs Only IIL Maximum Input Low Leakage Current 5.5 b 0.6 b 1.0 b 1.0 mA VI e VCC B Inputs Only b 0.3 *All outputs loaded; thresholds on input associated with output under test. 3 DC Characteristics for 'AC Family Devices (Continued) Symbol Parameter VCC (V) 74AC 54AC 74AC TA e a 25 C TA e b 55 C to a 125 C TA e b 40 C to a 85 C Typ IOLD IOHD Minimum Dynamic Output Current Units Conditions Guaranteed Limits 5.5 50 75 mA VOLD e 1.65V Max 5.5 b 50 b 75 mA VOHD e 3.85V Min 4.0 80.0 40.0 mA VIN e VCC 4.8 8.0 8.0 mA VIN e GND ICC Maximum Quiescent Supply Current 5.5 ICC Maximum Quiescent Supply Current 5.5 2.3 Maximum test duration 2.0 ms, one output loaded at a time. Note: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit ICC for 54AC @ 25 C is identical to 74AC @ 25 C. @ 5.5V VCC. DC Characteristics for 'ACT Family Devices Symbol Parameter VCC (V) 74ACT 54ACT 74ACT TA e a 25 C TA e b 55 C to a 125 C TA e b 40 C to a 85 C Typ Units Conditions Guaranteed Limits VIH Minimum High Level Input Voltage 4.5 5.5 1.5 1.5 2.0 2.0 2.0 2.0 2.0 2.0 V VOUT e 0.1V or VCC b 0.1V VIL Maximum Low Level Input Voltage 4.5 5.5 1.5 1.5 0.8 0.8 0.8 0.8 0.8 0.8 V VOUT e 0.1V or VCC b 0.1V VOH Minimum High Level Output Voltage 4.5 5.5 4.49 5.49 4.4 5.4 4.4 5.4 4.4 5.4 V 3.86 4.86 3.70 4.70 3.76 4.76 V 0.1 0.1 0.1 0.1 0.1 0.1 V 4.5 5.5 0.36 0.36 0.50 0.50 0.44 0.44 V 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 0.001 0.001 IOUT e b50 mA *VIN e VIL or VIH b 24 mA IOH b 24 mA IOUT e 50 mA *VIN e VIL or VIH 24 mA IOL 24 mA IIN Maximum Input Leakage Current 5.5 g 0.1 g 1.0 g 1.0 mA IIH Maximum Input High Leakage Current 5.5 10.0 10.0 10.0 mA VI e VCC B Inputs Only IIL Maximum Input Low Leakage Current 5.5 b 0.3 b 0.6 b 1.0 b 1.0 mA VI e VCC B Inputs Only ICCT Maximum ICC/Input 5.5 0.6 1.6 1.5 mA VI e VCC b 2.1V IOLD Minimum Dynamic Output Current 5.5 50 75 mA VOLD e 1.65V Max 5.5 b 50 b 75 mA VOHD e 3.85V Min 4.0 80.0 40.0 mA VIN e VCC or GND 4.8 8.0 8.0 mA IOHD ICC Maximum Quiescent Supply Current 5.5 ICC Maximum Quiescent Supply Current 5.5 2.3 *All outputs loaded; thresholds on input associated with output under test. Maximum test duration 2.0 ms, one output loaded at a time. Note: ICC for 54ACT @ 25 C is identical to 74ACT @ 25 C. 4 VI e VCC, GND VIN e GND AC Electrical Characteristics 74AC 54AC 74AC TA e a 25 C CL e 50 pF TA e b55 C to a 125 C CL e 50 pF TA e b40 C to a 85 C CL e 50 pF Parameter VCC* (V) Min Typ Max Min Max Min Max tPLH Propagation Delay An or Bn to OA e B 3.3 5.0 4.0 2.5 7.5 5.5 11.5 8.5 1.0 1.5 14.0 10.5 3.0 2.0 13.0 9.5 ns tPHL Propagation Delay An or Bn to OA e B 3.3 5.0 4.5 3.0 8.0 5.5 12.0 9.0 1.0 1.5 15.0 11.0 3.5 2.5 13.5 10.0 ns tPLH Propagation Delay IA e B to OA e B 3.3 5.0 3.5 2.5 5.5 4.5 8.5 6.5 1.0 1.5 10.0 7.5 2.5 2.0 9.5 7.0 ns tPHL Propagation Delay IA e B to OA e B 3.3 5.0 3.5 2.5 5.5 4.5 8.5 6.5 1.0 1.5 10.5 8.0 2.5 2.0 9.5 7.0 ns Symbol Units *Voltage Range 3.3 is 3.3V g 0.3V Voltage Range 5.0 is 5.0V g 0.5V AC Electrical Characteristics Symbol Parameter VCC* (V) 74ACT 54ACT 74ACT TA e a 25 C CL e 50 pF TA e b55 C to a 125 C CL e 50 pF TA e b40 C to a 85 C CL e 50 pF Units Min Typ Max Min Max Min Max 5.0 3.0 5.5 8.5 1.5 12.0 2.5 9.5 ns Propagation Delay An or Bn to OA e B 5.0 3.0 6.0 10.0 1.5 12.0 2.5 11.5 ns tPLH Propagation Delay IA e B to OA e B 5.0 2.0 4.0 6.0 1.5 8.5 2.0 6.5 ns tPHL Propagation Delay IA e B to OA e B 5.0 2.5 5.0 7.5 1.5 9.0 2.0 8.5 ns tPLH Propagation Delay An or Bn to OA e B tPHL *Voltage Range 5.0 is 5.0V g 0.5V 5 Capacitance Typ Units Conditions CIN Symbol Input Capacitance Parameter 4.5 pF VCC e OPEN CPD Power Dissipation Capacitance 40 pF VCC e 5.0V Applications Ripple Expansion TL/F/10194 - 6 Parallel Expansion TL/F/10194 - 7 Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows: 74AC 520 P Temperature Range Family 74AC e Commercial 54AC e Military 74ACT e Commercial TTL-Compatible 54ACT e Military TTL-Compatible C QR Special Variations X e Devices shipped in 13x reels QR e Commercial grade device with burn-in QB e Military grade device with environmental and burn-in processing shipped in tubes Device Type Package Code P e Plastic DIP D e Ceramic DIP F e Flatpak L e Leadless Ceramic Chip Carrier (LCC) S e Small Outline (SOIC) Temperature Range C e Commercial (b40 C to a 85 C) M e Military (b55 C to a 125 C) 6 7 Physical Dimensions inches (millimeters) 20 Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 20 Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 8 Physical Dimensions inches (millimeters) (Continued) 20 Lead Small Outline Integrated Circuit (S) NS Package Number M20B 20 Lead Plastic Dual-In-Line Package (P) NS Package Number N20B 9 54AC/74AC520 # 54ACT/74ACT520 8-Bit Identity Comparator Physical Dimensions inches (millimeters) (Continued) Lit. Y 114820 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: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure 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. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 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