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Part: 54ACT520F
Category:
Analog & Mixed-Signal Processing
-> Comparators
Description: 8-bit Identity Comparator
Company: National Semiconductor Corporation
Datasheet: Download 54ACT520F datasheet File size : 275 kB
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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
FACTTM is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100234
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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* AB A = B* AB Outputs OA = B L H H H
H = HIGH Voltage Level L = LOW Voltage Level *A0 = B0, A1 = B1, A2 = B2, etc.
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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.
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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 FACTTM 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
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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
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