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PDF 74AC520 Data sheet ( Hoja de datos )
| Número de pieza | 74AC520 | |
| Descripción | 8-Bit Identity Comparator | |
| Fabricantes | Fairchild Semiconductor | |
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74AC520, 74ACT520
8-Bit Identity Comparator
Features
■ Compares two 8-bit words in 6.5ns typ.
■ Expandable to any word length
■ 20-pin package
■ Outputs source/sink 24mA
■ ACT520 has TTL-compatible inputs
March 2007
tm
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.
www.DataSheet4U.com
Ordering Information
Order
Number
74AC520SC
74ACT520SC
74ACT520SJ
74ACT520PC
Package
Number
M20B
M20B
M20D
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
Connection Diagram
Pin Descriptions
Pin Names
A0–A7
B0–B7
TA = B
OA = B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
Truth Table
IA = B
L
L
H
H
Inputs
A, B
A = B(1)
A≠B
A = B(1)
A≠B
H = HIGH Voltage Level
L = LOW Voltage Level
Note:
1. A0 = B0, A1 = B1, A2 = B2, etc.
Outputs
OA = B
L
H
H
H
FACT™ is a trademark of Fairchild Semiconductor Corporation.
©1989 Fairchild Semiconductor Corporation
74AC520, 74ACT520 Rev. 1.4
www.fairchildsemi.com
1 page  
DC Electrical Characteristics for AC
Symbol
Parameter
VIH Minimum HIGH Level
Input Voltage
VCC (V) Conditions
3.0 VOUT = 0.1V or
4.5 VCC – 0.1V
TA = +25°C TA = –40°C to +85°C
Typ.
Guaranteed Limits Units
1.5 2.1
2.1
V
2.25 3.15
3.15
5.5
2.75 3.85
3.85
VIL Maximum LOW Level
Input Voltage
3.0 VOUT = 0.1V or
4.5 VCC – 0.1V
1.5 0.9
2.25 1.35
0.9
1.35
V
5.5
2.75 1.65
1.65
VOH Minimum HIGH Level
Output Voltage
3.0 IOUT = –50µA
4.5
2.99 2.9
4.49 4.4
2.9
4.4
V
5.5
5.49 5.4
5.4
VOL Maximum LOW Level
Output Voltage
VIN = VIL or VIH:
3.0 IOH = –12mA
4.5 IOH = –24mA
5.5 IOH = –24mA(2)
3.0 IOUT = 50µA
4.5
0.002
0.001
2.56
3.86
4.86
0.1
0.1
2.46
3.76
4.76
0.1
0.1
V
5.5
0.001 0.1
0.1
VIN = VIL or VIH:
3.0 IOL = 12mA
4.5 IOL = 24mA
5.5 IOL = 24mA(2)
IIN(4) Maximum Input Leakage 5.5 VI = VCC, GND,
Current
A Inputs Only
0.36
0.36
0.36
±0.1
0.44
0.44
0.44
±1.0
µA
IIH Maximum Input HIGH
Leakage Current
5.5 VI = VCC,
B Inputs Only
10.0 10.0 µA
IIL Maximum Input LOW
Leakage Current
5.5 VI = VCC,
B Inputs Only
–0.3 –0.6
–1.0
mA
IOLD
IOHD
ICC
ICC(4)
Minimum Dynamic
Output Current(3)
Maximum Quiescent
Supply Current
Maximum Quiescent
Supply Current
5.5 VOLD = 1.65V Max.
5.5 VOHD = 3.85V Min.
5.5 VIN = VCC
4.0
5.5 VIN = GND
2.3 4.8
75
–75
40.0
8.0
mA
mA
µA
mA
Notes:
2. All outputs loaded; thresholds on input associated with output under test.
3. Maximum test duration 2.0ms, one output loaded at a time.
4. IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC.
©1989 Fairchild Semiconductor Corporation
74AC520, 74ACT520 Rev. 1.4
5
www.fairchildsemi.com
5 Page 
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an
exhaustive list of all such trademarks.
ACEx®
Across the board. Around the world.¥
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CTL™
Current Transfer Logic™
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EnSigna¥
FACT Quiet Series™
FACT®
FAST®
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FRFET®
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ImpliedDisconnect¥
IntelliMAX¥
ISOPLANAR¥
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OPTOLOGIC®
OPTOPLANAR®
PACMAN¥
POP¥
Power220®
Power247®
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PowerTrench®
Programmable Active Droop¥
QFET®
QS¥
QT Optoelectronics¥
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RapidConnect¥
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SMART START¥
SPM®
STEALTH™
SuperFET¥
SuperSOT¥-3
SuperSOT¥-6
SuperSOT¥-8
SyncFET™
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The Power Franchise®
™
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DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER
ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD 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 (c) 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 of the user.
2. A critical component in 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.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification Product Status
Advance Information
Formative or In Design
Preliminary
First Production
No Identification Needed Full Production
Obsolete
Not In Production
Definition
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I24
©1989 Fairchild Semiconductor Corporation
74AC520, 74ACT520 Rev. 1.4
11
www.fairchildsemi.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet 74AC520.PDF ] | |
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