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PDF 54AC520 Data sheet ( Hoja de datos )
| Número de pieza | 54AC520 | |
| Descripción | 8-Bit Identity Comparator | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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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 ex-
pansion input IA = B also serves as an active LOW enable in-
put.
Features
n Compares two 8-bit words in 6.5 ns typ
n Expandable to any word length
n 20-pin package
n Outputs source/sink 24 mA
n ’ACT520 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
54AC520: 5962-90916
54ACT520: 5962-89793
Logic Symbols
IEEE/IEC
DS100234-1
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
DS100234-4
www.national.com
1 page  
DC Characteristics for ’AC Family Devices (Continued)
Symbol
IIL
IOLD
IOHD
ICC
ICC
Parameter
Maximum Input
Low Leakage Current
Minimum Dynamic
(Note 3)
Output Current
Maximum Quiescent
Supply Current
Maximum Quiescent
Supply Current
VCC
(V)
5.5
5.5
5.5
5.5
5.5
54AC
TA =
−55˚C to +125˚C
Guaranteed Limits
−1.5
50
−50
80.0
8.0
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.
Units
mA
mA
mA
µA
mA
Conditions
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
VIH Minimum High Level
Input Voltage
VIL Maximum Low Level
Input Voltage
VOH Minimum High Level
Output Voltage
VCC
(V)
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
4.5
5.5
VOL
Maximum Low Level
4.5
Output Voltage
5.5
3.70
4.70
0.1
0.1
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
4.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
5.5
0.50
0.50
±1.0
10.0
−1.0
1.6
50
−50
80.0
Units
Conditions
V VOUT = 0.1V
or VCC − 0.1V
V VOUT = 0.1V
or VCC − 0.1V
V IOUT = −50 µA
(Note 4)
VIN = VILor VIH
V IOH = −24 mA
IOH = −24 mA
V IOUT = 50 µA
(Note 4)
VIN = VILor VIH
V IOL = 24 mA
IOL = 24 mA
µA VI = VCC, GND
µA VI = VCC
B Inputs Only
mA VI = VCC
B Inputs Only
mA VI = VCC − 2.1V
mA VOLD = 1.65V Max
mA VOHD = 3.85V Min
µA VIN = VCC
or GND
5 www.national.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 54AC520.PDF ] | |
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