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PDF 74AC520SC Data sheet ( Hoja de datos )
| Número de pieza | 74AC520SC | |
| Descripción | 8-Bit Identity Comparator | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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February 1989
Revised November 1999
74AC520 • 74ACT520
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.
Features
s Compares two 8-bit words in 6.5 ns typ
s Expandable to any word length
s 20-pin package
s Outputs source/sink 24 mA
s ACT520 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74AC520PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACT520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACT520SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACT520PC
N20A
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 code.
Logic Symbols
Connection Diagram
IEEE/IEC
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
FACT is a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010194
www.fairchildsemi.com
1 page  
AC Electrical Characteristics for AC
Symbol
Parameter
tPLH Propagation Delay
An or Bn to O A = B
tPHL Propagation Delay
An or Bn to OA = B
tPLH Propagation Delay
IA = B to OA = B
tPHL Propagation Delay
IA = B to OA = B
Note 8: Voltage Range 3.3 is 3.3V ± 0.3V
Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 8)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
TA = +25°C
CL = 50 pF
Min Typ Max
4.0 7.5 11.5
2.5 5.5 8.5
4.5 8.0 12.0
3.0 5.5 9.0
3.5 5.5 8.5
2.5 4.5 6.5
3.5 5.5 8.5
2.5 4.5 6.5
AC Electrical Characteristics for ACT
Symbol
Parameter
tPLH Propagation Delay
An or Bn to OA = B
tPHL Propagation Delay
An or Bn to OA = B
tPLH Propagation Delay
IA = B to OA = B
tPHL Propagation Delay
IA = B to OA = B
Note 9: Voltage Range 5.0 is 5.0V ± 0.5V
VCC
(V)
(Note 9)
5.0
5.0
5.0
5.0
TA = +25°C
CL = 50 pF
Min Typ Max
3.0 5.5 8.5
3.0 6.0 10.0
2.0 4.0 6.0
2.5 5.0 7.5
Capacitance
TA = −40°C to +85°C
CL = 50 pF
Min Max
3.0 13.0
2.0 9.5
3.5 13.5
2.5 10.0
2.5 9.5
2.0 7.0
2.5 9.5
2.0 7.0
TA = −40°C to +85°C
CL = 50 pF
Min Max
2.5 9.5
2.5 11.5
2.0 6.5
2.0 8.5
Units
ns
ns
ns
ns
Units
ns
ns
ns
ns
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation Capacitance
Typ Units
Conditions
4.5 pF VCC = OPEN
40 pF VCC = 5.0V
5 www.fairchildsemi.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 74AC520SC.PDF ] | |
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