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PDF 54AC821 Data sheet ( Hoja de datos )
| Número de pieza | 54AC821 | |
| Descripción | 10-Bit D Flip-Flop | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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August 1998
54AC821 • 54ACT821
10-Bit D Flip-Flop with TRI-STATE® Outputs
General Description
The ’AC/’ACT821 is a 10-bit D flip-flop with TRI-STATE out-
puts arranged in a broadside pinout.
The ’AC/’ACT821 is functionally identical to the AM29821.
Features
n TRI-STATE outputs for bus interfacing
n Noninverting outputs
n Outputs source/sink 24 mA
n ’ACT821 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’ACT821: 5962-88705
— ’AC821: 5962-91606
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP and Flatpak
IEEE/IEC
DS100355-1
Pin Names
D0– D9
O0– O9
OE
CP
DS100355-2
Description
Data Inputs
Data Outputs
Output Enable Input
Clock Input
DS100355-3
Pin Assignment for LCC
DS100355-4
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100355
www.national.com
1 page  
AC Electrical Characteristics
Symbol
Parameter
fmax Maximum Clock
Frequency
tPLH Propagation Delay
CP to On
tPHL Propagation Delay
CP to On
tPZH Output Enable Time
OE to On
tPZL Output Enable Time
OE to On
tPHZ Output Disable Time
OE to On
tPLZ Output Disable Time
OE to On
Note 8: Voltage Range 3.3 is 3.3V ±0.3V
Note 9: 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
3.3
5.0
3.3
5.0
3.3
5.0
54AC
TA = −55˚C to +125˚C
CL = 50 pF
Min Max
95
100
1.0 13.0
1.5 9.5
1.0 13.0
1.5 9.5
1.0 13.0
1.5 9.5
1.0 13.0
1.5 9.5
1.0 12.0
1.5 10.0
1.0 12.0
1.5 10.0
AC Operating Requirements
Symbol
Parameter
ts Setup Time, HIGH or LOW
Dn to CP
th Hold Time, HIGH or LOW
Dn to CP
tw CP Pulse Width
HIGH or LOW
Note 10: Voltage Range 3.3 is 3.3V ±0.3V
Note 11: Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 10)
3.3
5.0
3.3
5.0
3.3
5.0
54AC
TA = −55˚C to +125˚C
CL = 50 pF
Guaranteed Minimum
3.0
3.0
3.0
3.0
6.0
5.0
AC Electrical Characteristics
Symbol
Parameter
fmax Maximum Clock
Frequency
tPLH Propagation Delay
CP to On
tPHL Propagation Delay
CP to On
tPZH Output Enable Time
OE to On
VCC
(V)
(Note 12)
5.0
5.0
5.0
5.0
54ACT
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
85
1.5 11.5
1.5 11.5
1.5 12.5
5
Units
MHz
ns
ns
ns
ns
ns
ns
Fig.
No.
Units
ns
ns
ns
Fig.
No.
Units
MHz
ns
ns
ns
Fig.
No.
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 54AC821.PDF ] | |
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