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54ACT821 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer 54ACT821
Beschreibung 10-Bit D Flip-Flop
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 8 Seiten
54ACT821 Datasheet, Funktion
www.DataSheet4U.com
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
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54ACT821 Datasheet, Funktion
AC Electrical Characteristics (Continued)
Symbol
Parameter
tPZL Output Enable Time
OE to On
tPHZ Output Disable Time
OE to On
tPLZ Output Disable Time
OE to On
Note 12: Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 12)
5.0
5.0
5.0
54ACT
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
1.5 13.0
1.5 13.5
1.5 12.5
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 13: Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 13)
5.0
5.0
5.0
54ACT
TA = −55˚C
to +125˚C
CL = 50 pF
Guaranteed Minimum
4.0
3.0
6.0
Capacitance
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation
Capacitance
Typ
4.5
35.0
Units
pF
pF
Conditions
VCC = OPEN
VCC = 5.0V
Units
ns
ns
ns
Units
ns
ns
ns
Fig.
No.
Fig.
No.
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