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PDF 54AC244 Data sheet ( Hoja de datos )
| Número de pieza | 54AC244 | |
| Descripción | Octal Buffer/Line Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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August 1998
54AC244 • 54ACT244
Octal Buffer/Line Driver with TRI-STATE® Outputs
General Description
The ’AC/’ACT244 is an octal buffer and line driver designed
to be employed as a memory address driver, clock driver and
bus-oriented transmitter/receiver which provides improved
PC board density.
Features
n ICC and IOZ reduced by 50%
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n ’ACT244 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’AC244: 5962-87552
— ’ACT244: 5962-87760
Logic Symbol
IEEE/IEC
Pin Names
OE1, OE2
I0– I7
O0– O7
Description
TRI-STATE Output Enable Inputs
Inputs
Outputs
DS100282-1
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100282
www.national.com
1 page  
AC Electrical Characteristics
Symbol
Parameter
tPLH Propagation Delay
Data to Output
tPHL Propagation Delay
Data to Output
tPZH
Output Enable Time
tPZL Output Enable Time
tPHZ Output Disable Time
tPLZ Output Disable Time
Note 9: Voltage Range 3.3 is 3.3V ±0.3V
Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 9)
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
AC Electrical Characteristics
Symbol
Parameter
tPLH Propagation Delay
Data to Output
tPHL Propagation Delay
Data to Output
tPZH
tPZL
tPHZ
tPLZ
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
Note 10: Voltage Range 5.0 is 5.0V ±0.5V
VCC
(V)
(Note 10)
5.0
5.0
5.0
5.0
5.0
5.0
Capacitance
Symbol
CIN
CPD
Parameter
Input Capacitance
Power Dissipation
Capacitance
Typ
4.5
45.0
Units
pF
pF
54AC
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
1.0 12.5
1.0 9.5
1.0 12.0
1.0 9.0
1.0 11.5
1.0 9.0
1.0 13.0
1.0 10.5
1.0 12.5
1.0 10.5
1.0 13.0
1.0 11.0
54ACT
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
1.0 10.0
1.0 10.0
1.0 9.5
1.0 11.0
1.0 11.0
1.0 11.5
Conditions
VCC = OPEN
VCC = 5.0V
Units
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
ns
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 54AC244.PDF ] | |
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