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PDF 54ACTQ244 Data sheet ( Hoja de datos )
| Número de pieza | 54ACTQ244 | |
| Descripción | Quiet Series Octal Buffer/Line Driver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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August 1998
54ACQ244 • 54ACTQ244
Quiet Series Octal Buffer/Line Driver with TRI-STATE®
Outputs
General Description
The ’ACQ/’ACTQ244 is an octal buffer and line driver de-
signed to be employed as a memory address driver, clock
driver and bus oriented transmitter or receiver which pro-
vides improved PC board density. The ACQ/ACTQ utilizes
NSC Quiet Series technology to guarantee quiet output
switching and improved dynamic threshold performance.
FACT Quiet Series™ features GTO™ output control and un-
dershoot corrector in addition to a split ground bus for supe-
rior performance.
Features
n ICC and IOZ reduced by 50%
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Improved latch-up immunity
n TRI-STATE outputs drive bus lines or buffer memory
address registers
n Outputs source/sink 24 mA
n Faster prop delays than the standard ’AC/’ACT244
n 4 kV minimum ESD immunity
n Standard Microcircuit Drawing (SMD)
— ’ACTQ244: 5962-92186
— ’ACQ244: 5962-92176
Logic Symbol
Connection Diagrams
IEE/IEC
Pin Assignment
for DIP and Flatpak
Pin Names
OE1, OE2
I0–I 7
O0–O 7
DS100236-1
Description
TRI-STATE Output Enable Inputs
Inputs
Outputs
GTO™ is a trademark of National Semiconductor Corporation.
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
FACT Quiet Series™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100236
DS100236-2
Pin Assignment
for LCC
DS100236-3
www.national.com
1 page  
DC Electrical Characteristics for ’ACTQ Family Devices (Continued)
54ACTQ
Symbol
Parameter
VCC −55˚C to +125˚C
(V) Guaranteed Limits
IOLD
Minimum Dynamic
(Note 10)
5.5
50
IOHD
ICC
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
−50
80.0
VOLP
VOLV
Quiet Output
Maximum Dynamic VOL
Quiet Output
Minimum Dynamic VOL
5.0
5.0
1.5
−1.2
Note 9: All outputs loaded thresholds on input associated with output under test.
Note 10: Maximum test duration 2.0 ms, one output loaded at a time.
Note 11: ICC for 54ACTQ @ 25˚C is identical to 74ACTQ @ 25˚C.
Note 12: Plastic DIP package.
Note 13: Max number of outputs defined as (n). Data Inputs are driven 0V to 3V. One output @ GND.
Units
mA
mA
µA
V
V
Conditions
VOLD = 1.65V Max
VOHD = 3.85V Min
VIN = VCC
or GND (Note 11)
(Notes 12, 13)
(Notes 12, 13)
AC Electrical Characteristics
Symbol
Parameter
VCC
(V)
(Note 14)
54ACQ
TA = −55˚C
to +125˚C
CL = 50 pF
Min Max
Units
Fig.
No.
tPHL, tPLH
Propagation Delay
Data to Output
3.3 1.0 12.5 ns
5.0 1.0 9.0
tPZL, tPZH
Output Enable Time
3.3 1.0 12.0 ns
5.0 1.0 10.0
tPHZ, tPLZ
Output Disable Time
3.3 1.0 11.5 ns
5.0 1.0 10.0
Note 14: Voltage Range 5.0 is 5.0V ±0.5V.
Voltage Range 3.3 is 3.3V ±0.3V.
Note 15: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The speci-
fication applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH). Parameter guaranteed by design.
AC Electrical Characteristics
54ACTQ
Symbol
Parameter
VCC
TA = −55˚C
Fig.
(V)
to +125˚C
Units
No.
(Note 16)
CL = 50 pF
Min Max
tPHL, tPLH
Propagation Delay
Data to Output
5.0 1.5 9.0 ns
tPZL, tPZH
tPHZ, tPLZ
Output Enable Time
Output Disable Time
5.0 1.5 10.5 ns
5.0 1.5 10.5 ns
Note 16: Voltage Range 5.0 is 5.0V ±0.5V.
Note 17: Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The speci-
fication applies to any outputs switching in the same direction, either HIGH to LOW (tOSHL) or LOW to HIGH (tOSLH). Parameter guaranteed by design.
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| PDF Descargar | [ Datasheet 54ACTQ244.PDF ] | |
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