NSC 5962R8776001SSA, 5962R8776001SRA, 5962R8776001BSA, 5962R8776001BRA, 5962R8776001B2A Datasheet
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54AC244•54ACT244
Octal Buffer/Line Driver with TRI-STATE
®
Outputs
General Description
The ’AC/’ACT244 is an octal buffer and line driver designed
to beemployed as a memory address driver, clockdriver and
bus-oriented transmitter/receiver which provides improved
PC board density.
Features
n ICCand IOZreduced 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
Pin Names Description
OE
1
,OE2TRI-STATE Output Enable Inputs
I
0–I7
Inputs
O
0–O7
Outputs
TRI-STATE®is a registered trademark of National Semiconductor Corporation.
FACT
®
is a registered trademark of Fairchild Semiconductor Corporation.
IEEE/IEC
DS100282-1
August 1998
54AC244
•
54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
© 1998 National Semiconductor Corporation DS100282 www.national.com
Connection Diagrams Truth Tables
Inputs Outputs
OE
1In
(Pins 12, 14, 16, 18)
LL L
LH H
HX Z
H=HIGH Voltage Level
L=LOW Voltage Level
Inputs Outputs
OE
2In
(Pins 3, 5, 7, 9)
LL L
LH H
HX Z
X=Immaterial
Z=High Impedance
Pin Assignment for DIP
and Flatpak
DS100282-2
Pin Assignment for LCC
DS100282-3
www.national.com 2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the NationalSemiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
CC
) −0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
=
−0.5V −20 mA
V
I
=
V
CC
+ 0.5V +20 mA
DC Input Voltage (V
I
) −0.5V to VCC+ 0.5V
DC Output Diode Current (I
OK
)
V
O
=
−0.5V −20 mA
V
O
=
V
CC
+ 0.5V +20 mA
DC Output Voltage (V
O
) −0.5V to VCC+ 0.5V
DC Output Source
or Sink Current (I
O
)
±
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
±
50 mA
Storage Temperature (T
STG
) −65˚C to +150˚C
Junction Temperature (T
J
)
CDIP 175˚C
Recommended Operating
Conditions
Supply Voltage (VCC)
’AC 2.0V to 6.0V
’ACT 4.5V to 5.5V
Input Voltage (V
I
) 0VtoV
CC
Output Voltage (VO) 0VtoV
CC
Operating Temperature (TA)
54AC/ACT −55˚C to +125˚C
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
V
IN
from 30%to 70%of V
CC
V
CC
@
3.3V, 4.5V, 5.5V 125 mV/ns
Minimum Input Edge Rate (∆V/∆t)
’ACT Devices
V
IN
from 0.8V to 2.0V
V
CC
@
4.5V, 5.5V 125 mV/ns
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur.The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recommend operation of FACT
®
circuits outside databook specifications.
DC Characteristics for ’AC Family Devices
54AC
Symbol Parameter V
CC
T
A
=
Units Conditions
(V) −55˚C to +125˚C
Guaranteed Limits
V
IH
Minimum High 3.0 2.1 V
OUT
=
0.1V
Level Input 4.5 3.15 V or V
CC
− 0.1V
Voltage 5.5 3.85
V
IL
Maximum Low 3.0 0.9 V
OUT
=
0.1V
Level Input 4.5 1.35 V or V
CC
− 0.1V
Voltage 5.5 1.65
V
OH
Minimum High 3.0 2.9 I
OUT
=
−50 µA
Level Output 4.5 4.4 V
Voltage 5.5 5.4
(Note 2)
V
IN
=
V
IL
or V
IH
3.0 2.4 −12 mA
4.5 3.7 V I
OH
−24 mA
5.5 4.7 −24 mA
V
OL
Maximum Low 3.0 0.1 I
OUT
=
50 µA
Level Output 4.5 0.1 V
Voltage 5.5 0.1
(Note 2)
V
IN
=
V
IL
or V
IH
3.0 0.50 12 mA
4.5 0.50 V I
OL
24 mA
5.5 0.50 24 mA
I
IN
Maximum Input 5.5
±
1.0 µA V
I
=
V
CC
, GND
Leakage Current
3 www.national.com
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