NSC 5962R8776001SSA, 5962R8776001SRA, 5962R8776001BSA, 5962R8776001BRA, 5962R8776001B2A Datasheet
...
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
nICC and IOZ reduced by 50%
nTRI-STATE outputs drive bus lines or buffer memory address registers
nOutputs source/sink 24 mA
n'ACT244 has TTL-compatible inputs
nStandard Microcircuit Drawing (SMD)
Ð'AC244: 5962-87552
Ð'ACT244: 5962-87760
Logic Symbol |
|
|
|
|
|
|
|
|
|
Pin Names |
Description |
||||
|
|
|
|
|
2 |
TRI-STATE Output Enable Inputs |
|
|
IEEE/IEC |
|
OE |
1, |
OE |
||
|
|
I0±I7 |
Inputs |
||||
|
|
|
|||||
|
|
|
O0±O7 |
Outputs |
|||
DS100282-1
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
Outputs STATE-TRI with Driver Buffer/Line Octal 54ACT244 · 54AC244
© 1998 National Semiconductor Corporation |
DS100282 |
www.national.com |
Connection Diagrams |
Truth Tables |
|
|||
|
|
|
|
|
|
Pin Assignment for DIP |
|
Inputs |
Outputs |
||
|
|
|
|
|
|
and Flatpak |
|
OE |
1 |
In |
(Pins 12, 14, 16, 18) |
|
|
L |
L |
L |
|
|
|
L |
H |
H |
|
|
|
H |
X |
Z |
|
|
|
|
|
|
|
H = HIGH Voltage Level |
|||||
L = LOW Voltage Level |
|
||||
|
|
|
|
|
|
|
Inputs |
Outputs |
|||
|
|
|
|
|
|
|
|
2 |
In |
(Pins 3, 5, 7, 9) |
|
OE |
|||||
|
L |
L |
L |
||
|
L |
H |
H |
||
|
H |
X |
Z |
||
DS100282-2
X = Immaterial
Z = High Impedance
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 National Semiconductor Sales Office/ Distributors for availability and specifications.
Supply Voltage (VCC) |
−0.5V to +7.0V |
DC Input Diode Current (IIK) |
|
VI = −0.5V |
−20 mA |
VI = VCC + 0.5V |
+20 mA |
DC Input Voltage (VI) |
−0.5V to V CC + 0.5V |
DC Output Diode Current (IOK) |
|
VO = −0.5V |
−20 mA |
VO = VCC + 0.5V |
+20 mA |
DC Output Voltage (VO) |
−0.5V to V CC + 0.5V |
DC Output Source |
|
or Sink Current (IO) |
±50 mA |
DC VCC or Ground Current |
|
per Output Pin (ICC or IGND) |
±50 mA |
Storage Temperature (TSTG) |
−65ÊC to +150ÊC |
Junction Temperature (TJ) |
|
CDIP |
175ÊC |
Recommended Operating
Conditions
Supply Voltage (VCC) |
|
|
'AC |
|
2.0V to 6.0V |
'ACT |
|
4.5V to 5.5V |
Input Voltage (VI) |
|
0V to VCC |
Output Voltage (VO) |
|
0V to VCC |
Operating Temperature (TA) |
|
|
54AC/ACT |
|
−55ÊC to +125ÊC |
Minimum Input Edge Rate ( |
V/ |
t) |
'AC Devices |
|
|
VIN from 30% to 70% of VCC |
|
|
VCC @ 3.3V, 4.5V, 5.5V |
|
125 mV/ns |
Minimum Input Edge Rate ( |
V/ |
t) |
'ACT Devices |
|
|
VIN from 0.8V to 2.0V |
|
|
VCC @ 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 |
VCC |
TA = |
Units |
Conditions |
|
|
|
(V) |
−55ÊC to +125ÊC |
|
|
|
|
|
|
|
|
|
|
|
|
|
Guaranteed Limits |
|
|
|
|
|
|
|
|
|
|
VIH |
Minimum High |
3.0 |
2.1 |
|
VOUT = 0.1V |
|
|
Level Input |
4.5 |
3.15 |
V |
or VCC − 0.1V |
|
|
Voltage |
5.5 |
3.85 |
|
|
|
|
|
|
|
|
|
|
VIL |
Maximum Low |
3.0 |
0.9 |
|
VOUT = 0.1V |
|
|
Level Input |
4.5 |
1.35 |
V |
or VCC − 0.1V |
|
|
Voltage |
5.5 |
1.65 |
|
|
|
|
|
|
|
|
|
|
VOH |
Minimum High |
3.0 |
2.9 |
|
IOUT = −50 µA |
|
|
Level Output |
4.5 |
4.4 |
V |
|
|
|
Voltage |
5.5 |
5.4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(Note 2) |
|
|
|
|
|
|
VIN = VIL or VIH |
|
|
|
3.0 |
2.4 |
|
|
−12 mA |
|
|
4.5 |
3.7 |
V |
IOH |
−24 mA |
|
|
5.5 |
4.7 |
|
|
−24 mA |
|
|
|
|
|
|
|
VOL |
Maximum Low |
3.0 |
0.1 |
|
IOUT = 50 µA |
|
|
Level Output |
4.5 |
0.1 |
V |
|
|
|
Voltage |
5.5 |
0.1 |
|
|
|
|
|
|
|
|
(Note 2) |
|
|
|
|
|
|
VIN = VIL or VIH |
|
|
|
3.0 |
0.50 |
|
|
12 mA |
|
|
4.5 |
0.50 |
V |
IOL |
24 mA |
|
|
5.5 |
0.50 |
|
|
24 mA |
IIN |
Maximum Input |
5.5 |
±1.0 |
µA |
VI = VCC, GND |
|
|
Leakage Current |
|
|
|
|
|
|
|
|
|
|
|
|
3 |
www.national.com |
Loading...