NSC 54ACT244F

54AC244 • 54ACT244
Octal Buffer/Line Driver with TRI-STATE ® Outputs
General Description
Features
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.
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
Pin Names
IEEE/IEC
Description
OE1, OE2
TRI-STATE Output Enable Inputs
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.
© 1998 National Semiconductor Corporation
DS100282
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54AC244 • 54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
August 1998
Connection Diagrams
Truth Tables
Inputs
Pin Assignment for DIP
and Flatpak
OE1
Outputs
In
(Pins 12, 14, 16, 18)
L
L
L
L
H
H
H
X
Z
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs
OE2
Outputs
In
L
L
L
L
H
H
H
X
Z
DS100282-2
X = Immaterial
Z = High Impedance
Pin Assignment for LCC
DS100282-3
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2
(Pins 3, 5, 7, 9)
Absolute Maximum Ratings (Note 1)
Recommended Operating
Conditions
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI = −0.5V
VI = VCC + 0.5V
DC Input Voltage (VI)
DC Output Diode Current (IOK)
VO = −0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source
or Sink Current (IO)
DC VCC or Ground Current
per Output Pin (ICC or IGND)
Storage Temperature (TSTG)
Junction Temperature (TJ)
CDIP
Supply Voltage (VCC)
’AC
’ACT
Input Voltage (VI)
Output Voltage (VO)
Operating Temperature (TA)
54AC/ACT
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
’ACT Devices
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V
−0.5V to +7.0V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
± 50 mA
± 50 mA
−65˚C to +150˚C
2.0V to 6.0V
4.5V to 5.5V
0V to VCC
0V to VCC
−55˚C to +125˚C
125 mV/ns
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.
175˚C
DC Characteristics for ’AC Family Devices
Symbol
Parameter
VCC
54AC
TA =
(V)
−55˚C to +125˚C
Units
Conditions
Guaranteed Limits
VIH
VIL
VOH
Minimum High
3.0
2.1
Level Input
4.5
3.15
Voltage
5.5
3.85
Maximum Low
3.0
0.9
Level Input
4.5
1.35
Voltage
5.5
1.65
Minimum High
3.0
2.9
Level Output
4.5
4.4
Voltage
5.5
5.4
VOUT = 0.1V
V
or VCC − 0.1V
V
or VCC − 0.1V
VOUT = 0.1V
IOUT = −50 µA
V
(Note 2)
VIN = VIL or VIH
VOL
3.0
2.4
4.5
3.7
5.5
4.7
Maximum Low
3.0
0.1
Level Output
4.5
0.1
Voltage
5.5
0.1
−12 mA
V
IOH
−24 mA
−24 mA
IOUT = 50 µA
V
(Note 2)
VIN = VIL or VIH
IIN
Maximum Input
3.0
0.50
4.5
0.50
5.5
0.50
5.5
± 1.0
12 mA
V
IOL
24 mA
24 mA
µA
VI = VCC, GND
Leakage Current
3
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DC Characteristics for ’AC Family Devices
Symbol
Parameter
(Continued)
VCC
54AC
TA =
(V)
−55˚C to +125˚C
Units
Conditions
Guaranteed Limits
IOZ
5.5
± 5.0
µA
VI (OE) = VIL, VIH
VI = VCC, VGND
VO = VCC, GND
5.5
50
mA
VOLD = 1.65V Max
5.5
−50
mA
VOHD = 3.85V Min
5.5
80.0
µA
VIN = VCC
Maximum
TRI-STATE
Current
IOLD
IOHD
(Note 3) Minimum
Dynamic Output
Current
ICC
Maximum Quiescent
Supply Current
or GND
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC.
Note 5: ICC for 54AC @ 25˚C is identical to 74AC @ 25˚C.
DC Characteristics for ’ACT Family Devices
Symbol
Parameter
VCC
54ACT
TA =
(V)
−55˚C to +125˚C
Units
Conditions
Guaranteed Limits
VIH
VIL
VOH
Minimum High Level
4.5
2.0
Input Voltage
5.5
2.0
Maximum Low Level
4.5
0.8
Input Voltage
5.5
0.8
Minimum High Level
4.5
4.4
Output Voltage
5.5
5.4
V
VOUT = 0.1V
V
or VCC − 0.1V
VOUT = 0.1V
V
or VCC − 0.1V
IOUT = −50 µA
(Note 6)
VIN = VIL or VIH
VOL
4.5
3.70
5.5
4.70
Maximum Low Level
4.5
0.1
Output Voltage
5.5
0.1
V
IOH
−24 mA
−24 mA
V
IOUT = 50 µA
(Note 6)
VIN = VIL or VIH
4.5
0.50
5.5
0.50
IIN
Maximum Input Leakage Current
5.5
IOZ
Maximum TRI-STATE
5.5
± 1.0
± 5.0
V
IOL
µA
µA
Current
VI = VCC, GND
VI = VIL, VIH
VO = VCC, GND
ICCT
Maximum ICC/Input
5.5
1.6
mA
IOLD
5.5
50
mA
VI = VCC − 2.1V
VOLD = 1.65V Max
IOHD
(Note 7) Minimum
Dynamic Output
Current
5.5
−50
mA
VOHD = 3.85V Min
ICC
Maximum Quiescent
5.5
80.0
µA
VIN = VCC
Supply Current
or GND
Note 6: All outputs loaded; thresholds on input associated with output under test.
Note 7: Maximum test duration 2.0 ms, one output loaded at a time.
Note 8: ICC for 54ACT @ 25˚C is identical to 74ACT @ 25˚C.
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4
24 mA
24 mA
AC Electrical Characteristics
54AC
TA = −55˚C
VCC
Symbol
Parameter
(V)
to +125˚C
CL = 50 pF
(Note 9)
tPLH
tPHL
tPZH
tPZL
Min
Max
Propagation Delay
3.3
1.0
12.5
Data to Output
5.0
1.0
9.5
Propagation Delay
3.3
1.0
12.0
Data to Output
5.0
1.0
9.0
Output Enable Time
3.3
1.0
11.5
5.0
1.0
9.0
3.3
1.0
13.0
5.0
1.0
10.5
3.3
1.0
12.5
5.0
1.0
10.5
3.3
1.0
13.0
5.0
1.0
11.0
Output Enable Time
tPHZ
Output Disable Time
tPLZ
Units
Output Disable Time
ns
ns
ns
ns
ns
ns
Note 9: Voltage Range 3.3 is 3.3V ± 0.3V
Voltage Range 5.0 is 5.0V ± 0.5V
AC Electrical Characteristics
54ACT
TA = −55˚C
VCC
Symbol
Parameter
(V)
to +125˚C
CL = 50 pF
(Note 10)
tPLH
Propagation Delay
Units
Min
Max
5.0
1.0
10.0
ns
5.0
1.0
10.0
ns
Data to Output
tPHL
Propagation Delay
Data to Output
tPZH
Output Enable Time
5.0
1.0
9.5
ns
tPZL
Output Enable Time
5.0
1.0
11.0
ns
tPHZ
Output Disable Time
5.0
1.0
11.0
ns
tPLZ
Output Disable Time
5.0
1.0
11.5
ns
Note 10: Voltage Range 5.0 is 5.0V ± 0.5V
Capacitance
Symbol
CIN
CPD
Typ
Units
Input Capacitance
Parameter
4.5
pF
Power Dissipation
45.0
pF
Conditions
VCC = OPEN
VCC = 5.0V
Capacitance
5
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6
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
7
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54AC244 • 54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
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2. A critical component in any component of a life support
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the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness.
ure to perform when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
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