TI 54ACT244

54AC244,54ACT244
54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
Literature Number: SNOS098B
July 29, 2011
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.
■ ICC and IOZ reduced by 50%
■ TRI-STATE outputs drive bus lines or buffer memory
■
■
■
■
Logic Symbol
address registers
Outputs source/sink 24 mA
'ACT244 has TTL-compatible inputs
Standard Microcircuit Drawing (SMD)
— 'AC244: 5962-87552
— 'ACT244: 5962-87760
54AC244 now qualified to 300Krad RHA designation, refer
to the SMD for more information
Pin Names
IEEE/IEC
Description
OE1, OE2
TRI-STATE Output Enable Inputs
I0–I7
Inputs
O0–O7
Outputs
10028201
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT™ is a trademark of Fairchild Semiconductor
© 2011 National Semiconductor Corporation
100282
100282 Version 3 Revision 1
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Print Date/Time: 2011/07/29 21:07:23
54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
OBSOLETE
54AC244 • 54ACT244
Connection Diagrams
Truth Table
Inputs
Pin Assignment for DIP
and Flatpak
Outputs
OE1
In
(Pins 12, 14, 16, 18)
L
L
H
L
H
X
L
H
Z
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs
In
(Pins 3, 5, 7, 9)
L
L
H
L
H
X
L
H
Z
X = Immaterial
Z = High Impedance
10028202
Pin Assignment for LCC
10028203
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2
100282 Version 3 Revision 1
Outputs
OE2
Print Date/Time: 2011/07/29 21:07:23
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
−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
Minimum Input Edge Rate (ΔV/Δt)
'AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
125 mV/ns
Minimum Input Edge Rate (ΔV/Δt)
'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.
175°C
DC Characteristics for 'AC Family Devices
54AC
Symbol
Parameter
VCC
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
Voltage
4.5
5.5
4.4
5.4
VOUT = 0.1V
V
or VCC − 0.1V
VOUT = 0.1V
V
or VCC − 0.1V
IOUT = −50 μA
V
(Note 2)
VIN = VIL or VIH
VOL
3.0
4.5
2.4
3.7
5.5
4.7
Maximum Low
3.0
0.1
Level Output
Voltage
4.5
5.5
0.1
0.1
V
−12 mA
−24 mA
IOH
−24 mA
IOUT = 50 μA
V
(Note 2)
VIN = VIL or VIH
3.0
4.5
IIN
Maximum Input
0.50
0.50
5.5
0.50
5.5
±1.0
V
12 mA
24 mA
IOL
24 mA
μA
VI = VCC, GND
Leakage Current
3
100282 Version 3 Revision 1
Print Date/Time: 2011/07/29 21:07:23
www.national.com
54AC244 • 54ACT244
Absolute Maximum Ratings (Note 1)
54AC244 • 54ACT244
54AC
Symbol
Parameter
VCC
TA =
(V)
−55°C to +125°C
Units
Conditions
Guaranteed Limits
IOZ
Maximum
VI (OE) = VIL, VIH
TRI-STATE
5.5
±5.0
μA
Current
IOLD
VI = VCC, VGND
VO = VCC, GND
(Note 3) Minimum
Dynamic Output
Current
5.5
50
mA
VOLD = 1.65V Max
IOHD
5.5
−50
mA
VOHD = 3.85V Min
ICC
Maximum Quiescent
5.5
80.0
μA
VIN = VCC
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
54ACT
Symbol
Parameter
VCC
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
or VCC − 0.1V
V
VOUT = 0.1V
or VCC − 0.1V
V
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
IOH
V
−24 mA
−24 mA
V
IOUT = 50 μA
(Note 6)
VIN = VIL or VIH
4.5
0.50
5.5
0.50
V
IOL
24 mA
IIN
Maximum Input Leakage Current
5.5
±1.0
μA
VI = VCC, GND
IOZ
Maximum TRI-STATE
5.5
±5.0
μA
VI = VIL, VIH
Current
VO = VCC, GND
ICCT
Maximum ICC/Input
5.5
1.6
mA
VI = VCC − 2.1V
IOLD
5.5
50
mA
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
100282 Version 3 Revision 1
24 mA
Print Date/Time: 2011/07/29 21:07:23
54AC
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
VCC
TA = −55°C
(V)
(Note 9)
to +125°C
CL = 50 pF
Fig.
Units
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
Output Disable Time
Output Disable Time
No.
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
Symbol
tPLH
Parameter
Propagation Delay
VCC
TA = −55°C
(V)
(Note 10)
to +125°C
CL = 50 pF
Fig.
Units
Min
Max
5.0
1.0
10.0
ns
5.0
1.0
10.0
ns
No.
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
Typ
Units
CIN
Symbol
Input Capacitance
Parameter
4.5
pF
VCC = OPEN
Conditions
CPD
Power Dissipation
45.0
pF
VCC = 5.0V
Capacitance
5
100282 Version 3 Revision 1
Print Date/Time: 2011/07/29 21:07:23
www.national.com
54AC244 • 54ACT244
AC Electrical Characteristics
54AC244 • 54ACT244
Physical Dimensions inches (millimeters) unless otherwise noted
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
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6
100282 Version 3 Revision 1
Print Date/Time: 2011/07/29 21:07:23
54AC244 • 54ACT244
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
7
100282 Version 3 Revision 1
Print Date/Time: 2011/07/29 21:07:23
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54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
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