54ACT244-N [TI]
Octal Buffer/Line Driver with TRI-STATE Outputs;
| 型号： | 54ACT244-N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | Octal Buffer/Line Driver with TRI-STATE Outputs |
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54AC244,54ACT244
54AC244/54ACT244 Octal Buffer/Line Driver with TRI-STATE Outputs
Literature Number: SNOS098B
OBSOLETE
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
address registers
Outputs source/sink 24 mA
■
■
■
'ACT244 has TTL-compatible inputs
Standard Microcircuit Drawing (SMD)
'AC244: 5962-87552
'ACT244: 5967760
—
—
54AC244 now lifieo 300Krad RHA designation, refer
to the SMD for formon
■
Pin Nas
OE1, 2
I0–
Description
TRI-STATE Output Enable Inputs
Its
Logic Symbol
IEEE/IEC
–O7
Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT™ is a trademark of Fairchild Semiconductor
© 2011 National Semiconductor Corporation
100282
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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
Connection Diagrams
Truth Table
Inputs
Outputs
Pin Assignment for DIP
and Flatpak
OE1 In
(Pins 12, 14, 16, 18)
L
L
L
H
X
L
H
Z
H
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs
Outputs
OE2
In
(Pins 3, 5, 7, 9)
L
L
L
H
X
L
H
Z
H
X = Immaterial
Z = High Impedan
10028202
Pin Assignment for LCC
1003
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2
100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Recommended Operating
Conditions
Supply Voltage (VCC
)
'AC
'ACT
2.0V to 6.0V
4.5V to 5.5V
0V to VCC
Supply Voltage (VCC
)
−0.5V to +7.0V
DC Input Diode Current (IIK)
VI = −0.5V
Input Voltage (VI)
Output Voltage (VO)
−20 mA
+20 mA
−0.5V to VCC + 0.5V
0V to VCC
VI = VCC + 0.5V
Operating Temperature (TA)
54AC/ACT
DC Input Voltage (VI)
DC Output Diode Current (IOK
VO = −0.5V
−55°C to +125°C
125 mV/ns
)
Minimum Input Edge Rate (ΔV/Δt)
'AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source
or Sink Current (IO)
DC VCC or Ground Current
Minimum Input ERate (ΔV/Δt)
'ACT Device
VIN from 0.8V V
VCC @ V, 5.5V
±50 mA
per Output Pin (ICC or IGND
)
±50 mA
125 mV/ns
Storage Temperature (TSTG
Junction Temperature (TJ)
CDIP
)
−65°C to +150°C
Note 1: Aaximum ratings are those values beyond which damage
to the dee ma. The databook specifications should be met, without
excepon, to ensure e system design is reliable over its power supply,
temature, and outputnput loading variables. National does not
rmmenperation of FACT™ circuits outside databook specifications.
175°C
DC Characteristics for 'AC Family Devices
54AC
VCC
(V)
TA =
Symbol
Parameter
Units
Conditions
55°C 125°C
anteed Limits
VIH
Minimum High
3.0
4.
5
4.5
5.5
2.1
3.15
3.85
0.9
VOUT = 0.1V
Level Input
Voltage
V
V
V
or VCC − 0.1V
VIL
Maximum Low
Level Input
Voltage
VOUT = 0.1V
1.35
1.65
2.9
or VCC − 0.1V
VOH
Minimum High
IOUT = −50 μA
Level Output
Voltage
.5
4.4
5.4
(Note 2)
VIN = VIL or VIH
3.0
4.5
5.5
3.0
2.4
3.7
4.7
0.1
−12 mA
−24 mA
−24 mA
V
V
IOH
VOL
Maximum Low
IOUT = 50 μA
Level Output
Voltage
4.5
5.5
0.1
0.1
(Note 2)
VIN = VIL or VIH
3.0
4.5
5.5
5.5
0.50
0.50
0.50
±1.0
12 mA
24 mA
24 mA
V
IOL
IIN
Maximum Input
Leakage Current
VI = VCC, GND
μA
3
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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
54AC
TA =
VCC
(V)
Symbol
Parameter
Units
Conditions
−55°C to +125°C
Guaranteed Limits
IOZ
Maximum
VI (OE) = VIL, VIH
VI = VCC, VGND
TRI-STATE
Current
5.5
±5.0
μA
VO = VCC, GND
VOLD = 1.65V Max
VOHD = 3.85V Min
IOLD
IOHD
(Note 3) Minimum
Dynamic Output
Current
5.5
5.5
50
mA
mA
−50
ICC
Maximum Quiescent
Supply Current
VIN = VCC
or GND
5.5
80.0
μA
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
54AC
VCC
(V)
=
Symbol
Parameter
Units
Conditions
−55to +5°C
GuaraLim
VIH
Minimum High Level
4.5
5.5
4.5
5.5
4.5
5.5
2.0
2.0
0
.8
4.4
5.4
VOUT = 0.1V
or VCC − 0.1V
VOUT = 0.1V
or VCC − 0.1V
V
V
V
Input Voltage
VIL
Maximum Low Level
Input Voltage
VOH
Minimum High Level
Output Voltage
IOUT = −50 μA
(Note 6)
VIN = VIL or VIH
5.5
4.5
5
3.70
4.70
0.1
IOH
−24 mA
−24 mA
V
V
VOL
Maximum Low Level
Output Voltage
IOUT = 50 μA
0.1
(Note 6)
VIN = VIL or VIH
4.5
5.5
5.5
0.50
0.50
±1.0
IOL
24 mA
24 mA
V
IIN
Maximum Input Leakagrrent
Maximum TRI-STATE
Current
VI = VCC, GND
VI = VIL, VIH
μA
μA
IOZ
5.5
±5.0
VO = VCC, GND
VI = VCC − 2.1V
VOLD = 1.65V Max
VOHD = 3.85V Min
ICCT
IOLD
IOHD
Maximum ICC/Input
5.5
5.5
5.5
1.6
50
mA
mA
mA
(Note 7) Minimum
Dynamic Output
Current
−50
ICC
Maximum Quiescent
Supply Current
VIN = VCC
or GND
5.5
80.0
μA
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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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
AC Electrical Characteristics
54AC
VCC
(V)
TA = −55°C
to +125°C
CL = 50 pF
Fig.
No.
Symbol
Parameter
Units
(Note 9)
Min
Max
12.5
9.5
tPLH
Propagation Delay
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.
1.0
1.0
0
1.
ns
ns
ns
ns
ns
ns
Data to Output
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay
Data to Output
12.0
9.0
Output Enable Time
11.5
9.0
Output Enable Time
Output Disable Time
Output Disable Time
13.0
10.5
15
0.5
13.0
11.0
Note 9: Voltage Range 3.3 is 3.3V ±0.3V
ꢀVoltage Range 5.0 is 5.0V ±0.5V
AC Electrical Characteristics
54ACT
VCC
)
TA = −55°C
to +125°C
CL = 50 pF
Fig.
No.
Symbol
Parameter
Units
0)
Min
Max
tPLH
Propagation Delay
5.0
5.0
1.0
10.0
ns
ns
Data to Output
tPHL
Propagation Delay
Data to Output
1.0
10.0
tPZH
tPZL
tPHZ
tPLZ
Output Enable Time
Output Enable Time
Output Disable T
Output Disab
5.0
5.0
5.0
5.0
1.0
1.0
1.0
1.0
9.5
ns
ns
ns
ns
11.0
11.0
11.5
Note 10: Voltage Range 5.0 is 5.0V
Capacitance
Symbol
Parameter
Typ
4.5
Units
pF
Conditions
CIN
Input Capacitance
Power Dissipation
Capacitance
VCC = OPEN
VCC = 5.0V
CPD
45.0
pF
5
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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
Physical Dimensions inches (millimeters) unless otherwise noted
20-Terminal ess Chip Carrier (L)
NS mber E20A
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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
20-Lead Ceramic Dual-In-Line ke (D)
NS Package Number J20
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
7
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100282 Version 3 Revision 1 Print Date/Time: 2011/07/29 21:07:23
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