JM54AC139B2A [NSC]
Decoder/Driver;
| 型号： | JM54AC139B2A |
| 厂家： | 
National Semiconductor |
| 描述： | Decoder/Driver |
| 文件： | 总8页 (文件大小：172K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
August 1998
54AC139 • 54ACT139
Dual 1-of-4 Decoder/Demultiplexer
n Multifunction capability
n Two completely independent 1-of-4 decoders
General Description
The ’AC/’ACT139 is a high-speed, dual 1-of-4 decoder/
demultiplexer. The device has two independent decoders,
each accepting two inputs and providing four
mutually-exclusive active-LOW outputs. Each decoder has
an active-LOW Enable input which can be used as a data in-
n Active LOW mutually exclusive outputs
n Outputs source/sink 24 mA
n ’ACT139 has TTL-compatible inputs
n Standard Military Drawing (SMD)
— ’AC139: 5962-87623
put for
a 4-output demultiplexer. Each half of the ’AC/
— ’ACT139: 5962-87553
’ACT139 can be used as a function generator providing all
four minterms of two variables.
Features
n ICC reduced by 50%
Logic Symbols
IEEE/IEC
DS100269-8
DS100269-2
Pin Names
A0, A1
Description
Address Inputs
Enable Inputs
Outputs
E
O0–O3
DS100269-1
FACT® is a registered trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100269
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Connection Diagrams
can be used as the data input for a 4-output demultiplexer
application. Each half of the ’AC/’ACT139 generates all four
minterms of two variables. These four minterms are useful in
some applications, replacing multiple gate functions as
shown in , and thereby reducing the number of packages re-
quired in a logic network.
Pin Assignment
for DIP and Flatpak
DS100269-3
Pin Assignment
for LCC
DS100269-6
FIGURE 1. Gate Functions (Each Half)
Truth Table
Inputs
Outputs
E
H
L
L
L
L
A0
X
L
A1
X
L
O0
H
L
O1
O2
H
H
H
L
O3
H
H
H
H
L
DS100269-4
H
H
L
Functional Description
The ’AC/’ACT139 is
a high-speed dual 1-of-4 decoder/
H
L
L
H
H
H
demultiplexer. The device has two independent decoders,
each of which accepts two binary weighted inputs (A0–A1)
and provides four mutually exclusive active-LOW outputs
(O0–O3). Each decoder has an active-LOW enable (E).
When E is HIGH all outputs are forced HIGH. The enable
H
H
H
H
H
H
=
H
L
X
HIGH Voltage Level
LOW Voltage Level
Immaterial
=
=
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2
Logic Diagram
DS100269-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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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
2.0V to 6.0V
4.5V to 5.5V
0V to VCC
Supply Voltage (VCC
)
−0.5V to +7.0V
’ACT
DC Input Diode Current (IIK
)
Input Voltage (VI)
=
VI −0.5V
−20 mA
+20 mA
Output Voltage (VO
)
0V to VCC
=
VI VCC + 0.5V
Operating Temperature (TA)
54AC/ACT
DC Input Voltage (VI)
−0.5V to VCC + 0.5V
−55˚C to +125˚C
125 mV/ns
DC Output Diode Current (IOK
)
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
=
VO −0.5V
−20 mA
+20 mA
=
VO VCC + 0.5V
% to 70% of V
VIN from 30
CC
DC Output Voltage (VO
DC Output Source
)
−0.5V to VCC + 0.5V
@
VCC 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
’ACT Devices
±
±
or Sink Current (IO
)
50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND
VIN from 0.8V to 2.0V
)
50 mA
@
VCC 4.5V, 5.5V
125 mV/ns
Storage Temperature (TSTG
Junction Temperature (TJ)
CDIP
)
−65˚C to +150˚C
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 recom-
mend operation of FACT® circuits outside databook specifications.
175˚C
DC Characteristics for ’AC Family Devices
54AC
=
Symbol
Parameter
VCC
(V)
TA
Units
Conditions
−55˚C to
+125˚C
Guaranteed
Limits
2.1
=
VIH
Minimum High Level
Input Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
VOUT 0.1V
3.15
V
V
V
or VCC − 0.1V
3.85
=
VIL
Maximum Low Level
Input Voltage
0.9
VOUT 0.1V
1.35
or VCC − 0.1V
1.65
=
VOH
Minimum High Level
Output Voltage
2.9
IOUT −50 µA
4.4
5.4
(Note 2)
=
VIN VIL or VIH
=
IOH −12 mA
3.0
4.5
5.5
3.0
4.5
5.5
2.4
3.7
4.7
0.1
0.1
0.1
=
IOH −24 mA
V
V
=
IOH −24 mA
=
VOL
Maximum Low Level
Output Voltage
IOUT 50 µA
(Note 2)
=
VIN VIL or VIH
=
IOL 12 mA
3.0
4.5
5.5
5.5
0.50
0.50
0.50
=
IOL 24 mA
V
=
IOL 24 mA
=
±
IIN
Maximum Input
Leakage Current
1.0
µA
VI VCC, GND
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4
DC Characteristics for ’AC Family Devices (Continued)
54AC
=
Symbol
Parameter
VCC
(V)
TA
Units
Conditions
−55˚C to
+125˚C
Guaranteed
Limits
(Note 3)
Minimum Dynamic
Output Current
=
VOLD 1.65V Max
IOLD
IOHD
ICC
5.5
5.5
5.5
50
mA
mA
µA
=
VOHD 3.85V Min
−50
80.0
=
Maximum Quiescent
Supply Current
VIN VCC
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:
I
and I
CC
3.0V are guaranteed to be less than or equal to the respective limit 5.5V V .
IN
CC
@
@
I
for 54AC 25˚C is identical to 74AC 25˚C.
CC
DC Characteristics for ’ACT Family Devices
54ACT
=
Symbol
Parameter
VCC
(V)
TA
Units
Conditions
−55˚C to
+125˚C
Guaranteed
Limits
2.0
=
VIH
VIL
Minimum High Level
Input Voltage
4.5
5.5
4.5
5.5
4.5
5.5
V
V
V
VOUT 0.1V
2.0
or VCC − 0.1V
=
Maximum Low Level
Input Voltage
0.8
VOUT 0.1V
0.8
or VCC − 0.1V
=
VOH
Minimum High Level
Output Voltage
4.4
IOUT −50 µA
5.4
(Note 5)
=
VIN VIL or VIH
=
IOH −24 mA
4.5
5.5
4.5
5.5
3.70
4.70
0.1
V
V
=
IOH −24 mA
=
VOL
Maximum Low Level
Output Voltage
IOUT 50 µA
0.1
(Note 5)
=
VIN VIL or VIH
=
IOL 24 mA
4.5
5.5
5.5
0.50
0.50
V
=
IOL 24 mA
=
±
IIN
Maximum Input
Leakage Current
Maximum ICC/Input
(Note 6)
1.0
µA
mA
VI VCC, GND
=
VI VCC − 2.1V
ICCT
5.5
1.6
=
VOLD 1.65V Max
IOLD
IOHD
ICC
Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
5.5
5.5
50
mA
mA
µA
=
VOHD 3.85V Min
−50
80.0
=
VIN VCC
or GND
Note 5: All outputs loaded; thresholds on input associated with output under test.
Note 6: Maximum test duration 2.0 ms, one output loaded at a time.
@ @
I for 54ACT 25˚C is identical to 74ACT 25˚C.
CC
Note 7:
5
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AC Electrical Characteristics
54AC
=
VCC
(V)
TA −55˚C
Fig.
No.
Symbol
Parameter
to +125˚C
Units
=
(Note 8)
CL 50 pF
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Max
tPLH
tPHL
tPLH
tPHL
Propagation Delay
An to On
3.3
5.0
3.3
5.0
3.3
5.0
3.3
5.0
14.5
11.0
12.5
10.0
14.5
11.0
12.5
10.0
ns
ns
ns
ns
Propagation Delay
An to On
Propagation Delay
En to On
Propagation Delay
En to On
±
Note 8: Voltage Range 3.3 is 3.3V 0.3V
±
Voltage Range 5.0 is 5.0V 0.5V
AC Electrical Characteristics
54ACT
=
VCC
(V)
TA −55˚C
Fig.
No.
Symbol
Parameter
to +125˚C
Units
=
(Note 9)
CL 50 pF
Min
Max
tPLH
tPHL
tPLH
tPHL
Propagation Delay
An to On
5.0
5.0
5.0
5.0
1.0
12.0
11.0
12.5
12.0
ns
ns
ns
ns
Propagation Delay
An to On
1.0
1.0
1.0
Propagation Delay
En to On
Propagation Delay
En to On
±
Note 9: Voltage Range 5.0 is 5.0V 0.5V
Capacitance
Symbol
Parameter
Input Capacitance
Power Dissipation
Capacitance
Typ
Units
pF
Conditions
=
VCC OPEN
CIN
4.5
=
VCC 5.0V
CPD
40.0
pF
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6
Physical Dimensions inches (millimeters) unless otherwise noted
20 Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
16 Lead Ceramic Dual In-Line Package (D)
NS Package Number J16A
7
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16 Lead Ceramic Flatpak (F)
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE-
VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI-
CONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or sys-
tems which, (a) are intended for surgical implant into
the body, or (b) support or sustain life, and whose fail-
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.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Corporation
Americas
Tel: 1-800-272-9959
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National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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