NSC DM9321 Dual 1-of-4 decoder Datasheet

9321/DM9321
Dual 1-of-4 Decoder
General Description
Features
The 9321 consists of two independent multipurpose decoders, each designed to accept two inputs and provide four
mutually exclusive outputs. In addition an active LOW enable input, which gives demultiplexing capability, is provided
for each decoder.
Y
Connection Diagram
Logic Symbol
Y
Y
Y
Multifunction capability
Mutually exclusive outputs
Demultiplexing capability
Active low enable for each decoder
Dual-In-Line Package
TL/F/10209 – 2
VCC e Pin 16
GND e Pin 8
TL/F/10209 – 1
Order Number 9321DMQB, 9321FMQB or DM9321N
See NS Package Number J16A, N16E or W16A
Pin Names
Ea, Eb
A0a, A1a, A0b, A1b
O0a– O3a
O0b– O3b
(
C1995 National Semiconductor Corporation
TL/F/10209
Description
Enable Inputs (Active LOW)
Address Inputs
Decoder Outputs (Active LOW)
RRD-B30M105/Printed in U. S. A.
9321/DM9321 Dual 1-of-4 Decoder
June 1989
Absolute Maximum Ratings
(Note)
Note: The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Supply Voltage
7V
Input Voltage
5.5V
Operating Free Air Temperature Range
b 55§ C to a 125§ C
MIL
COMM
0§ C to a 70§ C
Storage Temperature Range
b 65§ C to a 150§ C
Recommended Operating Conditions
Symbol
Military
Parameter
Commercial
Units
Min
Nom
Max
Min
Nom
Max
5
5.5
4.75
5
5.25
VCC
Supply Voltage
4.5
VIH
High Level Input
Voltage
2
VIL
Low Level Input
Voltage
IOH
2
V
V
0.8
0.8
V
High Level Output
Current
b 0.8
b 0.8
mA
IOL
Low Level Output
Current
16
16
mA
TA
Free Air Operating
Temperature
70
§C
b 55
125
0
Electrical Characteristics over recommended operating free air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
VI
Input Clamp Voltage
VCC e Min, II e b10 mA
VOH
High Level Output
Voltage
VCC e Min, IOH e Max,
VIL e Max, VIH e Min
VOL
Low Level Output
Voltage
VCC e Min, IOL e Max,
VIH e Min, VIL e Max
II
Input Current @ Max
Input Voltage
IIH
Min
Typ
(Note 1)
Max
Units
b 1.5
V
2.4
V
0.4
V
VCC e Max, VI e 5.5V
1
mA
High Level Input
Current
VCC e Max, VI e 2.4V
40
mA
IIL
Low Level Input
Current
VCC e Max, VI e 0.4V
b 1.6
mA
IOS
Short Circuit
Output Current
VCC e Max
(Note 2)
Supply Current
VCC e Max (Note 3)
ICC
MIL
b 20
b 70
COM
b 1.3
b 3.7
50
Note 1: All typicals are at VCC e 5V, TA e 25§ C.
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3: ICC is measured with all outputs open and all inputs grounded.
2
mA
mA
Switching Characteristics VCC e a 5.0V, TA e a 25§ C (See Section 1 for test waveforms and output load)
Symbol
CL e 15 pF
Parameter
Min
Units
Max
tPLH
tPHL
Propagation Delay, An to On
20
21
ns
tPLH
tPHL
Propagation Delay, E to On
14
18
ns
Functional Description
Truth Table (Each Decoder)
The 9321 consists of two separate decoders each designed
to accept two binary weighted inputs and provide four mutually exclusive active LOW outputs as shown in the logic
symbol. Each decoder can be used as a 4-output demultiplexer by using the enable as a data input.
Inputs
Outputs
E
A0
A1
O0
O1
O2
O3
L
L
L
L
H
L
H
L
H
X
L
L
H
H
X
L
H
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
H
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Logic Diagram
TL/F/10209 – 3
3
4
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 9321DMQB
NS Package Number J16A
16 Lead Molded Dual-In-Line Package (N)
Order Number DM9321N
NS Package Number N16E
5
9321/DM9321 Dual 1-of-4 Decoder
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 9321FMQB
NS Package Number W16A
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