dm9321 National Semiconductor Corporation, dm9321 Datasheet - Page 3
dm9321
Manufacturer Part Number
dm9321
Description
Dual 1-of-4 Decoder
Manufacturer
National Semiconductor Corporation
Datasheet
1.DM9321.pdf
(6 pages)
Switching Characteristics
Functional Description
The 9321 consists of two separate decoders each designed
to accept two binary weighted inputs and provide four mutu-
ally exclusive active LOW outputs as shown in the logic
symbol Each decoder can be used as a 4-output demulti-
plexer by using the enable as a data input
Logic Diagram
Symbol
t
t
t
t
PLH
PHL
PLH
PHL
Propagation Delay An to On
Propagation Delay E to On
Parameter
V
CC
e a
5 0V T
A
e a
3
Truth Table
H
L
X
25 C (See Section 1 for test waveforms and output load)
e
e
e
H
E
L
L
L
L
LOW Voltage Level
Immaterial
HIGH Voltage Level
Min
Inputs
A0
H
H
X
L
L
C
L
e
A1
H
H
L
L
X
15 pF
(Each Decoder)
O0
Max
H
H
H
H
L
20
21
14
18
O1
H
H
H
H
L
Outputs
O2
H
H
H
H
L
TL F 10209 – 3
Units
ns
ns
O3
H
H
H
H
L