DM9321N NSC [National Semiconductor], DM9321N Datasheet - Page 3

• Manufacturer Part Number: DM9321N
• Description: DUAL 1-OF-4 DECODER
• Manufacturer: NSC [National Semiconductor]

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