9321 Datasheet, PDF (3/6 Pages) National Semiconductor (TI) – DUAL 1-OF-4 DECODER

Switching Characteristics V_CC e a5 0V T_A e a25 C (See Section 1 for test waveforms and output load)
Symbol
Parameter
C_L e 15 pF
Min
Max
Units
t_PLH
t_PHL
t_PLH
t_PHL
Propagation Delay An to On
Propagation Delay E to On
20
21
ns
14
ns
18
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
Truth Table (Each Decoder)
Inputs
Outputs
E
A0
A1
O0
O1
O2
O3
L
L
L
L
H
H
H
L
H
L
H
L
H
H
L
L
H
H
H
L
H
L
H
H
H
H
H
L
H
X
X
H
H
H
H
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
TL F 10209 – 3
3