Advertisement
-----
(
(
(
(
DR- R504X
6. IC INFORMATION
• The
information
shown in the list is basic information
and
may not
correspond exactly
to that
shown
in the
schematic
diagrams.
• TC7S32F ( IC20: HEAD UNIT)
·CMOS DIGIT AL INTEGRATED CIRCUIT
• Block Diagram ( Top View )
IN B
IN A
GND
• TC74HC253AF ( IC702: HEAD UNIT)
•DUAL 4 - CHANNEL MULTIPLEXER
WITH
3 -
ST ATE OUTPUT
• Pin Arrangement (Top View )
8
>-
N
N
l('.)CD(Y)N
O
>-
O
u
u
u
u
z
('.)
• Truth Table
SELECT
DATA
INPUTS
INPUTS
B
A
co
Cl
C2
C3
x
x
x
x
x
x
L
L
L
x
x
x
L
L
H
x
x
x
L
H
x
L
x
x
L
H
x
H
x
x
H
L
x
x
L
x
H
L
x
x
H
x
H
H
x
x
x
L
H
H
x
x
x
H
X
:
Don"t
care
Z
:
High-
Impedance
STROBE
OUTPUT
y
G
H
z
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
H
• TC74HC4051AF ( IC608: MAIN UNIT)
•8 - CHANNEL ANALOG MULTIPLEXER/
DEMULTIPLEXER
• Pin Arrangement (Top View )
"""CD~t-LOIWO
8
z
~ ~
• Truth Table
CONTROL INPUTS
"ON"CHANNEL
INHIBIT
c
B
A
L
L
L
L
0
L
L
L
H
1
L
L
H
L
2
L
L
H
H
3
L
H
L
L
4
L
H
L
H
5
L
H
H
L
6
L
H
H
H
7
H
x
x
x
NONE
X
:
Don't care
• TC74HC4075AF ( IC706: HEAD UNIT)
•TRIPLE 3- INPUT OR GATE
• Block Diagram (Top View )
< ( C D < ( C D
U > - O
N
N
Z
('.)
• Truth Table
A
B
c
y
H
x
x
H
x
H
x
H
x
x
H
H
L
L
L
L
X
:
Don't
care
45
Advertisement
