Ic Signal Name - Sharp FO-475TH Service Manual

[2] IC signal name

CONTROL PWB UNIT
IC13: VHiULN2003AN/ (ULN2003A)
1C 2C 3C 4C 5C 6C 7C COM
16 15 14 13 12 11 10
1 2 3
1B 2B 3B 4B 5B 6B 7B
IC3: VHiMC74HCU04F(MC74HCU04F)
VCC 6A 6Y
14 13 12
1 2 3
1A 1Y 2A
9
4 5 6 7 8
E
5A 5Y 4A 4Y
11 10 9
4 5 6
2Y 3A 3Y GND
IC7: VHiW24257S7LL (W24257S-70LLT)
A14 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 10
DQ1 11
DQ2 12
DQ3 13
GND 14
IC6, 10: VHiHCF4053M1T (HCF4053B)
8
Controls
7
Switches
In/Out
8 – 4
(TOP VIEW)
28 VCC
27 W
26 A13
25 A8
24 A9
23 A11
22 S2
Pin name
21 A10
20 S1
CE1/CE2
19 DQ8
18 DQ7
I/O1~I/O8
17 DQ6
16 DQ5
15 DQ4
6 Inhibit
11 A
X
10 B
9 C
12 X0
Y
13 X1
2 Y0
1 Y1
5 Z0
Z
3 Z1
VDD: Pin 16
VSS: Pin 8
VEE: Pin7
UX-258TH
FO-475TH
Signal
Address input
A0~A12
Chip enable
WE Write enable
OE Write enable
Data I/O
VCC Power source
GND Ground
N.C. No connection
14
15
Common
Out/In
4