Adcom GTP-740 - Page 36

36
GTP-740
1A
1
1Y
2
2A
3
2Y
4
3A
5
3Y
6
4A
9
4Y
8
5A
11
5Y
10
6A
13
6Y
12
11A
21Y
32A
42Y
53A
63Y
7GND
14 V
CC
13 6A
12 6Y
11 5A
10 5Y
94A
84Y
DTS ASSEMBLY
U5: 74HC14
OUT
IN
GND
POWER ASSEMBLY
U801: LM78L24
U802, U804, U806, U807: 78XX
OUT
IN
GND
POWER ASSEMBLY
U803: LM7915CT
U805: 7905
DECODERA0-A14
VCC
GND
I/O0-I/O7
CE1
OE
WE
256X1024
MEMORY ARRAY
I/O
DATA
CIRCUIT
CONTROL
CIRCUIT
COLUMN I/O
1A14 28 VCC
2A12 27 WE
3A7 26 A13
4A6 25 A8
5A5 24 A9
6A4 23 A11
7A3 22 OE
8A2 21 A10
9A1 20 CE
10A0 19 I/O7
11I/O0 18 I/O6
12I/O1 17 I/O5
13I/O2 16 I/O4
14GND 15 I/O3
22OE 21 A10
23A11 20 CE
24A9 19 I/O7
25A8 18 I/O6
26A13 17 I/O5
27WE 16 I/O4
28VCC 15 I/O3
1A14 14 GND
2A12 13 I/O2
3A7 12 I/O1
4A6 11 I/O0
5A5 10 I/A0
6A4 9 I/A1
7A3 8 I/A2
or
DTS ASSEMBLY
U3: KM68257C-15
1by 16 V
CC
2bx 15
OUT/IN
bx or by
3cy 14
OUT/IN
ax or ay
4
OUT/IN
cx or cy
13 ay
5IN/OUT cx 12 by
6INH 11 A
7V
EE
10 B
8GND 9C
IN/OUT
IN/OUT
TG
V
DD
(16)
LOGIC LEVEL
CONVERSION
BINARY TO
1 OF 2
DECODER
WITH
INHIBIT
IN/OUT
V
EE
(7)V
EE
(8)
INH
(6)
C
(9)
B
(10)
A
(11)
cy
(3)
cx
(5)
by
(1)
bx
(2)
ay
(13)
ax
(12)
OUT/IN
ax or ay
(14)
OUT/IN
bx orby
(15)
OUT/IN
cx orcy
(4)
TG
TG
TG
TG
TG
DTS ASSEMBLY
U6: 74HC4053M
IC BLOCK DIAGRAM