Sony BVP-550 Maintenance Manual page 820

IC
SN74HCT244APW-E05(TI)FLAT PACKAGE
TC74VHC244FS(EL)(TOSHIBA)FLAT PACKAGE(SMALL)
C-MOS BUS BUFFER WITH 3-STATE OUTPUTS
—TOP VIEW—
G2
20 19 18 17 16 15 14
V
DD
1 2 3 4 5 6 7
G1
2
4
6
8
2 18
4 16
6 14
8 12
11 9
OR
13 7
15 5
17 3
11
G1
G2
13
15
1 19
17
SN75158PS(TI)
DUAL DIFFERENTIAL LINE DRIVE
— TOP VIEW —
V
CC
1Z 1 8
(+5 V)
1Y 2 7 2Z
1A 3 6 2Y
4 GND 5 2A
6-20
13 12 11
A Y = A
G G
G A Y
0 0 0
0 1 1
GND
X X HI-Z
8 9 10
0 ; LOW LEVEL
1 ; HIGH LEVEL
X ; DON'T CARE
HI-Z ; HIGH IMPEDANCE
18
16
14
NOTE:
12
TYPE V
DD
G
AC
+2 to +6V
HC
1
40H
ACT
BCT
+5V
FCT
HCT
9
TC74AC244 TYPE
7 +2 to +5.5V
TC74VHC244
5
3
G
19
STK10C68-5S35(SIMTEK)FLAT PACKAGE
C-MOS 8K×8-BIT NONVOLATILE STATIC RAM
— TOP VIEW —
NE 1
IN
(+5V)
Y
A12 2
IN
A7 3
IN
A6 4
IN
A5 5
IN
A4 6
IN
A3 7
IN
A2 8
IN
A1 9
IN
A0 10
IN
D0 11
IN/OUT
D1 12
IN/OUT
D2 13
IN/OUT
14 GND
7
A3
6
A4
5
A5
4
ROW
A6
3
DECODER
A7
25
A8
24
A9
2
A12
10
A0
9
A1
COLUMN
8
A2
DECODER
21
A10
23
A11
22
OE
27
WE
1
NE
20
CE
STORE/RECALL
CONTROL
TA75S393F(TOSHIBA)
SINGLE COMPARATOR
— TOP VIEW —
OUT
5 4
V
CC
–
V ; +1 V to +18 V or +2 V to +36 V
CC
+
V ; –1 V to –18 V
EE
V
EE
1 2 3
IN (–) IN (+)
10
A0
V
DD
28 9
A1
8
A2
27 WE
IN 7
A3
6
A4
NC 26
5
A5
4
A6
25 A8 3
IN
A7
25
A8
24 A9 24
IN
A9
21
A10
23 A11
IN 23
A11
2
A12
22 OE
IN
NE CE OE
21 A10
IN
1 20
20 CE
IN
A0 - A12 ; ADDRESS INPUTS
19 D7
IN/OUT
CE ; CHIP ENABLE INPUT
D0 - D7 ; DATA INPUTS/OUTPUTS
18 D6
IN
NE ; NONVOLATILE ENABLE INPUT
OE ; OUTPUT ENABLE INPUT
17 D5
IN
WE ; WRITE ENABLE INPUT
16 D4
IN
15 D3
IN
STORE
EEPROM ARRAY
RECALL
256×256
STATIC RAM
ARRAY
256×256
COLUMN
11
I/O
12
13
15
8 8
8
16
17
18
8 8
INPUT
19
BUFFER
11
D0
12
D1
13
D2
15
D3
16
D4
17
D5
18
D6
19
D7
WE
22 27
D0
D1
D2
D3
D4
D5
D6
D7
BVP-550