Bose FREESPACE 4400, Service Manual, Page: 96 / 107

96
Integrated Circuit Diagrams
AT27LV010A, EPROM
Pin Configurations
Pin Name Function
A0 - A16 Addresses
O0 - O7 Outputs
CE Chip Enable
OE Output Enable
PGM Program Strobe
NC No Connect
PLCC Top View
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
A7
A6
A5
A4
A3
A2
A1
A0
O0
A14
A13
A8
A9
A11
OE
A10
CE
O7
4 3 2 1
32 31 30
14 15 16 17 18 19 20
O1 O2
GND
O3 O4 O5 O6
A12 A15 A16 VPP VCC PGM NC
Block Diagram
CD74HC4051, Analog MUX - DEMUX
Pinout Diagram
TOP VIEW
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
A4
A6
A
A7
A5
E
GND
V
EE
V
CC
A1
A0
A3
S0
S1
S2
A2
CHANNEL
IN/OUT
CHANNEL
IN/OUT
CHANNEL
IN/OUT
COM OUT/IN
ADDRESS
SELECT
Block Diagram
TG
TG
TG
TG
TG
TG
TG
3
A
COMMON
OUT/IN
BINARY
TO
1 OF 8
DECODER
WITH
ENABLE
11
10
9
6 E
S
2
S
1
S
0
LOGIC
LEVEL
CONVERSION
8 7
GND V
EE
16
V
CC
13 14 15 12 1 5 2 4
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
CHANNEL IN/OUT
TG
TRUTH TABLE
HC/HCT4051
INPUT STATES
“ON”
CHANNELS ENABLE S
2
S
1
S
0
L L L L A0
L L L H A1
L L H L A2
L L H H A3
L H L L A4
L H L H A5
L H H L A6
L H H H A7
H X X X None
X = Don’t care
INA129UA, Instrumentation Amplifier
A
1
A
2
A
3
40k
Ω
40k
Ω
40k
Ω
40k
Ω
V
IN
2
1
8
3
6
5
V
IN
R
G
V+
V
−
Ref
V
O
G = 1 +
49.4k
Ω
R
G
−
+
4
7
NOTE: (1) INA129: 24.7k
Ω
INA129
Over-Voltage
Protection
Over-Voltage
Protection
25k
Ω (1)
25k
Ω
(1)
INA129:
R
G
V −
IN
V
+
IN
V
−
R
G
V+
V
O
Ref
1
2
3
4
8
7
6
5
Top View
BLOCK DIAGRAM
PINOUT DIAGRAM