Bose FreeSpace 4400 Service Manual page 96

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