Denon S-301 Service Manual page 75

SN74LV244APW (IC708, 719: 1U-3694)
SN74HCT244APW (IC205: 1U-3694)
1
OE
2
I0
3
O4
4
I1
5
O5
6
I2
7
O6
8
I3
9
O7
10
GND
SN74LV157APW (IC303: 1U-3692)
(IC704, 715, 720, 721: 1U-3694)
SE LECT
1
SEL
1A
2
3
1B
1Y 4
5 5
2A
2B 6
7
2Y
8
GND
LMS202 (IC101: 1U-3694)
Pin Number Pin Name
1, 3 C1+, C1
2 V+
4, 5 C2+, C2
6 V
7, 14 T1out, T2out
8,13 R1in, R2in
9, 12 R1out and R2out Receiver output pins are TTL/CMOS compatible
10, 11 Tin1, Tin2
15 GND
16 V
S
20
VCC
19
OE2
18
O0
17
I4
16
O1
15
I5
14
O2
13
I6
12
O3
11
I7
16
Vcc
15
ST
14
4A
13
4B
12
4Y
11 3A
10
3B
9 3Y
Pin Function
External capacitor connection pins.
Positive supply for TIA/EIA-232E drivers.
External capacitor connection pins.
Negative supply for TIA/EIA-232E drivers.
Transmitter output pins conform to TIA/EIA-232E levels. The typical transmitter output swing is
±
8V when loaded 3k
to V
Receiver inputs accept TIA/EIA-232
Transmitter input pins are TTL/CMOS compatible. Inputs of transmitter do not have pull-up
resistors. Connect all unused transmitter inputs to ground
Ground pin
Power supply pin for the device, +5V (
BU2090F (IC303: 1U-3681)
(IC504: 1U-3695)
VSS 1
DATA 2
CLOCK 3
LCK
4
Q0
5
Q1 6
Q2 7
Q3 8
Q4 9
SN74LVC139APWR (IC902: 1U-3694))
1 16 V
1G
C C
2 15 2G
1A
3 14 2A
1B
1Y 0 4 13 2B
1Y 1 5 12 2Y 0
1Y 2 6 11 2Y 1
1Y 3 7 10 2Y 2
8 9 2Y 3
G ND
load to ground. The open-circuit output voltage swings from (V+
±
10%)
75
18
CONTROL CIRCUIT VDD
17 OE
12-bit SHIFT REGISTER
16 Q11
Q10
15
12-bt STRAGEREGISTER
Q9
14
O U T P U TB U FFE R(O P E ND R AN )
13 Q8
12
Q7
Q6
11
Q5
10
F UNC T ION TAB LE
(each decoder/demultiplexer)
INP UT S
OUT P UT S OUT P UT S
S E LE C T
G G
B A Y 3 Y 2
L L L H H
L L H H H
L H L H L
L H H L H
H X X H H
S-301
Y 1 Y 0
H L
L H
H H
H H
H H
0.6V)