Yamaha DME24N Service Manual page 41

TC74VHC157F(EL) (XT475A00)
Quad 2 to 1 Multiplexer
DME24N DSP: IC200, 204, 300, 301,
IC304, 305
DME64N CA: IC400-403, 500, 501
DSP: IC200, 201, 204, 205,
IC300, 301, 304, 305
SELECT 1 16 Vcc
2
1A G 15
1A STROBE
3 1B 4A 14
1B 4A
4 1Y 4B
1Y 13 4B
5 2A 4Y
2A 12 4Y
6 2B 3A 11
2B 3A
7
2Y 2Y 3B 10 3B
8 9
GND 3Y
SN74AHCT245PWR (X2709A00)
74VHC245MTCX (X0296A00)
SN74ABT245BNSR (XU009A00)
TC74VHC245F (XT487A00)
SN74LV245APWR (X3693A00)
TC74VHC245FT (XU797A00)
Octal 3-State Bus Transceiver
DME24N DM: IC251-253, 258-262, 307,
IC311, 312, 316-318, 506
IC507, 601-606, 651-656,
IC702
DA: IC501, 502, 504-506
DSP: IC101-105, 108-116,
IC119-121, 124
JK: IC001-003
HP: IC301
DME64N DM: IC251-253, 258-262, 307,
IC311, 312, 316-318, 506,
IC507, 601-606, 651-656,
IC702
CA: IC101-106, 109, 111, 114,
IC204, 205, 301, 303, 600,
IC603, 604
JK: IC301-303
DSP: IC101-105, 108-116,
IC119-121, 124
HP: IC301
1
D1R
20 Vcc
2
19
A1
G
18
3
A2
B1
17
4
A3
B2
16
5
A4 B3
15
6
A5 B4
14
A6 7 B5
13
A7
8 B6
12
A8
9 B7
GND 11 B8
10
TC74VHC163FT (X2378A00)
SYNC. Decade Counter
DME24N DM: IC901
DME64N DM: IC901
CLEAR 1 16 Vcc
RIPPLE
R
2
CK 15 CARRY
CLOCK
C
OUTPUT
3 A 0A 14
A 0A
4 B 0B
B 13 0B
5 C 0C
C 12 0C
6 D 0D 11
D 0D
ENABLE ENABLE
EN EN
7
10
P T
P T
8 9
GND LOAD
HD74LV273ATELL (X2689A00)
Octal D-Type Flir Flop
DME24N DM: IC403-405, 502, 503, 802
DME64N DM: IC403-405, 502, 503, 802
CA: IC115
1 20
CLEAR
2 19
1Q
Q Q
CL CL
3 18
D CK CK D
1D
4 17
2D
D CK CK D
CL CL
5 16
Q Q
2Q
6 15
3Q
Q Q
CL CL
7 14
D CK CK D
3D
8 13
4D
D CK CK D
CL CL
9 12
Q Q
4Q
10 11
GND
SN74LV244PWR (X3292A00)
Octal 3-State Bus Buffer
DME24N DM: IC411, 414, 415
AD: IC902
JK: IC008
DME64N DM: IC411, 414, 415
CA: IC110, 801
1G
1
2
1A1
3
2Y4
1A2
4
5
2Y3
1A3
6
2Y2 7
8
1A4
9
2Y1
(GND) Vss
10
74VHC541SJX (XY961A00)
Octal 3-State Buffer
DME24N DM: IC256, 607, 608, 657, 658
DME64N DM: IC256, 607, 608, 657, 658
CA: IC113, 116-118, 601, 602, 605
G1
1
VCC
A1 2
8Q
A2
3
8D
A3
4
7D
A4
5
7Q
A5
6
6Q
A6
7
6D
A7
5D
8
5Q A8
9
CLOCK
GND
10
SN74LV574APWR (X5135A00)
Octal D-Type Flip-Flop
DME24N AD: IC903-908
Output
1
Control
2
D0
3
D1
4
D2
5
D3
6
D4
7
D5
8
D6
9
D7
GND 10
DME24N/DME64N
VDD (Vcc)
20
2G
19
1Y1
18
2A4
17
1Y2
16
2A3
15
1Y3
14
2A2
13
1Y4
12
2A1
11
20 Vcc
G2
19
Y1
18
Y2
17
Y3
16
Y4
15
Y5
14
Y6
13
Y7
12
Y8
11
20
Vcc
D Q 19
Q0
CK OE
D Q 18
Q1
CK OE
D Q
17
Q2
CK OE
D Q
16
Q3
CK OE
D Q
15
Q4
CK OE
D Q 14
Q5
CK
OE
D Q 13
Q6
CK
OE
D Q
12
Q7
CK OE
Clock
11
41