Yamaha TYROS 2 Service Manual page 41

HD74LV273AFPEL-E (IS027300)
Octal 3-State D-Type Flip Flop
DM: IC37
CLR Vcc
1 20
1Q 8Q
2 19
Q Q
CL CL
1D 8D
D CK CK D
3
18
2D 7D
4
17
CK
D CK D
CL
CL
2Q 7Q
Q Q
5 16
3Q 6Q
6 15
Q Q
CL CL
3D D CK 6D
CK D
7 14
4D 5D
8 13
CK D
D CK
CL
CL
4Q Q Q 5Q
9
12
GND CLK
10 11
TC74VHC245FT (XU797A00)
TC74VHCT245AFT (XT744B00)
Octal 3-State Bus Transceiver
DM: IC54
DM: IC27
D1R 1 20 V
CC
A1 2 G
19
A2 3 18 B1
A3 4 B2
17
A4 5 16 B3
A5 6 15 B4
A6 7 14 B5
A7 8 13 B6
A8 9 B7
12
GND 10 11 B8
DS90LV011ATMF/NOPB (X6788A00)
LVDS Driver
DM: IC42
V TTL IN
1 4
DD
GND
2
D
OUT-
3 5 OUT+
TC74ACT74FT(EL) (X6536A00)
Dual D-Type Flip-Flop
DM: IC303
1
1CLR 14 VCC
2 13
1D D
2CLR
D
3 12
1CK CK 2D
4
1PR PR 11
CK 2CK
5 Q
1Q 10
2PR
PR
6
9
Q
1Q Q 2Q
7
GND 8
2Q
Q
INPUTS OUTPUTS
CLR PR D CK Q
L H X X L
H L X X H
L L X H
X
H H L L
H H H H
H H X Q
n
HD74LVC245A (XW148A00)
TRANSCEIVER
DM: IC19,IC20,IC21,IC22,IC28,IC29,
IC46,IC421,IC422,IC423,IC424
D1R 1
20
A1 2 19
A2 3 18
A3 4 17
A4 5 16
A5 6
15
A6 7 14
A7 8 13
A8 9 12
GND 10 11
DS90LV012ATMF/NOPB (X6789A00)
LVDS Receiver
LCL: IC2
V TTL OUT
1 4
DD
GND R
2
IN -
IN+ 3 5
TC74ACT244FT(EL) (X6537A00)
Octal 3-State Bus Buffer
DM: IC305
1G
1
2
1A1
3
2Y4
1A2
4
5
2Y3
1A3
6
2Y2 7
8
1A4
9
2Y1
Q
GND
10
H
L
H
H
L
Q
n
HD74LV126ATELL (X3123A00)
Quad 3-State Bus Buffer
DM: IC9
V
CC
G
1OE 1
B1
A1
B2
Y1
B3
2OE 4
B4
A2
B5
Y2 6
B6
GND
B7
B8
NJM4580E(TE2) (X2331A00)
NJM2100V(TE2) (X2538A00)
UPC4570G2-T1-A (XF291A00)
Dual Operational Amplifier
AJK: IC2,IC4,IC5,IC7,IC8
EMKS-FD: IC002
DAC2A: IC202,IC302,IC402,IC403,IC404
Output A
Inverting
Input A
Non-Inverting
Input A
-DC Voltage Supply
Tyros2
Vcc
20
2G
19
1Y1
18
2A4
17
1Y2
16
2A3
15
1Y3
14
2A2
13
1Y4
12
2A1
11
14 Vcc
2
13 4OE
3
12 A4
11 Y4
5 10 3OE
9 A3
7 8 Y3
+DC Voltage
1 +V 8
Supply
2 7 Output B
- +
Inverting
3 6
+ -
Input B
Non-Inverting
4 -V 5
Input B
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