Casio PCR-255 - 9 IC Data; Lb1268; S-80728 An-Z

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RA
RB
RC
OUT
-V
REF
V DD
V SS
1
-
+
1 2 3
9. IC DATA
9-1. LB1268
9-2. S-80728AN-Z
Bottom view
1 OUT
2 V
DD
3 V
SS
1
4
8
5
Equivalent circuit
IN1 IN2 IN3
123
4
6.8k 6.8k2k 2k 3.4k 1k
TR2
TR1 TR3 TR5
TR4 TR6
15k30k30k
GND
D3D2D1270 270 135
876
OUT1 OUT2 OUT3
5
V
CC