Ic Data; Lb1268; S-80728An-Z - Casio PCR-255 Service Manual

9. IC DATA

9-1. LB1268

1
4

9-2. S-80728AN-Z

1 2 3
OUT1
8
8
270
TR1
5
30k
TR2
6.8k 2k
1
IN1
1 OUT
2 V
DD
3 V
SS
Bottom view
— 13 —
Equivalent circuit
OUT2
7
D1 270 D2
TR3
30k
TR4
6.8k 2k 3.4k
2 3
IN2 IN3
V
-
RA
+
RB
-V
1
REF
RC
V
SS
OUT3
6
5
V CC
135 D3
TR5
15k
TR6
1k
4
GND
DD
OUT