Casio QT-6000 - In Case of Power Failure

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12. IDT2305 (IC40)
PLL
8
CLK1
CLK2
CLK3
CLK
4
Control
Logic
RE
F
CLKOUT
1
3
2
5
7
REF
CLK1
2
3
4
8
7
6
5
1
CLK2
GND
CLKOUT
CLK4
V
DD
CLK
FUNCTIONALBLOCKDIAGRAM
13. LM4876M (IC18)
SHUTDOWN
1
BYPASS
2
+ IN
3
– IN
4
Vol2
8
GND
7
V
DD
6
Vol1
5
+
10kΩ
10kΩ
Vo1
Vo2
Av= –1
100kΩ
100kΩ
GND
7
1
2
3
4
6
5
8
Amp2
Amp1
V
DD /2
+IN
– IN
Bypass
Shutdown
–
+
–
Bias
Typical Application
14. M51957BFP (IC33)
INPUT
OUTPUT
GND
1.25V
5uA 25uA
+
-
-
POWER
DELAY VALUE
NC
INPUT
NC
GND
POWER
OUTPUT
NC
DELAY VALUE
1
2
3
4
5
6
7
8