Casio QT 6000 Service Manual - Page 98
Idt2305 Ic40, Functionalblockdiagram, Lm4876m Ic18, Typical Application, M51957bfp Ic33, Input, Power
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12. IDT2305 (IC40) REF 1 CLK2 2 CLK1 3 GND 4 FUNCTIONALBLOCKDIAGRAM 8 CLKOUT 7 CLK4 6 VDD 5 CLK 1 R EF P LL C ontrol L og ic 8 C LK O U T 3 CLK1 2 CLK2 5 CLK3 7 C LK4 13. LM4876M (IC18) 1 SHUTDOWN 2 BYPASS 3 + IN 4 - IN 8 Vol2 7 GND 6 VDD 5 Vol1 14. M51957BFP (IC33) NC 1 INPUT 2 NC 3 GND 4 8 NC 7 POWER 6 OUTPUT 5 DELAY VALUE INPUT Typical Application 6 4 - IN 3 +IN Amp1 100kΩ 10kΩ 10kΩ Vo1 5 - + - + 2 Bypass VDD/2 100kΩ 1 Shutdown Bias GND 7 Amp2 Vo2 8 Av= -1 POWER 5uA + 1.25V 25uA - OUTPUT GND DELAY VALUE - 96 -
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12.
IDT2305 (IC40)
PLL
8
CLK1
CLK2
CLK3
C LK
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
+
10k
Ω
10k
Ω
Vo1
Vo2
Av= –1
100k
Ω
100k
Ω
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