Casio EX-468 - Page 77

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18. SN751178NSR (IC14)17. SN74LVU04APWR (IC22)
19. XC62EP1902MR (IC5)
1A
1Y
2A
2Y
1
2
3
4
5
7
6
3A
GND
3Y
VCC
6A
6Y
5A
5Y
4Y
4A
14
13
12
11
10
8
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1B
1A
1R
1DE
2R
2A
2B
GND
V
CC
1D
1Y
1Z
2DE
2Z
2Y
2D
INPUT
ENABLE
OUTPUTS
DDE
YZ
HHHL
LHLH
XLZZ
H = high level,
L = low level,
X = irrelevant,
Z = high impedance (off)
DIFFERENTIAL INPUTS
A ± B
OUTPUT
R
V
ID
. 0.2 V H
±0.2 V < V
ID
< 0.2 V ?
V
ID
3 ±0.2 V L
H = high level,
L = low level,
? = indeterminate
Current
Limit
Voltage
Reference
V DD
EXT
CE
V
OUT
V SS
V IN V SS
CE/CE
3 2
1
5
NC OUT
EXT
4
20. XC6365A363MR (IC4)
V DD EXT/
V
OUT
(FB)
3 2
1
5
GND
CE
4
Vref whth
Soft Start,
CE
Ramp Wave
Generatpr,
OSC
Phase
Compensation
PWM/PFM
Controler
PWM
Controler
Error Amp
Buffer,
Drive
V DD
V OUT
EXT
/
GND
CE