SCI7660C0B/M0B
Recommended circuit in low voltage operation
*D1
RL
CL
8
7
6
5
1
2
3
4
+
–
1MΩ
C2=22µF
–
+
C1=10µF
*D1(VF(IF=1mA)≤0.6V)
■ CIRCUIT DESCRIPTION
■ C-R Oscillator
OSC1
OSC1
External Clock
The SCI7660C0B/M0B contains a C-R oscillator for
internal oscillation. It consists of an external resistor
ROSC connected between the OSC1 pin and OSC2 pin.
■ Voltage Converters
Rosc
OSC2
Open
OSC2
C-R Oscillation
External Clock Operation
The voltage converters double the input supply voltage (VI) using clocks generated by the C-R oscillator.
A doubled voltage can be obtained with a booster capacitor between CAP+ and CAP–, and with a external
smoothing capacitor between VI and VO.
10µF
5V
V
8
7
6
5
1
2
3
4
C2
C1
1MΩ
V
(+5V)
CC
V
V
V
DD=0V
GND
1
=–5V
=2V =–10V
1=–5V
(–5V)
0
1
10µF
Typical doubled voltage relations
V0
=–10V
(2V1)
3
EPSON [ EPSON COMPANY ]
