Epson S1F70000 User Manual

S1F70000 Series

                                                                 5–21

Technical Manual

When the S1F77200Y circuit is configured as shown in Figure 5-16, it can be used as a CR timer circuit.

Figure 5-16   CR timer circuit

The following is an example of the supply voltage switching circuit for the battery backup configured featuring the
S1F77200Y series.

Figure 5-17   Battery backup circuit

V

DD

V

CC

V

BAT

V

DD

V

O

V

SS

PNP transistor

NPN transistor

Enable signal

S1F77200Y

V

DD

V

DD

V

DD

V

O

V

SS

OUT

R

C

S1F77200Y