Epson RTC-4543SB - Manual (Page 12)

RTC - 4543 SA/SB
Page - 9 MQ - 252 - 03
8. Examples of External Circuits
•
Example 1. When used as an RTC + clock source
RTC 4543
VDD
CE
GND
0.1
µ
F
FOUT
FSEL
WR
DATA
CLK
FOE
VDD
VDD
Power supply
Detection circuit
Power supply
Switching circuit
*1
*2
*1: FOUT output frequency setting (High: 1 Hz; low: 32.768 kHz)
*2: Prohibits FOUT output during back up, reducing current consumption.
•
Example 2. When used as a clock source (oscillator)
RTC-4543
V DD
CE
GND
0.1
µ
F
FOUT
FSEL
WR
DATA
CLK
FOE
V DD
V DD
V DD
∗
1