RTC - 4543 SA/SB

8. Examples of External Circuits

Example 1. When used as an RTC + clock source

VDD

Power supply

Switching circuit

VDD

Power supply

Detection circuit

RTC 4543

 

 

VDD

 

 

 

CE

 

 

 

WR

 

 

 

DATA

0.1 F

 

 

CLK

 

 

*1

FOUT

 

*2

FSEL

 

 

 

 

FOE

 

 

 

 

 

 

GND

 

*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)

VDD

RTC-4543

 

 

VDD

 

 

 

CE

 

VDD

 

WR

 

 

VDD

 

 

 

DATA

0.1 F

 

 

CLK

 

 

1

FOUT

 

 

FSEL

 

 

 

 

 

 

FOE

 

 

 

GND

 

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