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
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| VDD |
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| CE |
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| WR |
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| DATA | 0.1 ∝ F |
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| CLK |
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| *1 | FOUT |
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*2 | FSEL |
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| FOE |
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| GND |
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*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
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| VDD |
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| CE |
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VDD |
| WR |
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| VDD |
| |
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| DATA | 0.1 ∝ F |
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| CLK |
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| ∗ 1 | FOUT |
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| FSEL |
| |
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| |
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| FOE |
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| GND |
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Page - 9 | MQ - 252 - 03 |