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RTC DC Characteristics |
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| Symbol | Parameter | Commercial | Industrial | Units | Notes | ||||
| Min | Max | Min | Max | ||||||
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| IBAK | RTC Backup Current | — | 300 | — | 350 | nA | From either VRTCcap or VRTCbat | ||
| VRTCbat | RTC Battery Pin Voltage | 1.8 | 3.3 | 1.8 | 3.3 | V | Typical = 3.0 Volts during normal | ||
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| VRTCcap | RTC Capacitor Pin Voltage | 1.2 | 2.7 | 1.2 | 2.7 | V | Typical = 2.4 Volts during normal | ||
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| tOSCS | RTC Oscillator time to start | — | 10 | — | 10 | sec | At MIN Temperature from Power up | ||
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| — | 5 | — | 5 | sec | At 25°C from Power up or Enable |
Figure 4. RTC Recommended Component Configuration
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C | Y |
RF | |
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2 |
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X1
X2
Recommended Values
Y1 = 32.768 KHz
RF = 10M Ohm
C1 = 0 (install cap footprint, but leave unloaded)
C2 = 56 pF ± 10% (do not vary from this value)
Document #: | Page 5 of 23 |
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