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STK17TA8 Datasheet(PDF) 5 Page - Simtek Corporation |
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STK17TA8 Datasheet(HTML) 5 Page - Simtek Corporation |
5 / 29 page 5 STK17TA8 Jan, 2008 Document Control #ML0025 Rev 2.0 RTC DC CHARACTERISTICS Symbol Parameter Commercial Industrial Units Notes Min Max Min Max 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 operation VRTCcap RTC Capacitor Pin Voltage 1.2 2.7 1.2 2.7 V Typical = 2.4 Volts during normal operation tOSCS RTC Oscillator time to start — 10 — 10 sec @ MIN Temperature from Power up or Enable — 5 — 5 sec @ 25 °C from Power up or Enable RTC RECOMMENDED COMPONENT CONFIGURATION Figure 3. RTC Component Configuration X1 X2 Recommended Values Y1 = 32.768 KHz = 10M Ohm = 0 (install cap footprint, but leave unloaded) = 56 pF ± 10% (do not vary from this value) RF C1 C2 |
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