Cypress AutoStore STK17T88 Dokumentacja Pobierz pdf (Strona 6)

STK17T88

Document Number: 001-52040 Rev. *C Page 6 of 24

RTC DC Characteristics

Figure 4. RTC Component Configuration

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 = 3.0V during normal operation

VRTCcap RTC Capacitor Pin Voltage 1.2 2.7 1.2 2.7 V Typical = 2.4V during normal operation

OSCS

RTC Oscillator Time to Start – 10 – 10 sec At minimum temperature from power up or enable

–5–5secAt 25°C from power up or enable

Recommended Values

= 32.768 kHz

= 10 MO

= 0 (install cap footprint, but leave unloaded)

= 56 pF ± 10% (do not vary from this value)

Not Recommended for New Designs

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Cypress AutoStore STK17T88 Dokumentacja Strona 6