Cypress AutoStore STK17TA8 Manual do Utilizador descarregar pdf (Página 5)

STK17TA8

Document #: 001-52039 Rev. ** Page 5 of 23

RTC DC Characteristics

Figure 4. RTC Recommended Component Configuration

Symbol Parameter

Commercial Industrial

Units Notes

Min Max Min Max

BAK

RTC Backup Current — 300 — 350 nA From either V

RTCcap

or V

RTCbat

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 At MIN Temperature from Power up

or Enable

—5—5 secAt 25°C from Power up or Enable

Recommended Values

= 32.768 KHz

= 10M Ohm

= 0 (install cap footprint,

but leave unloaded)

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

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Cypress AutoStore STK17TA8 Manual do Utilizador Página 5