Cypress AutoStore STK17T88 Especificaciones Pagina 6

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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
t
OSCS
RTC Oscillator Time to Start 10 10 sec At minimum temperature from power up or enable
–55secAt 25°C from power up or enable
C
1
C
2
RF
Y
1
X
1
X
2
Recommended Values
Y
1
= 32.768 kHz
= 10 MO
= 0 (install cap footprint, but leave unloaded)
= 56 pF ± 10% (do not vary from this value)
RF
C
1
C
2
Not Recommended for New Designs
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