STK17T88
RTC DC CHARACTERISTICS
Symbol
Parameter
RTC Backup
Current
RTC Battery Pin
Voltage
RTC Capacitor
Pin Voltage
RTC Oscillator
time to start
Commercial
Min
Max
—
1.8
1.2
—
—
300
3.3
2.7
10
5
Industrial
Min
Max
—
1.8
1.2
—
—
350
3.3
2.7
10
5
Units
nA
V
V
sec
sec
Notes
From either V
RTCcap
or
V
RTC
bat
Typical = 3.0 Volts during
normal operation
Typical = 2.4 Volts during
normal operation
@ MIN Temperature from
Power up or Enable
@ 25
°
C from Power up or
Enable
I
BAK
V
RTCbat
V
RTCcap
t
OSCS
RTC RECOMMENDED COMPONENT CONFIGURATION
C
1
RF
C
2
Y
1
X
1
X
2
Recommended Values
Y
1
= 32.768 KHz
RF = 10M Ohm
C
1
= 0 (install cap footprint,
but leave unloaded)
C
2
= 56 pF ± 10% (do not vary from this value)
Figure 3. RTC COMPONENT CONFIGURATION
Document Control #ML0024 Rev 2.0
Jan, 2008
5
SIMTEK [ SIMTEK CORPORATION ]
