DS17285 Datasheet, PDF (26/38 Pages) Dallas Semiconductor – 3V/5V Real-Time Clock

DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL MIN
Average V_CC Power-Supply
Current
I_CC1
CMOS Standby Current
( CS = V_CC - 0.2V)
Input Leakage Current
(Any Input)
I_CC2
I_IL
-1
Output Leakage Current
Output Logic 1 Voltage
at -0.6mA
I_OL
-1
V_OH
2.4
Output Logic 0 Voltage
at +1.2mA
V_OL
Power-Fail Trip Point
V_PF
2.5
Battery Leakage OSC ON
I_BAT1
Battery Leakage OSC OFF
I_BAT2
I/O Leakage
I_LO
-1
PWR Output at 0.4V
I_OLPWR
IRQ Output at 0.4V
I_OLIRQ
DS17285/DS17287
Over the operating range (3V)
TYP MAX UNITS NOTES
15
30
mA
1, 2
0.5
2
mA
1, 2
+1
mA
+1
mA
5
V
0.4
V
2.6
2.7
V
3
0.50
0.7
mA
11
0.050
0.4
mA
11
+1
mA
4
4
mA
0.8
mA
CRYSTAL SPECIFICATIONS*
PARAMETER
SYMBOL MIN
TYP MAX UNITS NOTES
Nominal Frequency
F_O
Series Resistance
ESR
32.768
kHz
45
kΩ
Load Capacitance
C_L
6 or 12.5
pF
*The crystal, traces, and crystal input pins should be isolated from RF generating signals. Refer to Application
Note 58, “Crystal Considerations for Dallas Real-Time Clocks” for additional specification.
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