DS1236 Datasheet, PDF (11/19 Pages) Dallas Semiconductor – MicroManager Chip

DS1236
power-down in a sleep mode. Removal of the sleep mode by the PBRST input is not affected by the IN
pin threshold at V_TP when the RC pin is tied high (CMOS mode). Subsequent power-up of the V_CC supply
with the RC pin tied high will activate the RST and RST outputs as the main supply rises above V_BAT. A
high-to-low transition on the WC/ SC pin must follow a high-to-low transition on the ST pin by t_WC to
invoke a Sleep mode for the DS1236.
FRESHNESS SEAL Figure 8
NOTE: This series of pulses must be applied during normal +5 volt operation.
POWER SWITCHING Figure 9
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