S-77100 Datasheet, PDF (22/40 Pages) Seiko Instruments Inc – POWER SEQUENCER

POWER SEQUENCER
S-77100/77101 Series
Rev.1.0_01
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3. 2. 3 Operation when connecting VDD pin, ON pin and OFF pin
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The on-sequence operation is performed automatically when connecting the VDD pin, the ON pin and the OFF
pin and the power supply is raised. However, since the ENBL_x pins all change to "L" if VDD is equal to or lower
than VUVLO when the power supply is fallen, the off-sequence operation timing is not guaranteed. The operation
example is shown in Figure 25.
VDD, ON, OFF
CDLY
ENBL_A
ENBL_B
ENBL_C
Figure 25
VUVLO
VSS
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