S-77100 Datasheet, PDF (23/40 Pages) Seiko Instruments Inc – POWER SEQUENCER

Rev.1.0_01
POWER SEQUENCER
S-77100/77101 Series
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 Input of ON Pin and OFF Pin
1. Input level (Selectable as the option)
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The input level of the ON pin in the S-77100 Series, the ON pin and the OFF pin in the S-77101 Series can be
selected from the following 2 options.
1. 1 Schmitt trigger input
Schmitt trigger input has the power supply voltage dependency in the input voltage level. Refer to " Electrical
Characteristics" for the input voltage.
1. 2 Comparator input
The input threshold voltage of the comparator input has almost no power supply voltage dependency. For this
reason, the sequence operation control by I/O interface of the low voltage microcomputer is also available.
Refer to " Electrical Characteristics" for the input threshold voltage of the comparator input.
2. Pulse width
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In order to surely input the signal to the S-77100/77101 Series, the pulse width to the ON pin and the OFF pin
should be 5 μs or longer.
5 s or longer
5 s or longer
ON
OFF
Figure 26
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