FT8010 데이터 시트보기 (PDF) - ON Semiconductor

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FT8010

Reset Timer with Configurable Delay Time

ON Semiconductor 

Long Duration (tW > N)

In this case, inputs /SR0 and /SR1 are LOW for a

duration, tW, which is longer than time N. When an

input goes LOW, the internal timer starts counting.

After time N, the outputs switch and the timer stops

counting. The input goes HIGH sometime after N

seconds. When the input goes HIGH, the timer resets

and the outputs switch back to their original state after

a propagation delay (see Figure 5).

/SR0

L

/SR1

L

/RST1

RST2

Description

The timer starts counting when both inputs go LOW. After time N, the

outputs switch. When either input goes HIGH, the timer resets and the

outputs switch back to their original state. Both /SR0 and /SR1 need to

be LOW to activate (start) the timer.

Figure 5. Long Duration Waveform

Note:

3. Waveforms not drawn to scale (tpHL1, tpLH1 >> tpHL2, tpLH2).

© 2009 Fairchild Semiconductor Corporation

FT8010 • Rev. 1.0.8

5

www.fairchildsemi.com

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