HEF40106BP 데이터 시트보기 (PDF) - Philips Electronics

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HEF40106BP

Hex inverting Schmitt trigger

Philips Electronics 

Philips Semiconductors

Hex inverting Schmitt trigger

Product specification

HEF40106B

gates

Fig.9 Typical switching levels as a function of supply voltage VDD; Tamb = 25 °C.

Fig.10 Schmitt trigger driven via a high impedance (R > 1 kΩ).

If a Schmitt trigger is driven via a high impedance (R > 1 kΩ) then it is necessary to incorporate a capacitor C of such

value that:

--C----

Cp

>

V-----D---D-----–-----V----S---S--

VH

, otherwise oscillation can occur on the edges of a pulse.

Cp is the external parasitic capacitance between input and output; the value depends on the circuit board layout.

January 1995

6

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