HEF40106BD datasheet(6/7 Pages) ETC2

Part #	HEF40106BD

Description	Hex inverting Schmitt trigger

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6 / 7 page

January 1995

6

Philips Semiconductors

Product speciﬁcation

Hex inverting Schmitt trigger

HEF40106B

gates

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:

, 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.

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).

C

p

-------

V

DD

V

SS

–

V

H

---------------------------

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