HEF40106BT 参数 Datasheet PDF下载

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

HEF40106B

gates

Fig.9 Typical switching levels as a function of supply voltage V

DD

; T

amb

= 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

C V

DD

–

V

SS

-

-

value that:

------

>

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

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

V

H

C

p

C

p

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

January 1995

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