HEF4093 Philips Semiconductors, HEF4093 Datasheet - Page 6

• Manufacturer Part Number: HEF4093
• Description: Quadruple 2-input NAND Schmitt trigger
• Manufacturer: Philips Semiconductors

Philips Semiconductors
APPLICATION INFORMATION
Some examples of applications for the HEF4093B are:
If a Schmitt trigger is driven via a high impedance (R > 1 k ) then it is necessary to incorporate a capacitor C of such
value that:
C
Note
The two inputs may be connected together, but this will result in a larger through-current at the moment of switching.
January 1995
Fig.10 The HEF4093B used as a astable multivibrator.
p
Wave and pulse shapers
Astable multivibrators
Monostable multivibrators.
Quadruple 2-input NAND Schmitt trigger
is the external parasitic capacitance between inputs and output; the value depends on the circuit board layout.
------ -
C
C
p
V
-------------------------- - , otherwise oscillation can occur on the edges of a pulse.
DD
V
–
H
V
SS
Fig.9 Typical switching levels as a function of supply voltage V
6
Fig.11 Schmitt trigger driven via a high impedance
(R 1 k ).
DD
; T
amb
= 25 C.
Product specification
HEF4093B
gates