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參數(shù)資料
| 型號： | 935200660112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 門電路 |
| 英文描述： | 4000/14000/40000 SERIES, QUAD 2-INPUT NAND GATE, PDSO14 |
| 封裝： | PLASTIC, SOT-108-1, SO-14 |
| 文件頁數(shù)： | 6/6頁 |
| 文件大?。?/td> | 78K |
| 代理商： | 935200660112 |
January 1995
6
Philips Semiconductors
Product specication
Quadruple 2-input NAND Schmitt trigger
HEF4093B
gates
Fig.9 Typical switching levels as a function of supply voltage VDD;Tamb =25 °C.
APPLICATION INFORMATION
Some examples of applications for the HEF4093B are:
Wave and pulse shapers
Astable multivibrators
Monostable multivibrators.
Fig.10 The HEF4093B used as a astable multivibrator.
Fig.11 Schmitt trigger driven via a high impedance
(R
> 1k).
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:
Cp is the external parasitic capacitance between inputs and output; the value depends on the circuit board layout.
Note
The two inputs may be connected together, but this will result in a larger through-current at the moment of switching.
C
p
-------
V
DD
V
SS
–
V
H
---------------------------
, otherwise oscillation can occur on the edges of a pulse.
>
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