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74HC123DB Scheda tecnica(PDF) 4 Page - NXP Semiconductors

Il numero della parte 74HC123DB
Spiegazioni elettronici  Dual retriggerable monostable multivibrator with reset
PDF  17 Pages
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC123DB Scheda tecnica(HTML) 4 Page - NXP Semiconductors

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1998 Jul 08
4
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT123
Fig.4 Functional diagram.
FUNCTION TABLE
Note
1. If the monostable was triggered
before this condition was
established, the pulse will
continue as programmed.
INPUTS
OUTPUTS
nRD
nAnB
nQ
nQ
LX
X
L
H
XH
X
L(1)
H(1)
XX
L
L(1)
H(1)
HL
↑
H
↓
H
↑
LH
H
= HIGH voltage level
L
= LOW voltage level
X
= don’t care
↑
= LOW-to-HIGH transition
↓
= HIGH-to-LOW transition
= one HIGH level output pulse
= one LOW level output pulse
Fig.5 Logic diagram.
(1) For minimum noise generation,
it is recommended to ground pins 6 (2CEXT)
and 14 (1CEXT) externally to pin 8 (GND).



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