參數(shù)資料
型號: 74HC123
廠商: NXP Semiconductors N.V.
英文描述: Dual retriggerable monostable multivibrator with reset
中文描述: 雙retriggerable單穩(wěn)態(tài)觸發(fā)器的復位
文件頁數(shù): 4/17頁
文件大?。?/td> 124K
代理商: 74HC123
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
nR
D
L
X
X
H
nA
nB
nQ
nQ
X
H
X
L
X
X
L
L
L
(1)
L
(1)
H
H
(1)
H
(1)
H
H
L
H
H
L
X
= HIGH voltage level
= LOW voltage level
= 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 (2C
)
and 14 (1C
EXT
) externally to pin 8 (GND).
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