參數(shù)資料
型號(hào)： 935189800118
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 諧振器
英文描述： HCT SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16
封裝： SOT-338-1, SSOP-16
文件頁(yè)數(shù)： 14/19頁(yè)
文件大小： 332K
代理商： 935189800118
December 1990
4
Philips Semiconductors
Product specication
Dual non-retriggerable monostable
multivibrator with reset
74HC/HCT221
Fig.4 Functional diagram.
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
↑ = LOW-to-HIGH level
↓ = HIGH-to-LOW level
= one HIGH-level output pulse
= one LOW-level output pulse
2. If the monostable was triggered before this condition
was established the pulse will continue as
programmed.
3. For this combination the reset input must be LOW and
the following sequence must be used:
pin 1 (or 9) must be set HIGH or pin 2 (or 10) set LOW;
then pin 1 (or 9) must be LOW and pin 2 (or 10) set
HIGH. Now the reset input goes from LOW-to-HIGH
and the device will be triggered.
INPUTS
OUTPUTS
nRD
nAnB
nQ
LX
X
L
H
XH
X
L (2)
H (2)
XX
L
L (2)
H (2)
HL
↑
H
↓
H
↑
LH
(3)
相關(guān)PDF資料
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935189810118 HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16
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