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參數(shù)資料
| 型號(hào)： | 74F191 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Up/down binary counter with reset and ripple clock |
| 中文描述： | 上/下的復(fù)位和時(shí)鐘波紋二進(jìn)制計(jì)數(shù)器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 104K |
| 代理商： | 74F191 |
Philips Semiconductors
Product specification
74F191
Up/Down binary counter with reset and ripple clock
1995 Jul 17
4
MODE SELECT — FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
PL
U/D
CE
CP
D
n
Q
n
L
L
X
X
X
X
X
X
L
H
L
H
Parallel load
H
L
l
↑
X
Count up
Count up
H
H
l
↑
X
Count down
Count down
H
X
H
X
X
No change
Hold (do nothing)
TC AND RC FUNCTION TABLE
INPUTS
TERMINAL COUNT STATE
OUTPUTS
U/D
CE
CP
Q
0
H
Q
1
H
Q
2
H
Q
3
H
TC
RC
H
H
X
L
H
L
L
H
L
X
H
H
H
H
H
H
H
H
H
H
H
L
H
X
L
L
L
L
L
H
H
H
H
L
X
L
L
L
L
L
L
L
L
H
H
H
H = High voltage level steady state
L = Low voltage level steady state
X = Don’t care
= Low pulse
↑
= Low-to-High clock transition
l
= Low voltage level one set-up time prior to the Low-to-High clock transition
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| 74F191 | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SC | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191SJ | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191PC | Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191 | Up/Down Binary Counter with Preset and Ripple Clock |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74F191_07 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Synchronous Up/Down Counter |
| 74F191DCQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DCX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Up/Down Binary Counter with Preset and Ripple Clock |
| 74F191DMQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Up/Down Binary Counter with Preset and Ripple Clock |
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