參數(shù)資料
型號(hào): 74F191PC
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 通用總線功能
英文描述: Up/Down Binary Counter with Preset and Ripple Clock
中文描述: F/FAST SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16
封裝: 0.300 INCH, PLASTIC, DIP-16
文件頁(yè)數(shù): 4/14頁(yè)
文件大?。?/td> 104K
代理商: 74F191PC
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
相關(guān)PDF資料
PDF描述
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
74F193 Up/down binary counter with separate up/down clocks(帶分離加減時(shí)鐘的加減二進(jìn)制計(jì)數(shù)器)
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