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SN74HC191DR 데이터시트(PDF) 7 Page - Texas Instruments

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부품명 SN74HC191DR
상세설명  4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
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SN74HC191DR 데이터시트(HTML) 7 Page - Texas Instruments

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SN54HC191, SN74HC191
4BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
SCLS121D − DECEMBER 1982 − REVISED OCTOBER 2003
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
VCC
TA = 25°C
SN54HC191
SN74HC191
UNIT
VCC
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
4.2
2.8
3.3
fclock
Clock frequency
4.5 V
21
14
17
MHz
fclock
Clock frequency
6 V
24
16
19
MHz
2 V
120
180
150
LOAD low
4.5 V
24
36
30
tw
Pulse duration
LOAD low
6 V
21
31
26
ns
tw
Pulse duration
2 V
120
180
150
ns
CLK high or low
4.5 V
24
36
30
CLK high or low
6 V
21
31
26
2 V
150
230
188
Data before LOAD
4.5 V
30
46
38
Data before LOAD
6 V
25
38
32
2 V
205
306
255
CTEN before CLK
4.5 V
41
61
51
tsu
Setup time
CTEN before CLK
6 V
35
53
44
ns
tsu
Setup time
2 V
205
306
255
ns
D/U before CLK
4.5 V
41
61
51
D/U before CLK
6 V
35
53
44
2 V
150
225
190
LOAD inactive before CLK
4.5 V
30
45
38
LOAD inactive before CLK
6 V
25
38
32
2 V
5
5
5
Data after LOAD
4.5 V
5
5
5
Data after LOAD
6 V
5
5
5
2 V
5
5
5
th
Hold time
CTEN after CLK
4.5 V
5
5
5
ns
th
Hold time
CTEN after CLK
6 V
5
5
5
ns
2 V
5
5
5
D/U after CLK
4.5 V
5
5
5
D/U after CLK
6 V
5
5
5


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