參數(shù)資料
型號(hào): 74HC192
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Presettable synchronous BCD decade up/down counter
中文描述: 可預(yù)置同步BCD碼十年向上/向下計(jì)數(shù)器
文件頁數(shù): 8/13頁
文件大?。?/td> 90K
代理商: 74HC192
December 1990
8
Philips Semiconductors
Product specification
Presettable synchronous BCD decade
up/down counter
74HC/HCT192
t
W
up clock pulse width
HIGH or LOW
120
24
20
140
28
24
80
16
14
80
16
14
50
10
9
50
10
9
80
16
14
0
0
0
80
16
14
4.0
20
24
39
14
11
50
18
14
22
8
6
22
8
6
3
1
1
0
0
0
22
8
6
14
5
4
19
7
6
12
36
43
150
30
26
175
35
30
100
20
17
100
20
17
65
13
11
65
13
11
100
20
17
0
0
0
100
20
17
3.2
16
19
180
36
31
210
42
36
120
24
20
120
24
20
75
15
13
75
15
13
120
24
20
0
0
0
120
24
20
2.6
13
15
ns
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
Fig.7
t
W
down clock pulse width
HIGH or LOW
ns
Fig.7
t
W
master reset pulse width
HIGH
ns
Fig.10
t
W
parallel load pulse width
LOW
ns
Fig.9
t
rem
removal time
PL to CP
U
, CP
D
ns
Fig.9
t
rem
removal time
MR to CP
U
, CP
D
ns
Fig.10
t
su
set-up time
D
n
to PL
ns
Fig.11 note:
CP
U
= CP
D
=
HIGH
Fig.11
t
h
hold time
D
n
to PL
ns
t
h
hold time
CP
U
to CP
D
,
CP
D
to CP
U
maximum up, down clock
pulse frequency
ns
Fig.13
f
max
MHz
Fig.7
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min. max. min.
max.
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