參數(shù)資料
型號: 74HC93
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: 4-bit binary ripple counter
中文描述: 4位二進制紋波計數(shù)器
文件頁數(shù): 6/7頁
文件大小: 45K
代理商: 74HC93
December 1990
6
Philips Semiconductors
Product specification
4-bit binary ripple counter
74HC/HCT93
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (
I
CC
) for a unit load of 1 is given in the family specifications.
To determine
I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
INPUT
UNIT LOAD COEFFICIENT
CP
0
, CP
1
MR
n
0.60
0.40
SYMBOL
PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+
25
40 to
+
85
40 to
+
125
min.
typ.
max.
min.
max.
min.
max.
t
PHL
/ t
PLH
propagation delay
CP
0
to Q
0
propagation delay
CP
1
to Q
1
propagation delay
CP
1
to Q
2
propagation delay
CP
1
to Q
3
propagation delay
MR
n
to Q
n
output transition time
18
34
43
51
ns
4.5
Fig.6
t
PHL
/ t
PLH
18
34
43
51
ns
4.5
Fig.6
t
PHL
/ t
PLH
24
46
58
69
ns
4.5
Fig.6
t
PHL
/ t
PLH
30
58
73
87
ns
4.5
Fig.6
t
PHL
17
33
41
50
ns
4.5
Fig.7
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Fig.6
t
rem
removal time
MR
n
to CP
0
, CP
1
pulse width
CP
0
, CP
1
master reset pulse width
MR
n
maximum clock pulse
frequency
CP
0
, CP
1
10
3
13
15
ns
4.5
Fig.7
t
W
16
7
20
24
ns
4.5
Fig.6
t
W
16
5
20
24
ns
4.5
Fig.7
f
max
30
70
24
20
MHz
4.5
Fig.6
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