參數(shù)資料
型號: 74HC4059
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Programmable divide-by-n counter
中文描述: 可編程分頻氮計數(shù)器
文件頁數(shù): 10/20頁
文件大小: 147K
代理商: 74HC4059
1998 Jul 08
10
Philips Semiconductors
Product specification
Programmable divide-by-n counter
74HC/HCT4059
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
Note
1.
From master preset mode to any other mode.
INPUT
UNIT LOAD COEFFICIENT
CP
LE
J
n
K
a
K
b
K
c
0.65
0.65
0.50
1.00
1.50
0.85
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 to Q
propagation delay
LE to Q
output transition time
24
46
58
69
ns
4.5
Fig.7
t
PHL
/ t
PLH
24
46
58
69
ns
4.5
Fig.8
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Fig.7
t
W
clock pulse width
CP
removal time
K
b
, K
c
to CP
maximum clock pulse
frequency
20
7
25
30
ns
4.5
Fig.7
t
rem
15
7
9
22
ns
4.5
Fig.9; note 1
f
max
21
36
17
14
MHz
4.5
Fig.7
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