參數(shù)資料
型號: 74HCT163
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Presettable synchronous 4-bit binary counter; asynchronous reset(可預(yù)置的同步4位二進(jìn)制計(jì)數(shù)器;異步復(fù)位;)
中文描述: 可預(yù)置同步4位二進(jìn)制計(jì)數(shù)器,異步復(fù)位(可預(yù)置的同步4位二進(jìn)制計(jì)數(shù)器,異步復(fù)位;)
文件頁數(shù): 9/11頁
文件大小: 86K
代理商: 74HCT163
December 1990
9
Philips Semiconductors
Product specification
Presettable synchronous 4-bit binary
counter; synchronous reset
74HC/HCT163
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
= t
f
= 6 ns; C
L
= 50 pF
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
n
propagation delay
CP to TC
propagation delay
CET to TC
output transition time
23
39
49
59
ns
4.5
Fig.8
t
PHL
/ t
PLH
29
49
61
74
ns
4.5
Fig.8
t
PHL
/ t
PLH
17
32
44
48
ns
4.5
Fig.9
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Figs 8 and 9
t
W
clock pulse width
HIGH or LOW
set-up time
MR, D
n
to CP
set-up time
PE to CP
set-up time
CEP, CET to CP
hold time
D
n
, PE, CEP,
CET, MR to CP
maximum clock pulse
frequency
20
6
25
30
ns
4.5
Fig.8
t
su
20
9
25
30
ns
4.5
Figs 10 and 11
t
su
20
11
25
30
ns
4.5
Fig.10
t
su
40
24
50
60
ns
4.5
Fig.12
t
h
0
5
0
0
ns
4.5
Figs 10, 11 and 12
f
max
26
45
21
17
MHz
4.5
Fig.8
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