參數(shù)資料
型號: 74HC273
廠商: NXP Semiconductors N.V.
英文描述: Octal D-type flip-flop with reset; positive-edge trigger
中文描述: 八路D型觸發(fā)器的復位觸發(fā)器,積極邊緣觸發(fā)
文件頁數(shù): 6/8頁
文件大小: 58K
代理商: 74HC273
September 1993
6
Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
74HC/HCT273
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
MR
CP
D
n
1.00
1.75
0.15
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
MR to Q
n
output transition time
16
30
38
45
ns
4.5
Fig.6
t
PHL
23
34
43
51
ns
4.5
Fig.7
t
THL
/ t
TLH
7
15
19
22
ns
4.5
Fig.6
t
W
clock pulse width
HIGH or LOW
master reset pulse width
LOW
removal time
MR to CP
set-up time
D
n
to CP
hold time
D
n
to CP
maximum clock pulse
frequency
16
9
20
24
ns
4.5
Fig.6
t
W
16
8
20
24
ns
4.5
Fig.7
t
rem
10
2
13
15
ns
4.5
Fig.7
t
su
12
5
15
18
ns
4.5
Fig.8
t
h
3
4
3
3
ns
4.5
Fig.8
f
max
30
56
24
20
MHz
4.5
Fig.6
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