參數(shù)資料
型號: 74HC423PW
廠商: NXP SEMICONDUCTORS
元件分類: 諧振器
英文描述: Dual retriggerable monostable multivibrator with reset
中文描述: HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16
文件頁數(shù): 7/14頁
文件大?。?/td> 103K
代理商: 74HC423PW
1998 Jul 08
7
Philips Semiconductors
Product specification
Dual retriggerable monostable
multivibrator with reset
74HC/HCT423
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: standard (except for nR
EXT
/C
EXT
)
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
nA, nB
nR
D
0.35
0.50
SYMBOL PARAMETER
T
amb
(
°
C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS/
NOTES
+
25
40 to
+
85
40 to
+
125
min. typ. max. min. max. min.
max.
t
PHL
/ t
PLH
propagation delay
nA, nB to nQ, nQ
propagation delay
nR
D
to nQ, nQ
output transition time
30
51
64
77
ns
4.5
C
EXT
= 0 pF;
R
EXT
= 5 k
C
EXT
= 0 pF;
R
EXT
= 5 k
t
PHL
/ t
PLH
26
48
60
72
ns
4.5
t
THL
/ t
TLH
7
15
19
22
ns
4.5
t
W
trigger pulse width
nA = LOW
trigger pulse width
nB = HIGH
reset pulse width
nR
D
= LOW
output pulse width
nQ = HIGH
nQ = LOW
output pulse width
nQ = HIGH
nQ = LOW
20
5
25
30
ns
4.5
Fig.7
t
W
20
5
25
30
ns
4.5
Fig.7
t
W
20
7
25
30
ns
4.5
Fig.8
t
W
450
μ
s
5.0
C
EXT
= 100 nF;
R
EXT
= 10 k
;
Figs 7 and 8
C
EXT
= 0 pF;
R
EXT
= 5 k
;
note 1; Figs 7 and
8
C
EXT
= 0 pF;
R
EXT
= 5 k
;
note 2; Fig.7
Fig.9
Fig.9; note 3
t
W
75
ns
5.0
t
rt
retrigger time
nA, nB
110
ns
5.0
R
EXT
C
EXT
external timing resistor
external timing
capacitor
2
no limits
1000
k
pF
5.0
5.0
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