74hct423pw NXP Semiconductors, 74hct423pw Datasheet - Page 7

• Manufacturer Part Number: 74hct423pw
• Description: Dual Retriggerable Monostable Multivibrator With Reset
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard (except for nR
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
1998 Jul 08
CC
INPUT
nA, nB
nR
t
t
t
t
t
t
t
t
t
R
C
SYMBOL PARAMETER
PHL
PHL
THL
W
W
W
W
W
rt
EXT
EXT
Dual retriggerable monostable
multivibrator with reset
category: MSI
D
/ t
/ t
/ t
TLH
PLH
PLH
r
propagation delay
propagation delay
output transition time
trigger pulse width
trigger pulse width
reset pulse width
output pulse width
output pulse width
retrigger time
external timing resistor
external timing
capacitor
nA, nB to nQ, nQ
nR
nA = LOW
nB = HIGH
nR
nQ = HIGH
nQ = LOW
nQ = HIGH
nQ = LOW
nA, nB
= t
CC
f
D
D
= 6 ns; C
to nQ, nQ
= LOW
UNIT LOAD COEFFICIENT
0.35
0.50
per input, multiply this value by the unit load coefficient shown in the table below.
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
min. typ. max. min. max. min. max.
20
20
20
2
no limits
EXT
30
26
7
5
5
7
450
75
110
/C
25
EXT
)
51
48
15
1000
CC
) for a unit load of 1 is given in the family specifications.
T
74HCT
amb
25
25
25
7
40 to 85
( C)
64
60
19
30
30
30
40 to 125
77
72
22
ns
ns
ns
ns
ns
ns
ns
ns
k
pF
.
UNIT
s
74HC/HCT423
V
4.5
4.5
4.5
4.5
4.5
4.5
5.0
5.0
5.0
5.0
5.0
(V)
CC
TEST CONDITIONS
Product specification
C
R
C
R
Fig.7
Fig.7
Fig.8
C
R
Figs 7 and 8
C
R
note 1; Figs 7 and
8
C
R
note 2; Fig.7
Fig.9
Fig.9; note 3
WAVEFORMS/
EXT
EXT
EXT
EXT
EXT
EXT
EXT
EXT
EXT
EXT
NOTES
= 0 pF;
= 5 k
= 0 pF;
= 5 k
= 100 nF;
= 10 k ;
= 0 pF;
= 5 k ;
= 0 pF;
= 5 k ;