74hct423 NXP Semiconductors, 74hct423 Datasheet - Page 7

• Manufacturer Part Number: 74hct423
• 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
Dual retriggerable monostable
multivibrator with reset
EXT
EXT
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
= t
nA, nB to nQ, nQ
nR
nA = LOW
nB = HIGH
nR
nQ = HIGH
nQ = LOW
nQ = HIGH
nQ = LOW
nA, nB
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)
TEST CONDITIONS
CC
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 ;