74hct423pw NXP Semiconductors, 74hct423pw Datasheet - Page 8

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

Philips Semiconductors
Notes
1. For other R
2. The time to retrigger the monostable multivibrator depends on the values of R
3. When the device is powered-up, initiate the device via a reset pulse, when C
AC WAVEFORMS
1998 Jul 08
Dual retriggerable monostable
multivibrator with reset
If C
The inherent test jig and pin capacitance at pins 15 and 7 (nR
The output pulse width will only be extended when the time between the active-going edges of the trigger input pulses
meets the minimum retrigger time.
If C
The inherent test jig and pin capacitance at pins 15 and 7 (nR
where: t
where, t
EXT
EXT
t
R
K
C
R
W
rt
W
t
10 pF, the next formula is valid:
10 pF, the next formula (at V
rt
EXT
EXT
EXT
= K
= 30
EXT
= output pulse width in ns;
= retrigger time in ns;
= external resistor in k ; C
= external capacitor in pF;
= external resistor in k .
= constant = 0.45 for V
and C
R
0.19
EXT
EXT
C
Fig.7 Output pulse control using retrigger pulse; nR
R
Fig.8 Output pulse control using reset input nR
combinations see Fig.9.
EXT
EXT
(typ.)
C
EXT
0.9
CC
CC
= 5.0 V and 0.55 for V
= 5.0 V) for the set-up time of a retrigger pulse is valid:
EXT
13
= external capacitor in pF;
R
EXT
1.05
8
(typ.)
EXT
EXT
CC
/C
/C
= 2.0 V.
EXT
EXT
) is approximately 7 pF.
) is 7 pF.
D
; nA = LOW.
D
EXT
EXT
= HIGH.
and C
50 pF.
EXT
74HC/HCT423
.
Product specification