74HC423 Datasheet, PDF (12/23 Pages) NXP Semiconductors – Dual retriggerable monostable multivibrator with reset

NXP Semiconductors
74HC423; 74HCT423
Dual retriggerable monostable multivibrator with reset
10⁶
t_W
(ns)
10⁵
10⁴
10³
10²
001aaa611
(1)
(2)
(3)
(4)
0.8
'K' factor
0.6
0.4
0.2
001aaa612
10
1
10
10²
10³
10⁴
C_EXT (pF)
0
0
2
4
6
8
V_CC (V)
V_CC = 5.0 V and T_amb = 25 °C.
(1) R_EXT = 100 kΩ.
(2) R_EXT = 50 kΩ.
(3) R_EXT = 10 kΩ.
(4) R_EXT = 2 kΩ.
Fig 8. Typical output pulse width as a function of the
external capacitor values
External capacitance = 10 nF,
external resistance = 10 kΩ to 100 kΩ and T_amb = 25 °C.
Fig 9. Typical ‘K’ factor
nB input
t_W
nA input
t_rt
nQ output
t_W
t_W
t_W
nRD = HIGH.
Fig 10. Output pulse control using retrigger pulse (t_rtrig)
t_W
mna521
74HC_HCT423_3
Product data sheet
Rev. 03 — 24 July 2008
© NXP B.V. 2008. All rights reserved.
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