器件名称:
74HC423N
功能描述:
Dual retriggerable monostable multivibrator with reset
文件大小:
103.73KB 共14页
简 介:
INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications The IC06 74HC/HCT/HCU/HCMOS Logic Package Information The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT423 Dual retriggerable monostable multivibrator with reset Product specication Supersedes data of December 1990 File under Integrated Circuits, IC06 1998 Jul 08 Philips Semiconductors Product specication Dual retriggerable monostable multivibrator with reset FEATURES DC triggered from active HIGH or active LOW inputs Retriggerable for very long pulses up to 100% duty factor Direct reset terminates output pulse Schmitt-trigger action on all inputs except for the reset input Output capability: standard (except for nREXT/CEXT) ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT423 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT423 are dual retriggerable monostable multivibrators with output pulse width control by two methods. The basic pulse time is programmed by selection of an external resistor (REXT) and capacitor 74HC/HCT423 (CEXT). The external resistor and capacitor are normally connected as shown in Fig.6. Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By repeating this process, t……
