器件名称:
74HC9323AD
功能描述:
Programmable ripple counter with oscillator 3-State
文件大小:
44.43KB 共6页
简 介:
INTEGRATED CIRCUITS 74HC/HCT9323A Programmable ripple counter with oscillator (3-State) Objective specification IC06 Data Handbook 1995 Oct 27 Philips Semiconductors Philips Semiconductors Objective specification Programmable ripple counter with oscillator (3-State) 74HC/HCT9323A FEATURES 8-pin space saving package Programmable 3-stage ripple counter Suitable for over-tone crystal application up to 85MHz 3-State output buffer Two internal capacitors Recommended operating range for use with third overtone crystals 3V to 6V (VCC = 5V"10%) DESCRIPTION The 74HC/HCT9323A are high-speed Si-gate CMOS devices. They are specified in compliance with JEDEC standard no. 7A. The HC/HCT 9323A are oscillators designed for quartz crystal combined with a programmable 3-State counter, a 3-State output buffer and an overriding asynchronous master reset (MR). With the two select inputs S1 and S2 the counter can be switched in the divide-1, 2, 4 or 8 mode. If left floating the clock is divided by 8. The oscillator is designed to operate either in the fundamental or third overtone mode depending on the crystal and external components applied. On-chip capacitors minimize external component count for third overtone crystal applications. The oscillator may be replaced by an external clock signal at input X1. In this event the other oscillator pin (X2) must be floating. The counter advances on the negative-going transition of X1. A LOW level on MR resets the counter, stops the oscillat……
