74HC590 PDF资料下载

功能：8位二进制计数器/寄存器（ 3态输出） This device each contains an 8-bit binary counter that feeds an 8-bit storage register. The storage register has parallel outputs. Separate clocks are provided for both the binary counter and storage register. The binary counter features a direct clear input CCLR and a count enable input C CKEN. For cascading a ripple