54/7490A中文资料etc未分类制造商数据手册PDF规格书

厂商型号	54/7490A
功能描述	The ’90 is a 4-stage ripple counter containing a high speed flip-flop acting as a divide-by-two and three flip-flops connected as a divideby- five counter.
文件大小	306.59 Kbytes
页面数量	3 页
生产厂商	List of Unclassifed Manufacturers
企业简称	ETC1【etc未分类制造商】
中文名称	未分类制造商
原厂标识
数据手册	下载地址一下载地址二
更新时间	2025-5-27 19:41:00
人工找货	54/7490A价格和库存，欢迎联系客服免费人工找货

DESCRIPTION — The ’90 is a 4-stage ripple counter containing a high speed

flip-flop acting as a divide-by-two and three flip-flops connected as a divideby-

five counter. It can be connected to operate with a conventional BCD output

pattern or it can be connected to provide a 50 duty cycle output. In the

BCD mode, HIGH signals on the Master Set (MS) inputs set the outputs to

BCD nine. HIGH signals on the Master Reset (MR) inputs force all outputs

LOW. For a similar counter with corner power pins, see the ’LS290; for dual

versions, see the ’LS390 and ’LS490.