74197 TTL 二进制可预置锁存器、计数器
The '197 ripple counter contains divide-by-two and divideby-eight sections which can be combi...
The '197 ripple counter contains divide-by-two and divideby-eight sections which can be combi...
197 为可预置的二－八－十六进制计数器，共有 54/74197、 54/74S197、 54/74LS197 三种线路结构形式...