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ＭＭ５８１６７Ｂ 是美国国家半导体公司生产的一个应用于总线型微处理系统的ＣＭＯＳ 器件，该器件能为微处理系统提供精确的实时时钟。本文详细介绍了它的各功能模块、性能及其应用。
The MM58167B is a CMOS device manufactured by National Semiconductor that is used in a bus-based microprocessor system to provide a precise real-time clock to a microprocessor. This article describes in detail its various functional modules, performance and its application.