Monolithic System Technology (MST) is a microelectronic circuit family consisting of high-density monolithic circuit chips on ceramic substrates. Using current-switch emitter follower (CSEF) logic, the technology is designed to provide a balanced reflection of cost and performance requirements. One version, MST-2, has been developed for use primarily in the middle range of System/370—the Models 145 and 155. The typical package usually consists of a single multi-circuit chip on a 16-pin module substrate, and the design embodies a number of recent interconnection and packaging developments that make it well suited to large-scale automated production.
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