A VLSI chip set for a small mainframe processor

A CMOS VLSI chip set, which consists of three chips including a chip with 495000 transistors, 0.8-ns gate delay, and a 12-ns RAM, has been developed to achieve a high-performance 32-bit mainframe processor. This chip set uses a 1.2- mu m double-diffused-drain transistor, double-layer metallization technology and a sophisticated CAD (computer-aided design) system. Each chip is mounted on a 288-pin surface-mount pin grid array package. A one-board CPU can be realized by assembling the chip set on a multilayer printed wiring board with RAMS and interface LSIs.<
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