A 250-Mb/s 32*32 CMOS crosspoint LSI for ATM switching systems

A 32*32 crosspoint LSI and a time-slot controlled asynchronous-transfer-mode (ATM) switch architecture utilizing the LSI are presented. The ATM switch, which is classified as an input-buffer-type ATM switch, enables 99% throughput and broadcasting capability. The crosspoint LSI is characterized by the bit-map oriented and pipelined connection control method which can switch and broadcast 160-Mb/s ATM cells, 32*32 switch cells which have less parasitic capacitance, and emitter-coupled-logic (ECL) compatible interfaces which are compatible with a 160-MHz broadband ISDN data rate. The LSI has been fabricated by a 1- mu m CMOS process. The chip size is 7.4 mm*7.4 mm. According to the evaluation, operation at 250 Mb/s is confirmed. 1.2-W power consumption is observed at 160-Mb/s operating condition.<
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