A 6.8 ns 1 Mb ECL I/O BiCMOS configurable SRAM

A 1-Mb ECL (emitter coupled logic) I/O SRAM which has been fabricated using 0.8-μm BiCMOS technology is described. The die is configurable to four different organizations (1 Mb×1, 1 Mb×1 with differential output, 512 K×2 with differential output, and 256 K×4) by way of bonding options. The device, with a die size of 240 mil×475 mil, has a typical access time of 6.8 ns and is 10 K or 100 K I/O compatible with a metal option