The AT68166 is a 16-Mbit SRAM packaged in a hermetic Multi-Chip Module (MCM) for space applications. MCM packaging technology offers the advantages of reducing PCB real estate, the number of individual components and improves overall electronic effectiveness. This allows a reduction of the PCB area by 50% with a weight savings of 75% compared to four 4-Mbit packages. The AT68166 incorporates four 4-Mbit AT60142 SRAM dice which are produced on Atmel's radiation-hardened 0.25um CMOS process. The device is a very low-power CMOS asynchronous SRAM and can be organised as either one bank of 512Kx32, two banks of 512Kx16 or four banks of 512Kx8. It combines rad-hard capabilities, a latch-up threshold of 80 MeV.cm2/mg and a total dose of 300 Krad, with a fast access time. The AT68166 operates at 3.3V and is available in two versions: the AT68166FT with 5V-tolerance inputs and the AT68166F for 3V operation. The access times are 25 and 20ns, respectively, over the full military temperature range. Both versions come in a 68-lead flat pack.
