358RPFB

Maxwells's 358RPFB 8-Channel single-ended (1 of 8) multiplexers with fault protection features a greater than 50 krad (Si) total dose tolerance, depending upon space mission. Using a series N-channel, P-channel, N-channel structure, these multi-plexers provide significantly improved fault protection. If the power supplies to the fault-protected multiplexer are inadvert-ently turned off while input voltages are still applied, all chan-nels in the multiplexer are turned off, and only a few nanoamperes of leakage current will flow into the inputs. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources which drive the multiplexer. All digital inputs have logic thresh-olds of 0.8V and 2.4V, ensuring both TTL and CMOS compati-bility without requiring pullup resistors. Break-before-make operation is guaranteed. Power supply currents have been reduced and typical power dissipation is less than 2 mW.

Maxwell Technologies' patented R_AD-P_AK^®packaging technol-ogy incorporates radiation shielding in the microcircuit pack-age. It eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or a space mission. In a GEO orbit, Rad-Pak(R) provides true greater than 50 krad (Si) total radiation dose tolerance, dependent upon space mission. 358RPFB is available with packaging and screening up to Class S.