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8-Channel Fault-Protected

358

©2004 Maxwell Technologies

All rights reserved.

Analog Multiplexer

02.06.04 Rev 3

ation

• Total dose hardness:

- > 50 krad (Si), depending upon space mission

• Excellent Single Event Effect

- SEL

2

- SEU

2

• Package:

• All switches off with power supplies off

• On channel turns OFF if overvoltage occurs

• Only nanoamperes of input current under all fault condi-

tions

• Operates from ±4.5 to ±18V supplies

• All digital inputs are TTL and CMOS compatible

• Significantly reduced power consumption

Maxwells’s 358 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.

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® provides true greater than

50 krad (Si) total radiation dose tolerance, dependent upon

space mission. This product is available with packaging and

screening up to Class S.

Logic Diagram