New radiation hardened multiplexers

Intersil Corporation introduces the ISL71840SEH and ISL71841SEH. The devices are radiation hardened multiplexers that offer best-in-class electrostatic discharge (ESD) protection. The ISL71840SEH and ISL71841SEH are the industry's highest signal chain accuracy and timing performance. The ISL71840SEH 30V 16-channel multiplexer is a drop-in replacement for Intersil's widely adopted HS9-1840ARH, which has been aboard nearly every satellite and space exploration mission, including NASA's recent Orion spacecraft flight test. For applications with form factor constraints, the new ISL71841SEH 30 V 32-channel multiplexer offers high performance and 41% reduced board space compared with an ISL71840SEH two-chip solution.

The ISL71840SEH and ISL71841SEH rad hard multiplexers deliver ultra-high performance in the most demanding environments by leveraging Intersil's proprietary silicon on insulator process, which provides single event latch-up (SEL) robustness in heavy ion environments. The enhanced 8kV ESD protection feature of these devices eliminates the need for costly external protection diodes on the input pins. And their reduced RON of 500 Ohms at +/-5 V and propagation delays of less than 800 ns increase the overall performance and accuracy of telemetry signals processed and multiplexed into an analog-to-digital converter (ADC) input.