Fig. 1. Electrical layout of Hypnos. Its main characteristics are industrial temperature range components (–20 to +70°C); maximum of eight redox inputs; very low power consumption (input current typically = 1 pA); electrostatic discharge protected input of 2 kV; surface mount assembly techniques; ferroelectric nonvolatile random access memory (FRAM); water resistance: IP67. MUX, multiplexer; RTC, real-time clock.