Improved decoupling for critical-function automotive MCUs

January 17, 2017 // By Graham Prophet
Murata’s three-terminal capacitors meet high speed processor needs in automobile safety systems; the NFM18HC series of ceramic multilayer capacitors are presented for use in high reliability automobile applications where the main application areas are in preventive safety systems and advanced driver assistance systems (ADAS).

NFM18HC series capacitors provide a three terminal multilayer ceramic capacitor in the company’s smallest 1.6 x 0.8 mm package (previous product was 2.0 x 1.2 mm). It conforms to AEC-Q200 for automobile applications, making an important contribution to further size reduction and tighter density for automotive electronics.


The three terminal multilayer ceramic capacitor has a smaller equivalent series inductance (ESL) than conventional two terminal multilayer ceramic capacitors, thus reducing the overall impedance. This lowers the number of capacitors that need to be used for higher frequency decoupling which frees up board space.


Similar caps have wide adoption for smartphones and other devices where compactness and high density are needed for high-speed processors. The use of three terminal multilayer ceramic capacitors in the automotive market has, Murata concludes, surged recently for ADAS, preventive safety systems, and in-vehicle infotainment (IVI).