AEC-Q100 SPDT switch for 12V/24V/48V automotive signal chains
The Texas Instruments TMUX7219DGKRQ1 is a single-pole double-throw (SPDT) analog switch that routes one of two signal paths to a common output. The switch handles single-supply rails from 4.5 V up to 44 V, or dual supplies from ±4.5 V to ±22 V, which covers 12 V and 24 V automotive buses as well as 48 V industrial rails without external level translation. On-resistance is rated at 2.8 Ω maximum, with channel-to-channel matching of 100 mΩ, keeping insertion loss and gain error low in precision analog paths. The -3 dB bandwidth of 40 MHz and crosstalk of -106 dB at 1 MHz mean the part can multiplex audio, low-frequency sensor outputs, or moderate-speed digital signals without degrading signal integrity.