High-voltage SP8T mux for industrial signal routing
The Texas Instruments TMUX8108PWR is a single-pole, eight-throw (SP8T) analog multiplexer/demultiplexer that routes one common I/O to eight independent channels. Its standout feature is the wide single-supply range of 10V to 100V, which covers 12V, 24V, 48V, and 96V industrial rails without needing a separate negative supply. The 16-TSSOP package keeps board area small for multi-channel ATE, data acquisition, and programmable logic controller (PLC) analog input cards.
Crosstalk and bandwidth — what they mean for signal integrity
Crosstalk is rated at -100dB at 100kHz, which means adjacent channels stay well isolated when scanning through sensor arrays or multiplexing precision analog signals. The 200MHz -3dB bandwidth is more than enough for baseband analog signals up to several MHz — think audio, vibration, or slow-speed ADC front-ends. For RF or video switching above 10 MHz, look at a dedicated RF switch; this part is built for precision, not speed.
On-resistance and charge injection — fit for precision analog
Maximum on-resistance is 50Ω, with channel-to-channel matching within 500mΩ. That tight matching keeps gain errors consistent across channels in a multiplexed ADC system. Charge injection is 200pC — moderate; for sub-1µV settling in high-impedance circuits, budget extra settling time or add a sample-and-hold. Off-leakage is a typical 60pA, so the part won't load down high-impedance sources.
Sourcing and lifecycle
Texas Instruments lists the TMUX8108PWR as Active. No last-time-buy or obsolescence notices are in effect.