The TMUX28xx is a complementary metal-oxide semiconductor (CMOS) multiplexer with 2 configurations available: 1:1, single-pole, single-throw (SPST) 2-channel (TMUX2821) and 2:1, single-pole, double-throw (SPDT) 1-channel (TMUX2819). This device works with a single supply (1.8V to 5.5V), but can pass bidirectional analog and digital signals beyond the supply from -5.5V to 5.5V.
The TMUX28xx also features bidirectional powered off protection up to ±5.5V, which isolates the switch even when there is no supply voltage present (VDD = 0V). Without this protection feature, any voltage on the switch can back-power the supply rail through an internal ESD diode and cause potential damage to the rest of the system.
With 0.001% THD+N and 1mΩ RON-flatness, the TMUX28xx is an excellent choice for passing precision analog and audio signals without adding distortion.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | TMUX28xx ±5.5V Beyond the Supply, 1:1 2-Channel, 2:1 1-Channel, Power-Off Protection Switch, with 0.16Ω Ron, 1.2V and 1.8V Compatible Logic datasheet | PDF | HTML | 19 Dec 2025 |
| Application note | Low Ron Multiplexers in PLC Applications | PDF | HTML | 01 Oct 2025 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (DSG) | 8 | Ultra Librarian |
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