1 Features

• Supply range: 1.8 V to 5.5 V

• Beyond the supply signal range: -5.5 V to 5.5 V

• High current support: >1A (maximum)

• Ultra-low on-resistance: 0.2 Ω

• Low on-resistance flatness: 1 mΩ

• Low THD+N: 0.001 (-100 dB)

• –40°C to +125°C operating temperature

• Powered off protection

• Over temperature protection

• 1.8 V logic compatible

• Fail-safe logic

• Break-before-make switching

2 Applications

• Land mobile radios

• Defense radios

• Ultrasonic gas flow transmitters

• Smart drug delivery

• Analog input modules

• Industrial module detection

• RS485/232

3 Description

The TMUX2889 is a complementary metal-oxide

semiconductor (CMOS) multiplexer with two

independently selectable 2:1, single-pole, doublethrow

(SPDT) switch channels. This device works

with a single supply (1.6 V to 5.5 V), but can pass

bidirectional analog and digital signals beyond the

supply from -5.5 V to 5.5 V.

The TMUX2889 also features powered off protection

up to ±5.5 V, which isolates the switch even when

there is no supply voltage present (VDD = 0 V).

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 1 mΩ RON-flatness, the

TMUX2889 is designed for passing precision analog

and audio signals without adding distortion.