1 Features

• Supply range: 1.8 to 5.5 V

• Beyond the supply signal range: -12 V to 12 V

• High current support: >1A (maximum)

• Ultra-low on-resistance: 0.13 Ω

• Low on-resistance flatness: 1.0 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

• Audio input or output switching

• Ultrasonic gas flow transmitters

• Analog input modules

• Industrial module detection

• RS485/232

3 Description

The TMUX4827 is a complementary metal-oxide

semiconductor (CMOS) multiplexer with 2 selectable

2:1, single-pole, double-throw (SPDT) switch

channels. This device works with a single supply (1.8

to 5.5 V), but can pass bidirectional analog and digital

signals beyond the supply from -12 V to 12 V.

The TMUX4827 also features bidirectional powered

off protection up to ±12 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

TMUX4827 is well suited for passing precision analog

and audio signals without adding distortion.