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.