1 Features
• Latch-up immune
• Dual supply range: ±4.5V to ±22 V
• Single supply range: 4.5V to 44 V
• –55°C to +125°C operating temperature
• Low on-resistance: 2Ω
• High current support: 220mA (maximum)
• 1.8V logic compatible
• Integrated pull-down resistor on logic pins
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional operation

2 Applications
• Avionics flight control unit
• Aircraft cockpit display
• Standalone avionics precision flight control
• Interconnect distribution box
• Aerospace and defense

3 Description
The TMUX7212M is a complementary metaloxide
semiconductor (CMOS) switch with four
independently selectable 1:1, single-pole, single-throw
(SPST) switch channels. The devices work with a
single supply (4.5V to 44 V), dual supplies (±4.5V to
±22 V), or asymmetric supplies (such as VDD = 12 V,
VSS = –5V). The TMUX7212M supports bidirectional
analog and digital signals on the source (Sx) and
drain (Dx) pins ranging from VSS to VDD.
Each switch of the TMUX7212M is controlled with
appropriate logic control inputs on the SELx pins. The
TMUX7212M is part of the precision switches and
multiplexers family of devices and have very low on
and off leakage currents allowing them to be used in
high precision measurement applications.
The TMUX7212M provides latch-up immunity,
preventing undesirable high current events between
parasitic structures within the device typically caused
by overvoltage events. A latch-up condition typically
continues until the power supply rails are turned off
and can lead to device failure. The latch-up immunity
feature allows the TMUX7212M family of switches
and multiplexers to be used in harsh environments.
Additionally, the TMUX7212M is rated for extended
temperature use down to –55°C, making it an
excellent choice for harsh industrial and aerospace
applications.