1 Features
• Latch-up immune
• Dual supply range: ±4.5 V to ±22 V
• Single supply range: 4.5 V to 44 V
• Low on-resistance: 3 Ω
• Low charge injection: 3 pC
• High current support: 400 mA (maximum)
• –40°C to +125°C operating temperature
• 1.8 V logic compatible inputs
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional signal path
• Break-before-make switching

2 Applications
• Factory automation and control
• Flow transmitters
• Programmable logic controllers (PLC)
• Analog input modules
• Data acquisition systems (DAQ)
• Semiconductor test equipment
• Battery test equipment
• Ultrasound scanners
• Patient monitoring and diagnostics
• Optical networking
• Optical test equipment
• Wired networking
• Remote radio units (RRU)
• Active antenna system mMIMO (AAS)

3 Description
The TMUX7234 is a complementary metal-oxide
semiconductor (CMOS) multiplexer with latchup
immunity. The TMUX7234 contains four
independently controlled SPDT switches with an EN
pin to enable or disable all four channels. The device
supports single supply (4.5 V to 44 V), dual supplies
(±4.5 V to ±22 V), or asymmetric supplies (such as
VDD = 12 V, VSS = –5 V). The TMUX7234 supports
bidirectional analog and digital signals on the source
(Sx) and drain (D) pins ranging from VSS to VDD.
All logic control inputs support logic levels from
1.8 V to VDD, ensuring both TTL and CMOS
logic compatibility when operating in the valid
supply voltage range. Fail-Safe Logic circuitry allows
voltages on the control pins to be applied before
the supply pin, protecting the device from potential
damage.
The TMUX72xx family 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 TMUX72xx family of switches and
multiplexers to be used in harsh environments.