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.