• 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

• 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)

Simplified Diagram

The TMUX7234 is a complementary metal-oxide semiconductor (CMOS) multiplexer with latch-up 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 V_DD = 12 V, V_SS = –5 V). The TMUX7234 supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins ranging from V_SS to V_DD.

All logic control inputs support logic levels from 1.8 V to V_DD, 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.

Application Diagram