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: 2 Ω
• High current support: 330 mA (maximum) (WQFN)
• –40°C to +125°C operating temperature
• 1.8 V logic compatible
• Integrated pull-down resistor on logic pins
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional operation

2 Applications
• Gas meters
• Flow transmitters
• Factory automation and industrial controls
• Programmable logic controllers (PLC)
• Analog input modules
• Semiconductor test
• Data acquisition systems
• Ultrasound scanners
• Optical networking
• Optical test equipment
• Remote radio units
• Wired networking
• Patient monitoring and diagnostics

3 Description
The TMUX7236 is a complementary metal-oxide
semiconductor (CMOS) switch with latch-up immunity
in a dual channel, 2:1 configuration. The device works
well with dual supplies (±5 V to ±22 V), a single
supply (5 V to 44 V), or asymmetric supplies (such
as VDD = 12 V, VSS = –5 V). The TMUX7236 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.