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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.