1 Features

• Latch-up immune

• Dual supply range: ±4.5V to ±22V

• Single supply range: 4.5V to 44V

• Low on-resistance: 4Ω

• Low charge injection: 3pC

• High current support: 400mA (maximum) (WQFN)

• High current support: 300mA (maximum) (TSSOP)

• –40°C to +125°C operating temperature

• 1.8V logic compatible inputs

• Integrated pull-down resistor on logic pins

• Fail-safe logic

• Rail-to-rail operation

• Bidirectional signal path

• Break-before-make switching

2 Applications

• Factory automation and control

• Programmable logic controllers (PLC)

• Analog input modules

• Semiconductor test equipment

• Battery test equipment

• Ultrasound scanners

• Patient monitoring and diagnostics

• Optical networking

• Optical test equipment

• Wired networking

• Data acquisition systems (DAQ)

3 Description

The TMUX7208 is a precision 8:1, single channel

multiplexer while the TMUX7209 is a 4:1, 2 channel

multiplexer featuring low on resistance and charge

injection. The devices work with a single supply (4.5V

to 44V), dual supplies (±4.5V to ±22V), or asymmetric

supplies (such as VDD = 12V, VSS = –5V). The

TMUX720x support bidirectional analog and digital

signals on the source (Sx) and drain (D) pins ranging

from VSS to VDD.

The TMUX720x are part of the precision switches

and multiplexers family of devices and have very

low on and off leakage currents allowing them to

be used in high precision measurement applications.

The TMUX720x 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 TMUX720x family of switches and

multiplexers to be used in harsh environments.