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: 2.1 Ω
• Low charge injection: −10 pC
• High current support: 330 mA (maximum)
(VSSOP)
• High current support: 440 mA (maximum) (WSON)
• –40°C to +125°C operating temperature
• 1.8 V logic compatible
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional signal path
• Break-before-make switching

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

3 Description
The TMUX7219 is a complementary metal-oxide
semiconductor (CMOS) switch with latch-up immunity
in a single channel, 2:1 (SPDT) configuration. The
device works with a 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 TMUX7219
supports bidirectional analog and digital signals on the
source (Sx) and drain (D) pins ranging from VSS to
VDD.
The TMUX7219 can be enabled or disabled by
controlling the EN pin. When disabled, both signal
path switches are off. When enabled, the SEL pin
can be used to turn on signal path 1 (S1 to D) or
signal path 2 (S2 to D). 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.