1 Features
• Dual supply range: ±4.5 V to ±22 V
• Single supply range: 4.5 V to 44 V
• –55°C to +125°C operating temperature
• Low on-resistance: 2.1 Ω
• Low charge injection: -10 pC
• High current support: 330 mA (maximum)
• Latch-up immune
• 1.8 V logic compatible
• Integrated pull-up and pull-down resistor on logic
pins
• Fail-safe logic
• Rail-to-rail operation
• Bidirectional signal path
• Break-before-make switching

2 Applications
• Avionics flight control unit
• Aircraft cockpit display
• Standalone avionics precision flight control
• Interconnect and distribution box
• Aerospace and defense

3 Description
The TMUX7219M 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 TMUX7219M
supports bidirectional analog and digital signals on the
source (Sx) and drain (D) pins ranging from VSS to
VDD.
The TMUX7219M 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.
Additionally, the TMUX7219M is rated for extended
temperature use down to –55°C, making it ideal for
harsh industrial and aerospace applications.