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
• –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
• Optical networking
• Optical test equipment
• HVAC controller
• Ultrasound scanners
• Active oscilloscope probes
• Factory automation and industrial controls
• Programmable logic controllers (PLC)
• Analog input modules
• Semiconductor test
• Patient monitoring and diagnostics
• Wired networking
• Data acquisition systems

3 Description
The TMUX722x are complementary metal-oxide
semiconductor (CMOS) switches with latch-up
immunity in a dual channel, 1:1 (SPST) configuration.
These devices work 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
TMUX722x supports bidirectional analog and digital
signals on the source (Sx) and drain (D) pins ranging
from VSS to VDD.
The TMUX722x can be enabled or disabled by
controlling the SEL pins, turning on signal path 1
(S1 to D1) or signal path 2 (S2 to D2). All logic
control inputs support logic levels from 1.8 V to VDD,
allowing for both TTL and CMOS logic compatibility
when operating in the valid supply voltage range. Failsafe
logic circuitry allows voltages on the control pins
to be applied before the supply pin, protecting the
device from potential damage. For more information,
see Section 8.3.5.
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.