1 Features
• VID V62/24625
• Supports defense, aerospace, and medical
applications
– Controlled baseline
– One fabrication, assembly, and test site
– Military temperature range: -55°C to 125°C TA
– Extended product life cycle
• Wide supply range:
– Dual supply: ±5V to ±22V
– Single supply: 8V to 44V
• Integrated fault protection:
– Overvoltage protection, source to supplies or
source to drain: ±85V
– Overvoltage protection: ±60V
– Power-off protection: ±60V
– Adjustable overvoltage triggering thresholds
• VFP: 3V toVDD, VFN: 0V to VSS
– Interrupt flags to indicate overall and specific
fault channel information
– Non-fault channels continue to operate with low
leakage currents
• Latch-up immunity by device construction
• 1.8V Logic capable
• Fail-safe logic: up to 44V independent of supply
• Break-before-make switching
• Industry-standard TSSOP package

2 Applications
• Aircraft cockpit display
• Flight control unit
• Radar
• Sonar
• Electronic warfare
• Seeker front end

3 Description
The TMUX7348F-EP is a modern complementary
metal-oxide semiconductor (CMOS) analog
multiplexer in an 8:1 (single ended) configuration. This
device works well with dual supplies (±5V to ±22V),
a single supply (8V to 44V), or asymmetric supplies
(such as VDD = 12V, VSS = –5V). The overvoltage
protection is available in powered and powered-off
conditions, making the TMUX7348F-EP suitable for
applications where power supply sequencing cannot
be precisely controlled.
This device blocks fault voltages up to +60V and
–60V relative to ground in both powered and
powered-off conditions. When no power supplies are
present, the switch channels remain in the OFF
state regardless of switch input conditions and logic
control status. Under normal operation conditions, if
the analog input signal level on any Sx pin exceeds
positive fault supply (VFP) or negative fault supply
(VFN) by a threshold voltage (VT), the channel turns
OFF and the Sx pin becomes high impedance. When
the fault channel is selected, the drain pin (D or Dx)
is pulled to the fault supply voltage (VFP or VFN) that
was exceeded. The devices provide two active-low
interrupt flags (FF and SF) to provide details of the
fault. The FF flag indicates if any of the source inputs
are experiencing a fault condition, while the SF flag is
used to decode which specific inputs are experiencing
a fault condition.
The low capacitance, low charge injection, and
integrated fault protection enables the TMUX7348FEP
to be used in front end data acquisition
applications where high performance and high
robustness are both critical.