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.