TMUX7348F-EP

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 TMUX7348F-EP to be used in front end data acquisition applications where high performance and high robustness are both critical.