TMUX7309FRRPR

TMUX7308F and TMUX7309F are precision CMOS analog multiplexers offering 8:1 (single-ended) and 4:1 (differential) configurations. These devices operate from dual supplies (±5V to ±22V), single supplies (8V to 44V), or asymmetric supplies (e.g., VDD = 12V, VSS = −5V). The TMUX7308F and TMUX7309F provide overvoltage protection during both power-on and power-off conditions, making them suitable for applications where supply sequencing cannot be precisely controlled. During power-on and power-off conditions, the devices block fault voltages up to +60V or −60V with respect to ground. Regardless of switch input conditions and logic control states, the switch channels remain off in the absence of supply power. Under normal operating conditions, if the analog input signal level on any Sx pin exceeds the supply voltage (VDD or VSS) by one threshold voltage (VT), the channel turns off and the Sx pin enters a high-impedance state. When a faulted channel is selected, the drain pin (D or Dx) is pulled to the exceeded supply rail (VDD or VSS). The TMUX7308F and TMUX7309F feature low capacitance, low charge injection, and integrated fault protection, making them well suited for front-end data acquisition applications where both high performance and high robustness are required. These devices are available in a standard TSSOP package and a smaller WQFN package ideal for space-constrained PCB designs.

Applications

• Factory automation and control
• Programmable Logic Controllers (PLC)
• Analog input modules
• Semiconductor test equipment
• Battery test equipment
• Servo drive control modules
• Data acquisition systems (DAQ)

Key features

• Wide supply voltage range: Dual supply: ±5V to ±22V; Single supply: 8V to 44V
• Integrated fault protection:
• Overvoltage protection (source to supply or to drain): ±85V
• Overvoltage protection: ±60V
• Power-off protection: ±60V
• Fault-free channel continues operation in known state
• No logic input indication
• Under overvoltage conditions, output is clamped to supply
• Latch-up immunity
• Supports 1.8V logic levels
• Fail-safe logic: up to 44V (supply independent)
• Integrated pull-down resistors on logic pins
• Break-before-make switching
• Industry-standard TSSOP and smaller WQFN packages