TMUX7202RQXR

Overview

The TMUX7202RQXR is a single-channel, 1:1 (SPST) precision analog switch manufactured by Texas Instruments. It operates with a single supply voltage ranging from 4.5V to 44V or dual supplies from ±4.5V to ±22V. The device features latch-up immunity and supports bidirectional analog and digital signals on the source and drain pins. Key electrical parameters include a maximum on-resistance of 1.2Ω at 25°C, low charge injection of -10pC, and an operating temperature range from -40°C to +125°C. It utilizes active-high logic control via the SEL pin and is housed in an 8-pin WQFN package.

Feature Summary

• Latch-up immune design prevents high current events caused by overvoltage conditions
• Supports rail-to-rail operation for both analog and digital signal paths
• Integrated fail-safe logic allows control voltages to be applied before power rails
• Compatible with 1.8V logic thresholds across the valid supply voltage range

Applications

• Optical networking equipment
• Factory automation and industrial controls
• Programmable logic controllers (PLC)
• Semiconductor test systems
• Patient monitoring and diagnostics

Procurement Notes

Verify the specific ordering suffix RQX corresponds to the WQFN-8 package configuration required for your PCB layout. Confirm that the active-high logic selection matches your system control requirements, as the TMUX7201 variant utilizes active-low logic. Ensure the component meets RoHS compliance standards applicable to your manufacturing region.

Selection Notes

Select this component when a single-pole single-throw switch with high voltage tolerance up to 44V is required. The active-high SEL pin distinguishes it from the TMUX7201. Consider the thermal resistance characteristics of the WQFN package if operating near the upper limits of the specified temperature range or continuous current ratings.

Part Context

This part belongs to the TMUX720x family of CMOS switches designed for harsh environments. The family shares common features such as latch-up immunity and wide supply voltage ranges. The TMUX7202 specifically provides the active-high logic option within this series, offering flexibility in system design compared to its active-low counterpart.

Replacement Considerations

The TMUX7201RQXR serves as a direct functional substitute if the system logic can accommodate active-low control inputs. Verify that any replacement maintains the same WQFN-8 package dimensions and pinout compatibility to ensure seamless integration without board redesign.

FAQ

What is the function of the NC pins on the TMUX7202RQXR?

Pins 2 and 5 are designated as No Connection (NC). They are not internally connected and should remain unconnected during PCB assembly.

How does the fail-safe logic protect the device?

The fail-safe logic circuitry allows voltages to be applied to the control pins before the power supply pins are energized, protecting the device from potential damage during power-up sequences.

Can the TMUX7202RQXR handle asymmetric supply voltages?

Yes, the device supports asymmetric supplies, such as VDD = 12V and VSS = –5V, provided the differential voltage remains within the specified operating range.