TPS3305-33DGNG4

Supervisors Overview

The TPS3305-33DGNG4 is a dual processor supervisory circuit manufactured by Texas Instruments, designed for robust system monitoring in embedded applications. It features two independent voltage monitor channels with fixed threshold voltages of 3.3 V and 5 V, ensuring accurate detection of power supply deviations. The device includes an integrated watchdog timer to prevent software lockups and provides manual reset capability for user-initiated system recovery. Operating within a supply voltage range up to 6 V, it supports active high and active low push-pull outputs. The component is housed in an 8-pin MSOP PowerPAD package, suitable for surface-mount assembly, and functions reliably across an industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Dual-channel voltage supervision with fixed thresholds for critical power rails
• Integrated watchdog timer functionality to detect and recover from software faults
• Manual reset input allowing user-controlled system restart capabilities
• Push-pull output configuration supporting both active high and active low logic levels

Supervisors Applications

• Monitoring dual power supplies in digital signal processing systems
• System supervision for microcontroller-based embedded controllers
• Watchdog timer implementation in industrial automation equipment
• Power management oversight in portable electronic devices

Supervisors Procurement Notes

Verify the complete part number including the G4 suffix to ensure compliance with RoHS standards and lead-free manufacturing requirements. Confirm that the DGNG package variant matches the required surface-mount footprint and thermal pad specifications for the target PCB layout. Cross-reference the specific threshold voltages against the application's power rail tolerances to ensure correct supervision levels are selected for the design.

Supervisors Selection Notes

Select this component when dual independent voltage monitoring is required alongside watchdog protection. The fixed 3.3 V and 5 V thresholds suit standard logic and analog supply rails. Consider the MSOP PowerPAD package for compact designs requiring efficient thermal dissipation. Ensure the manual reset feature aligns with the system's recovery strategy. Verify compatibility with the operating temperature range and output drive requirements before finalizing the schematic.

Supervisors Part Context

This device belongs to the TPS3305 family of dual processor supervisors from Texas Instruments. Similar parts include the TPS3305-18 series with different threshold configurations and the TPS3307 triple supervisor. The G4 suffix indicates environmental compliance. The DGNG package denotes an 8-pin MSOP with a exposed power pad for improved thermal performance compared to standard SOIC packages.

Supervisors Replacement Considerations

Direct substitutes include other TPS3305 variants with matching thresholds or the TPS3307 for triple channel needs. Verify pinout compatibility and threshold voltage alignment when considering cross-model replacements. Check package dimensions to ensure mechanical fit without PCB redesign.