TPS3305-33DR

Supervisors Overview

The TPS3305-33DR is a dual processor voltage supervisory circuit manufactured by Texas Instruments. It monitors two input voltages with fixed thresholds of 3.3 V and 5 V. The device features active high and active low push-pull outputs, manual reset capability, and a watchdog timer. It operates within a supply voltage range of up to 6 V and supports an operating temperature range from -40°C to +85°C. Packaged in an SOIC-8 surface-mount case, it includes a reset delay time of 200 ms.

Supervisors Feature Summary

• Dual-channel voltage supervision with independent threshold monitoring
• Configurable output polarity supporting both active high and active low signals
• Integrated manual reset button interface for system control
• Built-in watchdog timer functionality for fault detection

Supervisors Applications

• Dual power rail monitoring in embedded systems
• Processor reset generation in multi-voltage logic circuits
• Watchdog supervision for industrial control units

Supervisors Procurement Notes

Verify the specific suffix DR indicates tape-and-reel packaging configuration. Confirm the -33 designation corresponds to the 3.3 V and 5 V threshold settings. Ensure compatibility with SOIC-8 footprint requirements during PCB layout. Check RoHS compliance status against current regulatory standards before finalizing procurement orders.

Supervisors Selection Notes

Select this component when dual voltage monitoring with distinct thresholds is required. The fixed 3.3 V and 5 V thresholds suit standard logic families. Consider the push-pull output drive strength for direct microcontroller interfacing. Evaluate the 200 ms reset delay against system startup timing requirements to ensure proper initialization sequences.

Supervisors Part Context

Part of the TPS330x series of multi-supervisor ICs designed for complex power management applications. This family provides integrated solutions for reset generation, watchdog functions, and battery backup switching. The TPS3305 variant specifically addresses dual-rail monitoring needs common in mixed-signal designs.

Supervisors Replacement Considerations

Check TPS3305-18DR for alternative threshold configurations. Verify TPS3307-33DR if triple channel monitoring is needed instead of dual channels. Ensure pinout compatibility before substituting with other TI supervisor ICs.