TPS3306-15DR

Supervisors Overview

The TPS3306-15DR is a dual-channel voltage supervisory circuit manufactured by Texas Instruments, designed for monitoring two independent power rails in embedded systems. It operates within a supply voltage range up to 6 V and features active low open-drain outputs with a fixed reset delay of 70 ms minimum. The device integrates a watchdog timer and battery backup switch functionality while lacking manual reset or chip enable inputs. Threshold voltages are set at 1.4 V and 2.93 V, ensuring precise detection of power anomalies. It functions reliably across an industrial temperature range from -40°C to +85°C and is housed in an 8-SOIC surface-mount package.

Supervisors Feature Summary

• Dual-channel supervision with dedicated thresholds for critical power rails
• Integrated watchdog timer with automatic timeout reset capability
• Battery backup switch support for seamless power source transition
• Active low open-drain output configuration for flexible interfacing

Supervisors Applications

• Dual-processor system power monitoring
• Industrial control unit voltage supervision
• Embedded system power-fail detection
• Battery-backed memory protection circuits

Supervisors Procurement Notes

Verify the specific suffix DR indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the 8-SOIC footprint matches your PCB layout requirements. Check for any recent product change notices affecting pinout or electrical characteristics. Validate that the 1.4 V and 2.93 V thresholds align with your target supply voltages.

Supervisors Selection Notes

Select this component when dual-rail supervision with watchdog functionality is required in a compact SOIC package. Compare against single-channel supervisors if only one rail needs monitoring. Consider the 70 ms reset delay against system startup timing requirements. Evaluate the absence of manual reset if user intervention is necessary. Verify operating temperature range suitability for the intended environment.

Supervisors Part Context

This part belongs to the TPS3306 series of dual-processor supervisory circuits from Texas Instruments. It shares core architecture with variants like TPS3306-33DGKG4 but differs in threshold settings and packaging. The series is designed for reliable power management in microcontroller-based applications requiring robust fault detection without external components.

Supervisors Replacement Considerations

TPS3306-15DGK is a pin-compatible alternative in VSSOP-8 packaging with identical electrical specifications. TPS3306-25QDRG4Q1 offers automotive qualification with similar dual-channel supervision in SOIC-8. Verify threshold voltage compatibility when substituting with other TPS3306 variants.