TS3121IYCT

Overview

The TS3121IYCT is a single rail-to-rail, open-drain comparator from STMicroelectronics. It operates within a supply voltage range of 1.7 V to 5.5 V and supports an extended temperature range from -40 °C to +125 °C. The device features a typical propagation delay of 60 ns and low power consumption of 70 μA. It includes embedded fail-safe input/output capabilities and guarantees a start-up time of 15 μs. The component is AEC-Q100 qualified for automotive applications.

Feature Summary

• Rail-to-rail input capability with open-drain output stage
• Embedded fail-safe architecture allowing operation when supply is zero
• Guaranteed start-up time ensuring stable output conditions upon activation
• High ESD tolerance of 4 kV HBM

Applications

• Industrial systems
• Automotive electronics
• Power tools
• Overcurrent protection circuits
• Controllers and sensors

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Ensure compatibility with required operating temperatures and electrical parameters before integration. Confirm that the selected variant meets all necessary qualification standards for the target application environment.

Selection Notes

Select this component for designs requiring high-speed response combined with low power consumption in space-constrained environments. Consider the guaranteed start-up time for applications involving switched power supplies. Evaluate the open-drain output requirements and ensure appropriate pull-up circuitry is implemented for the desired logic levels.

Part Context

This part belongs to the TS3121 series of single comparators designed for industrial and automotive use. The series includes variants such as TS3121A and TS3121P, which offer different features like lower offset voltage or integrated power-on reset. The TS3121IYCT specifically denotes the standard version with fail-safe inputs in a compact SC-70-5 package.

Replacement Considerations

TS880 offers lower supply current. TS3011 provides higher speed performance. TS3021 features push-pull output instead of open-drain.