TS3121IYLT

Overview

The TS3121IYLT 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 guaranteed start-up time for stable output conditions upon power activation. The component is AEC-Q100 qualified and offers high ESD tolerance of 4 kV HBM.

Feature Summary

• Rail-to-rail input capability with open-drain output stage
• Embedded fail-safe architecture allowing operation with biased I/O pins while VCC is zero
• Guaranteed start-up time ensuring known output state after power activation
• High robustness with 4 kV HBM ESD tolerance

Applications

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

Procurement Notes

Verify the specific ordering suffix 'YL' corresponds to the SOT-23-5 package and cut tape delivery format as defined in the official datasheet. Confirm that the 'I' designation indicates the industrial temperature grade (-40 °C to +125 °C). Ensure compatibility with system requirements for open-drain outputs and pull-up resistor configurations.

Selection Notes

Select this component for designs requiring high-speed response combined with low power consumption. It is suitable for space-constrained PCB layouts due to its compact package. Consider the guaranteed start-up time for applications involving switched power supplies. Verify if the open-drain output interface aligns with the downstream logic levels required by the system.

Part Context

This part belongs to the TS3121 series of single comparators manufactured by STMicroelectronics. The series includes variants such as TS3121, TS3121A, and TS3121P, which share similar electrical characteristics but may differ in offset voltage grades or the inclusion of embedded Power-on Reset circuits. The TS3121IYLT specifically denotes the industrial grade version in a small outline package.

Replacement Considerations

TS880: Offers lower supply current. TS3011: Provides higher speed performance. TS3021: Features push-pull output instead of open-drain.