TS3121ILT

Overview

The TS3121ILT 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 activation. The component is AEC-Q100 qualified for automotive applications and offers high ESD tolerance.

Feature Summary

• Rail-to-rail input capability with open-drain output stage
• High-speed response with low power consumption
• Guaranteed start-up time for reliable operation
• Extended temperature range suitable for industrial and automotive environments

Applications

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

Procurement Notes

Verify the specific suffix 'ILT' against official documentation to confirm package type and reel specifications. Ensure compatibility with required operating temperatures and voltage levels. Confirm AEC-Q100 qualification status if used in automotive contexts. Check for functional safety documentation availability if required by system design standards.

Selection Notes

Select this comparator for applications requiring fast response times and low power usage. Consider the rail-to-rail input feature for wide signal range compatibility. The open-drain output allows flexibility in pull-up voltage selection. Evaluate the guaranteed start-up time for systems with switched power supplies. Verify package suitability for space-constrained PCB designs.

Part Context

The TS3121 series includes variants like TS3121, TS3121A, and TS3121P. The TS3121P version adds an embedded Power-on Reset circuit. Other series members may differ in offset voltage grades or reset features. This component belongs to a family designed for high-speed, low-power comparison tasks in demanding environments.

Replacement Considerations

TS880: For lower supply current requirements. TS3011: For higher speed performance needs. TS3021: For push-pull output configurations.