TSM917ESA+T

Overview

The TSM917ESA+T is a nanopower analog comparator manufactured by Touchstone Semiconductor, available in an 8-pin SOIC package. It operates from a single supply voltage ranging from 1.8V to 5.5V with a typical supply current of 750nA at 1.6V. The device features an internal 1.245V ±1.5% reference voltage and includes 4mV of internal hysteresis. Input voltages extend 200mV beyond the supply rails without phase reversal. The push-pull output stage provides rail-to-rail swings and can drive loads up to 8mA. Propagation delays are specified as 17µs (high-to-low) and 30µs (low-to-high) at 1.8V.

Feature Summary

• Guaranteed operation down to +1.8V with ultra-low supply current consumption
• Robust input stage tolerates voltages 200mV outside-the-rails without phase reversal
• Integrated 1.245V ±1.5% voltage reference with 4mV internal hysteresis for clean switching
• Push-pull output drivers designed for crowbar-current-free switching and rail-to-rail swing

Applications

• 2-Cell Battery Monitoring/Management
• Medical Instruments
• Threshold Detectors/Discriminators
• Sensing at Ground or Supply Line
• Ultra-Low-Power Systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required packaging format. Check for recent product change notifications regarding manufacturing origin or pinout updates. Ensure compliance with RoHS directives and lead-free packaging standards. Validate that the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component for applications requiring minimal quiescent current and operation at low supply voltages. The integrated reference eliminates the need for external voltage sources, reducing board space. Consider the 8-pin SOIC package for surface-mount assembly requirements. Evaluate the propagation delay specifications against system timing constraints. Verify that the input voltage range covers the expected signal levels relative to the supply rails.

Part Context

This part belongs to the TSM91x series of nanopower comparators. It serves as a second-source equivalent to the MAX917, sharing identical electrical characteristics and form factors. The series is designed for battery-operated systems where power efficiency is critical. Other variants in the family may offer different pin counts or package options while maintaining similar performance profiles.

Replacement Considerations

The MAX917 is the primary electrically equivalent counterpart. Verify pin compatibility and package dimensions before substitution. Ensure the replacement part meets the same operating temperature range and supply voltage specifications.