TSM971ESA+T

Overview

The TSM971ESA+T is a single-channel ultra-low-power analog comparator in an 8-pin SOIC package. It operates on single supplies from +2.5V to +11V or dual supplies of ±1.25V to ±5.5V, drawing a maximum quiescent current of 4μA over the -40°C to +85°C temperature range. The device features an internal 1.182V reference with ±1% accuracy and open-drain outputs capable of sinking up to 40mA. Propagation delay is 12μs at 10mV overdrive.

Feature Summary

• Ultra-low power consumption with maximum supply current of 4μA across the industrial temperature range
• Integrated 1.182V voltage reference with ±1% accuracy for simplified threshold detection
• Open-drain output stages enabling wired-OR configurations and level-shifting applications
• Adjustable external hysteresis capability via dedicated HYST pin to prevent oscillation

Applications

• Threshold detectors and window comparators
• Battery-powered systems requiring minimal standby current
• Level translators for signal interface between different logic families

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified suppliers. Confirm the specific suffix matches the required tape-and-reel packaging format. Ensure the ordering part number aligns with the intended industrial temperature grade and package variant before finalizing procurement orders.

Selection Notes

Select this component for designs prioritizing low quiescent current and integrated reference functionality. Verify that the open-drain output configuration meets the system's pull-up requirements. Ensure the input common-mode voltage range accommodates the application's signal levels relative to the negative supply rail.

Part Context

This device belongs to the TSM97x family of micropower analog comparators. It serves as an alternate source for the Maxim MAX971 series, maintaining electrical and form-factor compatibility. The family includes single, dual, and quad variants designed for low-voltage single-supply operations.

Replacement Considerations

• MAX971ESA+

FAQ

How is adjustable hysteresis implemented on the TSM971?

Hysteresis is generated using two external resistors connected to the HYST pin. Connecting HYST to REF disables hysteresis, while applying a voltage between REF and REF-50mV creates a programmable hysteresis band.

What is the function of the GND pin on the TSM971?

The GND pin allows the output stage to sink current to ground rather than the negative supply rail (V-). For single-supply operation, this pin must be tied to V-.