AS1975-T

Overview

The AS1975-T is a low-voltage quad comparator manufactured by ams-OSRAM USA INC. It operates with single supplies from 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V, consuming as little as 8.5µA per comparator. The device features an open-drain output capable of being pulled beyond VCC up to 5.5V > VEE. Key electrical parameters include a typical propagation delay of 300ns, internal hysteresis of 3mV, and a common-mode input voltage range extending 250mV above the rails. It is housed in a 14-pin TSSOP package.

Feature Summary

• Open-drain output stage allows voltage extension beyond VCC for logic-level translation
• Internal hysteresis ensures clean switching without external components
• Common-mode input range extends 250mV beyond supply rails
• Rail-to-rail output swing capability with loads up to 8mA

Applications

• Battery-powered systems
• Zero-crossing detectors
• Window comparators
• Logic-level translators
• Threshold detectors and discriminators

Procurement Notes

Verify the specific ordering suffix '-T' corresponds to the tape and reel delivery form required for your assembly line. Confirm that the 14-pin TSSOP package dimensions align with your PCB footprint design. Ensure the open-drain output configuration meets your circuit's pull-up requirements. Check current availability status as component lifecycles may change.

Selection Notes

Select this model when a quad comparator configuration is needed within space-limited applications. The open-drain output is suitable for interfacing with different logic voltage levels. Consider the low quiescent current for battery-operated designs. Verify that the 300ns propagation delay meets the timing requirements of your signal processing application.

Part Context

This component belongs to the AS1970-AS1975 series of low-voltage comparators. The series includes single, dual, and quad variants with either push-pull or open-drain outputs. The AS1975 specifically provides four independent comparators in a compact surface-mount package, designed for general-purpose threshold detection and signal conditioning in portable electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.