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LM393: Dual Differential Comparator — Datasheet & Buying
LM393 guide: dual comparator, open-collector output, applications and sourcing.
LM393 guide: dual comparator, open-collector output, applications and sourcing.
The LM393 is a dual differential comparator with open-collector outputs. This guide explains its use and procurement.
By Vigny (深圳市华芯购电子有限公司) · Published 2026-09-27 · Data verified 2026-09-29 · Sources: manufacturer datasheets & HuaXinGou stock verification
The LM393 contains two independent comparators operating from 2V to 36V single supply. Outputs are open-collector, requiring pull-up resistors, and can drive loads or logic levels.
Voltage threshold detection, zero-crossing detection, window comparators, oscillator circuits and sensor triggering.
Add hysteresis (positive feedback) to avoid chatter near the threshold. Pull-up to the logic rail defines the output high level.
Available as LM393N (DIP), LM393DR (SOIC) from TI/ON/ST and domestic equivalents. HuaXinGou verifies stock and batch.
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