LM311DR in LM339 / LM393 Comparators Family
The LM311DR is a high-speed voltage comparator family manufactured primarily by Texas Instruments, designed to operate over a wide range of supply voltages from standard 15V op-amp rails down to single 5V logic supplies. Unlike standard comparators, the LM311 features a flexible output stage with both open-collector and open-emitter capabilities, allowing it to drive lamps, relays, or digital logic including RTL, DTL, and TTL. It is a staple in power management and signal conditioning circuits requiring fast response times.
Variants in This Sub-Family
Variants within the LM311 family primarily differ in package type, such as SOIC, PDIP, and TSSOP, and temperature grade ratings ranging from commercial to automotive (Q100). While the core electrical characteristics remain consistent, some specific manufacturer suffixes denote enhanced ESD protection or lead-free finishes. Precision variants may offer tighter input offset voltage specifications for more demanding threshold detection applications.
