LM311H in LM339 / LM393 Comparators Family
The LM311H is a high-performance voltage comparator family originally designed by National Semiconductor and now produced by Texas Instruments. Packaged primarily in the TO-92 and TO-99 metal cans, this sub-family provides a versatile output stage capable of driving lamps, relays, or digital logic. It stands out in the broader LM311 lineage for its ability to operate from a single 5V supply or dual +/-15V rails, offering engineers a robust solution for precision voltage level detection and signal conditioning in demanding environments.
Variants in This Sub-Family
Differences within the LM311H sub-family primarily revolve around packaging standards and military grade certifications. While the internal silicon remains consistent across the high-performance H-series, individual part numbers like the LM311H/NOPB indicate lead-free compliance. Some variants may offer tighter offset voltage specifications or extended temperature ranges, such as the LM111 military-grade versions, which are functionally identical but tested to more rigorous environmental standards than the commercial or industrial LM311 units.
