LM339DT in LM339 / LM393 Comparators Family
The LM339DT is a surface-mount quad differential comparator manufactured by STMicroelectronics and Texas Instruments, designed to operate from a single power supply over a wide voltage range. It integrates four independent voltage comparators with open-collector outputs, allowing for logic level shifting and wired-OR connections. This sub-family is widely utilized in industrial and consumer electronics for voltage monitoring, signal square-up circuits, and basic threshold detection where high-density PCB mounting is required.
Variants in This Sub-Family
Variants within the LM339 family primarily differ in their operating temperature ranges and qualification standards. While the standard LM339DT targets commercial temperatures (0C to 70C), industrial-grade versions like the LM239 and automotive-qualified versions like the LM2901 offer wider temperature envelopes and enhanced reliability. Furthermore, packaging differences between the LM339D and LM339DT refer specifically to the carrier format (tube vs. tape and reel) or specific manufacturer-defined lead-frame optimizations.
