Quad-Differential-Comparator-LM339-TI

These devices consist of four independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Operation from dual supplies also is possible, as long as the difference between the two supplies is 2 V to 36 V, and V_CC is at least 1.5 V more positive than the input common-mode voltage.

Quad General Purpose Differential Comparator - LM339

An application from an old TI datasheet showing the versatility of this comparator. For me it was a workhorse and like LM324 was used in many products.

 
Current drain is independent of the supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships.

Differential to TTL convertor using LM339

• Single Supply or Dual Supplies
• Wide Range of Supply Voltage:
• Low Supply-Current Drain Independent of Supply Voltage... 0.8 mA Typ
• Low Input Bias Current ...25 nA Typ
• Low Input Offset Voltage . . . 2 mV Typ
• Common-Mode Input Voltage Range Includes Ground
• Differential Input Voltage Range Equal to Maximum-Rated Supply Voltage . . . ±36 V
• Low Output Saturation Voltage
• Output Compatible With TTL, MOS, and CMOS