Texas Instruments LMx39/LM2901/LM2901-Q1 Differential Comparators

Texas Instruments LMx39/LM2901/LM2901-Q1 Quad Differential Comparators consist of four independent voltage comparators designed to operate from a single power supply over a wide range of voltages. The LM339B/LM2901B/LM2901B-Q1 devices are the next-generation versions of the industry-standard LM339 and LM2901 comparator family. These next-generation B-version comparators feature lower offset voltage, higher supply voltage capability, and lower supply current. These devices also have lower input bias current, lower propagation delay, improved 2kV ESD performance, and input ruggedness through dedicated ESD clamps. The Texas Instruments LM339B/LM2901B/LM2901-Q1 can drop in to replace the LM239, LM339, and LM2901/LM2901-Q1 for both "A" and "V" grades.


  • LM339B/LM2901BLM2901B-Q1
    • Improved specifications of B-version
      • Maximum rating: up to 38V
      • 2kV ESD rating (HBM)
      • 0.37mV low input offset
      • 3.5nA low input bias current
      • 200µA per comparator low supply-current
      • Faster response time of 1µsec
      • Extended temperature range for LM339B
  • B-version is drop-in replacement for LM239, LM339 and LM2901, A and V versions
  • Common-mode input voltage range includes ground
  • ±38V differential input voltage range equal to maximum-rated supply voltage
  • A low output saturation voltage
  • Output compatible with TTL, MOS, and CMOS
  • For a single version, see the TL331B
  • For the dual version, see the LM393B or LM2903B


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Functional Block Diagram

Block Diagram - Texas Instruments LMx39/LM2901/LM2901-Q1 Differential Comparators
Published: 2023-02-27 | Updated: 2023-05-10