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Drop-in replacement with upgraded functionality to the compared device.
LM393B ACTIVE Dual commercial grade standard comparator Pin-to-pin upgrade with increased performance with a wider voltage range.

Product details

Number of channels (#) 2 Output type Open-collector Propagation delay time (µs) 1.3 Vs (Max) (V) 36 Vs (Min) (V) 2 Vos (offset voltage @ 25 C) (Max) (mV) 5 Iq per channel (Typ) (mA) 0.4 Input bias current (+/-) (Max) (nA) 50 Rail-to-rail Out Rating Catalog Operating temperature range (C) -25 to 85 Features Standard comparator VICR (Max) (V) 34.5 VICR (Min) (V) 0
Number of channels (#) 2 Output type Open-collector Propagation delay time (µs) 1.3 Vs (Max) (V) 36 Vs (Min) (V) 2 Vos (offset voltage @ 25 C) (Max) (mV) 5 Iq per channel (Typ) (mA) 0.4 Input bias current (+/-) (Max) (nA) 50 Rail-to-rail Out Rating Catalog Operating temperature range (C) -25 to 85 Features Standard comparator VICR (Max) (V) 34.5 VICR (Min) (V) 0
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 4.9 x 3.9 SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • NEW LM393B and LM2903B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 200 µA per comparator
    • Faster response time of 1 µsec
    • Extended temperature range for LM393B
    • Available in tiny 2 x 2mm WSON package
  • B-version is drop-in replacement for LM293, LM393 and LM2903, A and V versions
  • Common-mode input voltage range includes ground
  • Differential input voltage range equal to maximum-rated supply voltage: ±38 V
  • Low output saturation voltage
  • Output compatible with TTL, MOS, and CMOS
  • NEW LM393B and LM2903B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 200 µA per comparator
    • Faster response time of 1 µsec
    • Extended temperature range for LM393B
    • Available in tiny 2 x 2mm WSON package
  • B-version is drop-in replacement for LM293, LM393 and LM2903, A and V versions
  • Common-mode input voltage range includes ground
  • Differential input voltage range equal to maximum-rated supply voltage: ±38 V
  • Low output saturation voltage
  • Output compatible with TTL, MOS, and CMOS

The LM393B and LM2903B devices are the next generation versions of the industry-standard LM393 and LM2903 comparator family. These next generation B-version comparators feature lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, and improved 2 kV ESD performance and input ruggedness through dedicated ESD clamps. The LM393B and LM2903B can drop-in replace the LM293, LM393 and LM2903, for both "A" and "V" grades.

All devices consist of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Quiescent current is independent of the supply voltage.

The LM393B and LM2903B devices are the next generation versions of the industry-standard LM393 and LM2903 comparator family. These next generation B-version comparators feature lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, and improved 2 kV ESD performance and input ruggedness through dedicated ESD clamps. The LM393B and LM2903B can drop-in replace the LM293, LM393 and LM2903, for both "A" and "V" grades.

All devices consist of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages. Quiescent current is independent of the supply voltage.

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Technical documentation

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Type Title Date
* Data sheet LM393B, LM2903B, LM193, LM293, LM393 and LM2903 Dual Comparators datasheet (Rev. AE) 07 Oct 2020
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017

Design & development

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PDIP (P) 8 View options
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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