Product details

Number of channels (#) 1 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) 250 Rail-to-rail Out Rating Catalog Operating temperature range (C) -40 to 85, -40 to 105 Features Standard comparator VICR (Max) (V) 34.5 VICR (Min) (V) 0
Number of channels (#) 1 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) 250 Rail-to-rail Out Rating Catalog Operating temperature range (C) -40 to 85, -40 to 105 Features Standard comparator VICR (Max) (V) 34.5 VICR (Min) (V) 0
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • NEW TL331B and TL391B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Improved reverse voltage performance
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 430 µA
    • Faster response time of 1 µsec
    • TL391B provides an alternate pinout
  • TL331B is improved drop-in replacement for TL331
  • 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 TL331B and TL391B
  • Improved specifications of B-version
    • Maximum rating: up to 38 V
    • ESD rating (HBM): 2k V
    • Improved reverse voltage performance
    • Low input offset: 0.37 mV
    • Low input bias current: 3.5 nA
    • Low supply-current: 430 µA
    • Faster response time of 1 µsec
    • TL391B provides an alternate pinout
  • TL331B is improved drop-in replacement for TL331
  • 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 TL331B and TL391B devices are the next generation versions of the industry-standard TL331 comparator. These next generation devices provide outstanding value for cost-sensitive applications, with features including lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, wider temperature range and improved 2kV ESD performance with drop-in replacement convenience. The TL331B is a drop-in improved replacement for both the TL331I and TL331K versions, while the TL391B provides an alternate pinout of the TL331B to replace competitive devices.

Operation from dual supplies also is possible as long as the difference between the two supplies is within 2 V to 36 V, and VCC is at least 1.5 V more positive than the input common-mode voltage. Current drain is independent of the supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships.

The TL331B and TL391B devices are the next generation versions of the industry-standard TL331 comparator. These next generation devices provide outstanding value for cost-sensitive applications, with features including lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, wider temperature range and improved 2kV ESD performance with drop-in replacement convenience. The TL331B is a drop-in improved replacement for both the TL331I and TL331K versions, while the TL391B provides an alternate pinout of the TL331B to replace competitive devices.

Operation from dual supplies also is possible as long as the difference between the two supplies is within 2 V to 36 V, and VCC is at least 1.5 V more positive than the input common-mode voltage. Current drain is independent of the supply voltage. The outputs can be connected to other open-collector outputs to achieve wired-AND relationships.

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Technical documentation

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Type Title Date
* Data sheet TL331B, TL391B and TL331 Single Comparators datasheet (Rev. J) 11 Nov 2020
Application note Application Design Guidelines for LM339, LM393, TL331 Family Comparators (Rev. B) 17 Aug 2021
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article Make your power bank more reliable with output short-circuit protection 06 Dec 2016

Design & development

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Simulation model

TL331 PSpice Model (Rev. E)

SLVM937E.ZIP (44 KB) - PSpice Model
Simulation model

TL331 TINA-TI Reference Design (Rev. A)

SLVMCS2A.ZIP (9 KB) - TINA-TI Reference Design
Simulation model

TL331 TINA-TI Spice Model (Rev. A)

SLVMCS3A.ZIP (11 KB) - TINA-TI Spice Model
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TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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