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 Automotive Operating temperature range (C) -40 to 125, -40 to 85 Features 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 Automotive Operating temperature range (C) -40 to 125, -40 to 85 Features VICR (Max) (V) 34.5 VICR (Min) (V) 0
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range (B and Q versions)
    • Device temperature grade 3: –40°C to 85°C ambient operating temperature range (I version)
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • NEW TL331B-Q1 and TL391B-Q1
  • Wide range of supply voltage, 2 V to 36 V
  • Low supply-current drain independent of supply voltage: 0.43 mA Typ (B version)
  • Low input bias current, 3.5 nA typ (B version)
  • Low input offset voltage, 0.37 mV typ (B Version)
  • Differential input voltage range equal to maximum-rated supply voltage, ±36 V
  • Input range includes ground
  • TL391B-Q1 provides an alternate pinout
  • Output compatible With TTL, MOS and CMOS
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to 125°C ambient operating temperature range (B and Q versions)
    • Device temperature grade 3: –40°C to 85°C ambient operating temperature range (I version)
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C5
  • NEW TL331B-Q1 and TL391B-Q1
  • Wide range of supply voltage, 2 V to 36 V
  • Low supply-current drain independent of supply voltage: 0.43 mA Typ (B version)
  • Low input bias current, 3.5 nA typ (B version)
  • Low input offset voltage, 0.37 mV typ (B Version)
  • Differential input voltage range equal to maximum-rated supply voltage, ±36 V
  • Input range includes ground
  • TL391B-Q1 provides an alternate pinout
  • Output compatible With TTL, MOS and CMOS

The TL331B-Q1 and TL391B-Q1 devices are the next generation versions of the industry-standard TL331-Q1 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, dedicated ESD protection cells with improved negative input voltage handling. The TL331B-Q1 can drop-in replace both the TL331-Q1 "I" and "Q" versions. The TL391B-Q1 provides an alternate pinout of the TL331B-Q1.

This device consists of a single voltage comparator designed to operate from a single power supply over a wide range of voltages. Operation from dual supplies also is possible if the difference between the two supplies is 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. To achieve wired-AND relationships, one can connect the output to other open-collector outputs.

The TL331B-Q1 and TL391B-Q1 devices are the next generation versions of the industry-standard TL331-Q1 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, dedicated ESD protection cells with improved negative input voltage handling. The TL331B-Q1 can drop-in replace both the TL331-Q1 "I" and "Q" versions. The TL391B-Q1 provides an alternate pinout of the TL331B-Q1.

This device consists of a single voltage comparator designed to operate from a single power supply over a wide range of voltages. Operation from dual supplies also is possible if the difference between the two supplies is 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. To achieve wired-AND relationships, one can connect the output to other open-collector outputs.

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Technical documentation

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Type Title Date
* Data sheet TL331B-Q1, TL391B-Q1 and TL331-Q1 Automotive Single Comparators datasheet (Rev. F) 13 Jan 2021
Functional safety information TL331-Q1 Functional Safety FIT Rate and Failure Mode Distribution 10 Jan 2020
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article A complete low-voltage backup battery solution for eCall systems 05 Mar 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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 tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
Reference designs

PMP9768 — Automotive eCall Power Supply Reference Design with High Intermediate Voltage

This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not (...)
Reference designs

PMP9769 — Automotive eCall Power Supply Reference Design with Low Intermediate Voltage

This reference design includes a complete power management solution for a standalone emergency call (eCall) system in an automotive environment. The circuit is supplied directly from the car battery rail. It also manages a backup battery to power the eCall system while the car battery rail is not (...)
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SOT-23 (DBV) 5 View options

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