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  • This device consists of a low-power voltage comparator designed specifically to operate from a single supply over a wide range of voltages. Operation from split power supplies is also possible.

    This comparator also has a unique characteristic in that the input common-mode voltage range includes ground, even though operated from a single power supply voltage.

    Key Features

    • Wide single supply voltage range or dual supplies 2 V to 36 V or ± 1 V to ± 18 V
    • Very low supply current (0.2 mA) independent of supply voltage (1 mW/comparator at 5 V)
    • Low input bias current: 25 nA typ.
    • Low input offset current: ± 5 nA typ.
    • Low input offset voltage: ± 2 mV max. for TS391A
    • Input common-mode voltage range includes ground
    • Low output saturation voltage: 250 mV typ. (Io= 4 mA)
    • Differential input voltage range equal to the supply voltage
    • TTL, DTL, ECL, CMOS compatible outputs

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Technical Documentation

    • Description Version Size Action
      DS1551
      Low-power single voltage comparator
      9.0
      391.15 KB
      PDF
      DS1551

      Low-power single voltage comparator

    • Description Version Size Action
      AN4071
      Introduction to comparators, their parameters and basic applications
      1.0
      482.11 KB
      PDF
      AN4071

      Introduction to comparators, their parameters and basic applications

    • Description Version Size Action
      UM0065
      MACROMODELS USER MANUAL FOR STANDARD LINEAR PRODUCTS
      1.0
      120.84 KB
      PDF
      UM0065

      MACROMODELS USER MANUAL FOR STANDARD LINEAR PRODUCTS

HW Model, CAD Libraries & SVD

    • Description Version Size Action
      ST library for all op amps and comparators SPICE models 4.0
      51.6 KB
      ZIP
      TS391 PSpice model 3.0
      1.28 KB
      ZIP

      ST library for all op amps and comparators SPICE models

      TS391 PSpice model

Presentations & Training Material

    • Description Version Size Action
      ST Analog Products for Automotive applications 11.2017
      2.05 MB
      PDF

      ST Analog Products for Automotive applications

Publications and Collaterals

    • Description Version Size Action
      ST Analog cards High-performance operational amplifiers and comparators, the best choice for longevity, robustness and performance. 1.0
      818.4 KB
      PDF

      ST Analog cards High-performance operational amplifiers and comparators, the best choice for longevity, robustness and performance.

    • Description Version Size Action
      Amplifiers & Comparators - Broaden Your Horizons 1.0
      2.55 MB
      PDF
      Operational Amplifiers (Op Amps) - Quick Reference Guide 2.0
      2.76 MB
      PDF
      Products and solutions for Smart industry 3.0
      2.99 MB
      PDF

      Amplifiers & Comparators - Broaden Your Horizons

      Operational Amplifiers (Op Amps) - Quick Reference Guide

      Products and solutions for Smart industry

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
TS391ILT
Active
SOT23-5L Industrial Ecopack3
TS391IQ2T
Active
UFSON 8 2x2x0.6 Industrial Ecopack3
TS391IYLT
Active
SOT23-5L Automotive Ecopack3
TS391RILT
Active
SOT23-5L Industrial Ecopack3
TS391RIYLT
Active
SOT23-5L Automotive Ecopack3

TS391ILT

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

TS391IQ2T

Package:

UFSON 8 2x2x0.6

Material Declaration**:

PDF XML

Marketing Status

Active

Package

UFSON 8 2x2x0.6

Grade

Industrial

RoHS Compliance Grade

Ecopack3

TS391IYLT

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Automotive

RoHS Compliance Grade

Ecopack3

TS391RILT

Package:

SOT23-5L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SOT23-5L

Grade

Industrial

RoHS Compliance Grade

Ecopack3

TS391RIYLT

Package:

SOT23-5L

Material Declaration**:

Marketing Status

Active

Package

SOT23-5L

Grade

Automotive

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
TS391RIYLT Available at 2 distributors

Distributor availability ofTS391RIYLT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 960 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

960

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-09

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -37 125 MALAYSIA
TS391IYLT Available at 8 distributors

Distributor availability ofTS391IYLT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7221 1 Order Now
RS COMPONENTS EUROPE 5500 1 Order Now
AVNET AMERICA 12000 0 Order Now
ARROW EUROPE 36000 0 Order Now
Newark Element14 AMERICA 62 0 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 3112 1 Order Now
Farnell Element14 EUROPE 651 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

7221

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5500

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

36000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

62

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3112

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

651

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 MALAYSIA 0.348 / 1k
TS391RILT Available at 9 distributors

Distributor availability ofTS391RILT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10679 1 Order Now
AVNET AMERICA 51000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
ARROW EUROPE 6000 0 Order Now
Newark Element14 AMERICA 1095 0 Order Now
ARROW AMERICA 15000 3000 Order Now
MOUSER WORLDWIDE 10159 1 Order Now
Farnell Element14 EUROPE 1705 1 Order Now
RUTRONIK EUROPE 6000 3000 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

10679

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

51000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1095

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

15000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

10159

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1705

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

6000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -37 125 MALAYSIA 0.29 / 1k
TS391IQ2T Available at 3 distributors

Distributor availability ofTS391IQ2T

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1031 1 Order Now
MOUSER WORLDWIDE 2987 1 Order Now
Farnell Element14 EUROPE 3000 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

1031

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2987

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3000

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

Buy now
Active
EAR99 NEC Tape And Reel UFSON 8 2x2x0.6 -37 125 CHINA 0.348 / 1k
TS391ILT Available at 11 distributors

Distributor availability ofTS391ILT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 18661 1 Order Now
YOSUN ASIA/PACIFIC 200 1 Order Now
COMPEL EUROPE 5640 1 Order Now
RS COMPONENTS EUROPE 8570 10 Order Now
AVNET AMERICA 147000 0 Order Now
FUTURE WORLDWIDE 8500 1 Order Now
ARROW EUROPE 2067000 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
ARROW AMERICA 510005 1 Order Now
MOUSER WORLDWIDE 8862 1 Order Now
Farnell Element14 EUROPE 7505 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

18661

Min.Order

1

Region

WORLDWIDE Order Now

YOSUN

Stock

200

Min.Order

1

Region

ASIA/PACIFIC Order Now

COMPEL

Stock

5640

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

8570

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

147000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

8500

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2067000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

510005

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

8862

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7505

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

Buy now
Active
EAR99 NEC Tape And Reel SOT23-5L -40 125 CHINA 0.29 / 1k

TS391RIYLT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

Distributor availability ofTS391RIYLT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1000 1 Order Now
MOUSER WORLDWIDE 960 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

1000

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

960

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-08-09

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-37

(max)

125

Budgetary Price (US$)* / Qty

Country of Origin

MALAYSIA

TS391IYLT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.348 / 1k

Distributor availability ofTS391IYLT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7221 1 Order Now
RS COMPONENTS EUROPE 5500 1 Order Now
AVNET AMERICA 12000 0 Order Now
ARROW EUROPE 36000 0 Order Now
Newark Element14 AMERICA 62 0 Order Now
ARROW AMERICA 6000 3000 Order Now
MOUSER WORLDWIDE 3112 1 Order Now
Farnell Element14 EUROPE 651 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

7221

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

5500

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

12000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

36000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

62

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

6000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

3112

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

651

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.348 / 1k

Country of Origin

MALAYSIA

TS391RILT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.29 / 1k

Distributor availability ofTS391RILT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10679 1 Order Now
AVNET AMERICA 51000 0 Order Now
FUTURE WORLDWIDE 6000 3000 Order Now
ARROW EUROPE 6000 0 Order Now
Newark Element14 AMERICA 1095 0 Order Now
ARROW AMERICA 15000 3000 Order Now
MOUSER WORLDWIDE 10159 1 Order Now
Farnell Element14 EUROPE 1705 1 Order Now
RUTRONIK EUROPE 6000 3000 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

10679

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

51000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

6000

Min.Order

3000

Region

WORLDWIDE Order Now

ARROW

Stock

6000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

1095

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

15000

Min.Order

3000

Region

AMERICA Order Now

MOUSER

Stock

10159

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1705

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

6000

Min.Order

3000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-37

(max)

125

Budgetary Price (US$)* / Qty

0.29 / 1k

Country of Origin

MALAYSIA

TS391IQ2T

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.348 / 1k

Distributor availability ofTS391IQ2T

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1031 1 Order Now
MOUSER WORLDWIDE 2987 1 Order Now
Farnell Element14 EUROPE 3000 1 Order Now

Distributor reported inventory date: 2020-08-09

Distributor Name

DIGIKEY

Stock

1031

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

2987

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3000

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-09

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

UFSON 8 2x2x0.6

Operating Temperature (°C)

(min)

-37

(max)

125

Budgetary Price (US$)* / Qty

0.348 / 1k

Country of Origin

CHINA

TS391ILT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.29 / 1k

Distributor availability ofTS391ILT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 18661 1 Order Now
YOSUN ASIA/PACIFIC 200 1 Order Now
COMPEL EUROPE 5640 1 Order Now
RS COMPONENTS EUROPE 8570 10 Order Now
AVNET AMERICA 147000 0 Order Now
FUTURE WORLDWIDE 8500 1 Order Now
ARROW EUROPE 2067000 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
ARROW AMERICA 510005 1 Order Now
MOUSER WORLDWIDE 8862 1 Order Now
Farnell Element14 EUROPE 7505 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

18661

Min.Order

1

Region

WORLDWIDE Order Now

YOSUN

Stock

200

Min.Order

1

Region

ASIA/PACIFIC Order Now

COMPEL

Stock

5640

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

8570

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

147000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

8500

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

2067000

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

510005

Min.Order

1

Region

AMERICA Order Now

MOUSER

Stock

8862

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

7505

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SOT23-5L

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.29 / 1k

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors