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    Common Level Shifting Techniques


    ALLPCB
    https://www.allpcb.com › allelectrohub › common-level-...
    ALLPCB
    https://www.allpcb.com › allelectrohub › common-level-...
    Sep 15, 2025 — Compare diode, BJT, MOSFET and dedicated IC level shifters for voltage translation: pros, cons, and best use cases for I2C, UART, GPIO.
    Missing: factory ‎| Show results with: factory

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    Common Level Shifting Techniques
    Voltage level shifting translates data and control signals between different voltage domains (e.g.,
    5 V 5 V
    5 V
    ,
    3.3 V 3.3 V
    3 . 3 V
    ,
    1.8 V 1.8 V
    1 . 8 V
    ) to ensure, for example, that a
    5 V 5 V
    5 V
    micro-controller can communicate with
    3.3 V 3.3 V
    3 . 3 V
    sensors. Key techniques include integrated circuits (ICs) for high-speed/multi-channel needs, MOSFETs/transistors for I2C and bidirectional communication, and voltage dividers for simple, low-cost step-down conversions .
    This video explains the basics of voltage level shifting:
    Related video thumbnail
    59s
    ForceTronics
    YouTube • Mar 22, 2014
    Common Voltage Level Shifting Techniques
    • Integrated Level-Shifter ICs: Preferred for modern designs requiring speed and efficiency (e.g., for 8- or 16-bit interfaces), ICs offer flexibility, ESD protection, and push-pull support. Examples include the 74AVC series for bidirectional, low-voltage translation.
    • MOSFET-Based Shifters (Bidirectional): A single N-channel enhancement MOSFET (e.g., BS170) with pull-up resistors is the standard for I2C bus translation. When the gate connects to the lower voltage, and sources/drains to the respective bus lines, it allows bidirectional communication between
      3.3 V 3.3 V
      3 . 3 V
      and
      5 V 5 V
      5 V
      systems.
    • Resistor Dividers: A simple, cost-effective method to step down voltage (e.g.,
      5 V 5 V
      5 V
      to
      3.3 V 3.3 V
      3 . 3 V
      ). However, this method is unsuitable for high-speed, bidirectional communication and only works for reducing voltage.
    • Transistor/Switching Circuits: NPN transistors or simple CMOS inverters can switch signals between domains, often used for uni-directional, "quick and dirty" level shifting.
    • Cascode Configurations: Used in high-voltage (HV) CMOS processes to protect low-voltage devices by limiting the gate voltage, as discussed on Electronics Stack Exchange .
    This video demonstrates how a bi-directional logic level shifter works:
    Related video thumbnail
    1m
    The Design Graveyard
    YouTube • Jan 16, 2026
    Key Considerations
    • Data Rates: ICs are best for high-speed, while passive components (resistors) are better for low-speed.
    • Directionality: Select between unidirectional (transistor) or bidirectional (MOSFET/IC) based on the protocol, such as I2C, as discussed in this EDN article.
    • Voltage Tolerances: Ensure lower voltage devices are 5V-tolerant if directly interfacing with higher voltages.
    • Power Consumption: Active ICs may have different power profiles than passive, component-based circuits, with new designs focusing on low-power, as discussed in this ResearchGate paper .
    Level Shifting Techniques in I2C-Bus Design - EDN
    Nov 14, 2012 — Different voltage devices could be connected to the same bus by using pull-up resistors to the supply voltage line. Although this ...
    EDN - Voice of the Engineer
    Common Level Shifting Techniques - ALLPCB
    Sep 15, 2025 — When SDA2 (5V side) outputs high: Vgs of Q1 remains 0, Q1 stays off, and SDA1 is pulled up to 3.3V by R2. When SDA2 outputs low: t...
    ALLPCB
    3m
    Voltage Level Shifting Tutorial
    YouTube · ForceTronics
    How to Level Shift 1-Wire Systems | Analog Devices
    Summary. Level shifting at its core is composed of a few simple techniques, all of which can be applied to many types of serial co...
    Analog Devices
    How level shifters enable the transition to low-voltage ...
    You cannot simply connect the data and control interfaces of devices on different voltage rails together and then expect them to i...
    TI.com
    5m
    Level Shifting Tutorial 5V-3.3V Quick and Dirty Methods
    YouTube · Kevin Darrah
    Level shifting in HV CMOS processes
    May 30, 2016 — This restricted gate voltage makes level shifting difficult. Some solutions for level shifting include: * **Using a resistor for t...
    Electrical Engineering Stack Exchange
    Design of fast low-power floating high-voltage level-shifters
    Oct 29, 2025 — The conventional topology is analysed, showing the strong dependence of speed and dynamic power on circuit area. Novel techniques ...
    ResearchGate
    How can I achieve level shifting from 3.3V to 0.8V and vice versa?
    Table_title: Step-down voltage conversion: Table_content: header: | Product Name | Operating Voltage Range | Number of bit | row: ...
    Toshiba Electronic Devices & Storage Corporation
    Level Shifters for High-speed 1-V to 3.3-V Interfaces in a ... - MIT
    up shifter and 3.3-V PMOSs in level-down shifter cannot turn. on. There are two approaches to reduce the gap between VDD and Vt of...
    Massachusetts Institute of Technology
    • Level Shifting Techniques in I2C-Bus Design - EDN
      Nov 14, 2012 — Different voltage devices could be connected to the same bus by using pull-up resistors to the supply voltage line. Although this ...
      EDN - Voice of the Engineer
    • Common Level Shifting Techniques - ALLPCB
      Sep 15, 2025 — When SDA2 (5V side) outputs high: Vgs of Q1 remains 0, Q1 stays off, and SDA1 is pulled up to 3.3V by R2. When SDA2 outputs low: t...
      ALLPCB
    • Voltage Level Shifting Tutorial
      Mar 22, 2014 — or if you're using a Bluetooth module that has 3.3 volts and you're trying to communicate with an Arduino Uno we need to convert t...
      YouTube · ForceTronics
      3m
    • How to Level Shift 1-Wire Systems | Analog Devices
      Summary. Level shifting at its core is composed of a few simple techniques, all of which can be applied to many types of serial co...
      Analog Devices
    • How level shifters enable the transition to low-voltage ...
      You cannot simply connect the data and control interfaces of devices on different voltage rails together and then expect them to i...
      TI.com
    • Level Shifting Tutorial 5V-3.3V Quick and Dirty Methods
      Feb 3, 2015 — and I'll even show you how to shift them back up to 5 volts. and uh I'll break a few of the methods down i'll show you the signals...
      YouTube · Kevin Darrah
      5m
    • Level shifting in HV CMOS processes
      May 30, 2016 — This restricted gate voltage makes level shifting difficult. Some solutions for level shifting include: * **Using a resistor for t...
      Electrical Engineering Stack Exchange
    • Design of fast low-power floating high-voltage level-shifters
      Oct 29, 2025 — The conventional topology is analysed, showing the strong dependence of speed and dynamic power on circuit area. Novel techniques ...
      ResearchGate
    • How can I achieve level shifting from 3.3V to 0.8V and vice versa?
      Table_title: Step-down voltage conversion: Table_content: header: | Product Name | Operating Voltage Range | Number of bit | row: ...
      Toshiba Electronic Devices & Storage Corporation
    • Level Shifters for High-speed 1-V to 3.3-V Interfaces in a ... - MIT
      up shifter and 3.3-V PMOSs in level-down shifter cannot turn. on. There are two approaches to reduce the gap between VDD and Vt of...
      Massachusetts Institute of Technology
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    Logic Level Shifting Basics


    DigiKey
    https://www.digikey.com › blog › logic-level-shifting-b...
    DigiKey
    https://www.digikey.com › blog › logic-level-shifting-b...
    Aug 5, 2021 — Mainstay 5 V logic is joined by ever lower voltage standards like 3.3 V, 2.5 V, 1.8 V and lower, resulting in the need for mismatched ...

    In order to achieve a step-down (5 V → 3.3 V) and step-up (3.3 ...


    Toshiba Electronic Devices & Storage Corporation
    https://toshiba.semicon-storage.com › logic_levelshifters
    Toshiba Electronic Devices & Storage Corporation
    https://toshiba.semicon-storage.com › logic_levelshifters
    Step-up voltage translation: Level shifting from a lower voltage to a higher voltage such as from 3.3 V to 5 V can be performed if the high-level output voltage ... Read more

    Level Shifting Techniques in I2C-Bus Design


    EDN - Voice of the Engineer
    https://www.edn.com › level-shifting-techniques-in-i2c-b...
    EDN - Voice of the Engineer
    https://www.edn.com › level-shifting-techniques-in-i2c-b...
    Nov 14, 2012 — Logic level shifting may be required when interfacing legacy devices with newer devices that use a smaller geometry process. Read more
    Missing: factory ‎| Show results with: factory

    Voltage level shifting circuit and method


    Google Patents
    https://patents.google.com › patent
    Google Patents
    https://patents.google.com › patent
    A voltage level shifting circuit and method that can be used for shifting the voltage level of an input signal to provide an output signal having a higher ...
    Missing: factory ‎| Show results with: factory

    Voltage Level Shifting Tutorial


    YouTube · ForceTronics
    29K+ views · 11 years ago
    YouTube · ForceTronics
    29K+ views · 11 years ago
    7:47
    In this tutorial we look at three methods for converting or shifting a digital logic level from one voltage level to another voltage level.
    9 key moments 9 key moments in this video
    From 00:00
    Intro
    From 00:55
    Level shifting ICs
    From 01:51
    Voltage Divider Method
    From 02:11
    5v to 3.3v conversion
    From 03:28
    Voltage Divider Example
    From 03:59
    NPN Transistor
    From 05:13
    Demo
    From 05:33
    Voltage Level Shifting Demo
    From 07:14
    Conclusion
    Missing: factory ‎| Show results with: factory
    ForceTronics
    YouTube ·
    Mar 22, 2014

    Voltage Level Shifting Tutorial

    YouTube · ForceTronics · Mar 22, 2014
    YouTube
    In this video
    • 00:00
      Intro
    • 00:55
      Level shifting ICs
    • 01:51
      Voltage Divider Method
    • 02:11
      5v to 3.3v conversion
    • 03:28
      Voltage Divider Example
    • 03:59
      NPN Transistor
    • 05:13
      Demo
    • 05:33
      Voltage Level Shifting Demo
    • 07:14
      Conclusion

    High-side devices – level shifting | Video | TI.com


    Texas Instruments
    https://www.ti.com · Mar 24, 2021
    Texas Instruments
    https://www.ti.com · Mar 24, 2021
    This lecture will discuss how to level shift digital signals to high-side device gate drivers.
    Missing: factory ‎| Show results with: factory

    Analog voltage level conversion (level shift)


    Electrical Engineering Stack Exchange
    https://electronics.stackexchange.com › questions › anal...
    Electrical Engineering Stack Exchange
    https://electronics.stackexchange.com › questions › anal...
    Apr 26, 2012 — You want a simple gain of 5/2 = 2.5 centered around 2.5 V. This is easy assuming you have 5 V power available, like from the motor controller. Read more
    3 answers · Top answer: You want a simple gain of 5/2 = 2.5 centered around 2.5 V. This is easy assuming you have 5 ...

    How Level Shifters Enable the Transition to Low-voltage ...


    TI.com
    https://www.ti.com › lit › pdf › ssztav5
    TI.com
    https://www.ti.com › lit › pdf › ssztav5
    PDF
    Industrial system designers resolve voltage -level differences in data and control interfaces by level shifting . (also known as level translating) the ... Read more

    Level Shifters for High-speed 1-V to 3.3-V Interfaces in a ...


    Massachusetts Institute of Technology
    http://web.mit.edu › magic › Public › papers
    Massachusetts Institute of Technology
    http://web.mit.edu › magic › Public › papers
    PDF
    by WT Wang · Cited by 80 — Level shifters for 1.0-V to 3.3-V high-speed interfaces are proposed. Level-up shifter uses zero-Vt 3.3-V NMOSs as voltage clamps to protect 1.0-V NMOS switches ... Read more
    4 pages
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