The diversity of the currently used types of digital circuits and their manufacturing technology force the designers to work on various supply voltage levels. However, even if power supply circuits of a device make available all power sections necessary for its proper work, it does not mean that the system will work correctly. Properly selected voltage converters are still needed to ensure appropriate voltage levels of digital signals accepted by individual ICs.
4-channel logic level converter
The module allows to exchange data between systems that use the most popular levels of voltage: 5 V <-> 3.3 V and 3.3 V <-> 1,8 V. It works in both directions simulatneously....Logic level converter 3,3V / 5V - UART - Iduino ST1167
The module allows to exchange data between systems that use two popular voltages: 3.3 V and 5 V Ensures the connection of the UART interface.Logic level converter 3,3V / 5V - I2C UART SPI
The module allows to exchange data between systems that use two popular voltages: 3.3 V and 5 V. It provides connection of interfaces: UART, SPI and I2C.Logic level bi-directional converter, 4-channel - Pololu 2595
Miniature (13 x 10 mm). the module allows to exchange data between systems that use the most popular voltage levels ranging from 1.5 V to 18 V and Vice versa. Four channels to...Logic level bi-directional converter, 4-channel - SparkFun BOB-12009
The module allows to exchange data between systems that use the most popular voltages levels: 5 V and 3.3 V and 1.8 V and 2.8 V. Works in both directions simultaneously. It has...Pixel Boost module - 3.3V / 5V voltage buffer for WS2812B diodes
The module is used to control the WS2812B LEDs, in the case of a microcontroller running on voltage 3.3 V. It includes a buffer that allows you to convert voltages. Module...Uni-directional Logic Level Converter - 4 Isolated Channels - SB Components SKU24094
The unidirectional logic level converter from SB Components converts digital signals with voltages from 5 V to 24 V to voltages in the range of 3.3 V to 5 V. This...Voltage converter 3-5.5V to 3.3V 2A - TPS62827 - Adafruit 4920
Voltage converter equipped with TPS62827 chip. It allows to obtain from input voltage in the range of 3 V to 5.5 V an output value of 3 .3 V with a current of 2 A . It...- Reduced price
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DFRobot Gravity - analog signal isolator
The module prevents the operation interference of the sensors through the insulation of the analog signal and providing an isolated power for sensors. It is supplied with the...Logic level transmitter TXB0104 bi-directional, 4-channel - SparkFun BOB-11771
The module allows to exchange the data between systems that use the most popular voltage levels: from 1.2 V to 3.6 V for VCCA inputs, and from 1.65 V to 5.5 V for VCCB inputs....Level Booster Breakout - 3V - 5V voltage level converter - STEMMA QT / Qwiic - Adafruit 5649
Level Booster Breakout is a board produced by Adafruit, it has the form of a voltage level converter that allows you to obtain an output voltage of 5 V from an input voltage...TXB0108 - two-way, 8-channel logic converter - Adafruit 395
The module is based on a TXB0108 system, it allows you to exchange data between systems that use the most popular voltage levels: 3.3 V and 5V. It has eight channels, it...Qwiic - adapter 1,8V - SparkFun SPX-19017
A voltage adapter that allows you to adjust the voltage of 1.8 V to the 3.3 V level used in the Qwiic system. The module is used when the user has to connect an element with...TLV62569 - converter breakout 5,5V/3,3V 1,2A - Adafruit 4711
The converter is based on the TLV62569 chip . Enables you to get output voltage of 3.3 V. Input voltage range: 2.5 V to 5.5 V. It provides a continuous load current of...Level Shifter Breakout - 5V - 3V voltage level converter - STEMMA QT / Qwiic - Adafruit 5637
Voltage level converter that allows you to obtain an output voltage of 3 V from an input voltage in the range of 3 V to 5 V. It has a built- in 3.3 V voltage stabilizer...Grove - voltage divider 5V/43V
A voltage divider is used, when the measured voltage has a larger value than the AC converter range. The device operates in two ranges, selectable with a switch: from 0.3 V to...- EOL
Uni-directional Logic Level Converter - 8 Isolated Channels - SB Components SKU24094
The unidirectional logic level converter from SB Components converts digital signals with voltages from 5 V to 24 V to voltages in the range of 3.3 V to 5 V. This...Logic level converter I2C PCA9306 - SparkFun BOB-15439
The module allows bidirectional communication between circuits using different voltage levels for I2C and SMBus. PCA9306 converts voltages from lower range from 1.2 V to 3.3 V...8-channel bi-directional logic level converter
The module allows you to exchange data between systems that use the most popular voltages: from 3.3 V to 5.5 V and vice versa. Eight channels allow for connection of various...See also
Logical levels, or 1 isn't equal 1
The theory of digital circuits in terms of methods of representation of logical states is trivially simple. In the most commonly used so called positive logic - zero means low state (L), while the voltage equal to supply voltage (e.g. 3.3 V or 5 V) corresponds to logic one, i.e. high state (H). So much theory; practice, as usual, is much more complex. Every digital circuit correctly interprets the input voltages within the range specified by the manufacturer, and the same is true of the output signals, which during normal operation cannot exceed a certain narrow range. However, if one circuit (e.g. microcontroller) would be supplied with 5 V, and the other with 3.3 V - it is necessary to use a voltage converter (also called a logic level converter), which will not only ensure proper communication between particular circuits, but also protect lower voltage circuits from potential damage by too high input voltages.
Types and parameters of converters levels of logical
The basic division of voltage converters is based on in which (how many) directions these components can transmit digital signals. Many converters transmit digital signals only in a specific direction, although some designs are able to work correctly regardless of which way the information is transmitted (i.e. which circuit is the transmitter and which the receiver). This is how, among others, very simple but highly efficient voltage converters with a design based on low-power MOSFETs work. Apart from the direction of operation, the key parameters of each converter are: the number of channels, acceptable voltage levels on both sides, as well as the maximum frequency of transmitted signals and - in some cases - propagation times (i.e. the delay between a change in the signal at the output in relation to the corresponding change in the input of a given channel).
Voltage converters at Botland store
In this category you will find a range of very useful modules, perfect for use both in prototype circuits and target solutions. All voltage converters are offered as universal modules with convenient goldpin connectors (soldered or self-assembled) - and ready to use with connecting cables, available in our shop in practical kits. Apart from converters designed to work with digital outputs and inputs, we also have specialised modules allowing I2C communication. These modules (e.g. PCA9306) take into account the specifics of the physical layer of the I2C interface and enable seamless, stable cooperation of systems with different supply voltages.