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8-channel Bi-directional Logic Level Converter - TXB0108, RoHS
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8-channel Bi-directional Logic Level Converter - TXB0108, RoHS
Description
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V.
Although one can use resistors to make a divider, for high speed transfers, the resistors can add a lot of slew and cause havoc that is tough to debug. For that reason, we like using 4050/74LVX245 series and similar logic to perform proper level shifting. Only problem is that they are only good in one direction which can be a problem for some specialty bi-diectional interfaces and also makes wiring a little hairy.
That's where this lovely chip, the TXB0108 bi-directional level converter comes in! This chip perform bidirectional level shifting from pretty much any voltage to any voltage and will auto-detect the direction. Only thing that doesn't work well with this chip is i2c (because it uses strong pullups which confuse auto-direction sensor). If you need to use pullups, you can but they should be at least 50K ohm - the ones internal to AVRs/Arduino are about 100K ohm so those are OK! Its a little more luxurious than a 74LVX245 but if you just don't want to worry about directional pins this is a life saver!
This breakout saves you from having to solder the very fine pitch packages that this chip comes with. We also add 0.1uF caps onto both sides and a 10K pull-up resistor on the output enable pin so you can use it right out of the box!
Documents
BOB-11771 Voltage-Level Translator - TXB0104 Breakout
Module with a 4-bit bi-directional voltage level converter. It allows you to connect digital interfaces with different operating voltages. KAmodNTS0104PW
BOB-11771 Voltage-Level Translator - TXB0104 Breakout
8-channel voltage level converter allowing for connection of systems operating with the voltage level of 1.8 V, 2.5 V, 3.3 V and 5 V. SparkFun BOB-19626
8-bit voltage level converter with TXB0108 integrated circuit. It acts as a bridge between applications with different source voltages and input and output voltage levels. SB Components 21772
A module enabling the conversion of input voltage in the range from 1.8 V to 5.3 V into the appropriate negative output voltage. It offers high efficiency in excess of 80%, making it ideal for applications where a lower power negative supply is required, such as biasing sensors or op-amp circuits. Pololu 2839
This tiny logic level shifter features four bi-directional channels, allowing for safe and easy communication between devices operating at different logic levels. Pololu - 2595
Module with a voltage level converter 3.3 V - 5 V intended for use in the Qwiic system. It has a built-in Step Up converter providing power supply with a voltage of 5 V and a current of up to 100 mA. SparkFun SPX-17238
8-channel voltage level converter module with an input voltage of 12 V and an output voltage of 3.3 V. Unidirectional, based on resistor dividers. Numato Lab NLVD00008
4-channel converter of logic levels allowing for connection of systems operating with voltage levels of 1.8 V, 2.5 V, 3.3 V and 5 V. DFRobot DFR0843
Bi-directional 8-channel logic level converter module (1.2-3.6V to 1.7-5.5V) based on TXS0108 chip.
The module with the four-bit logic translator TXB0104, can work in both directions. Connections using standard goldpin connectors with 2.54 mm pitch. It is compatible with BOB-11771
3V/5V voltage level converter module with built-in Step-Up converter. Allows development boards operating at 3V to be connected to a device requiring a higher operating voltage of 5V for I2C communication. Adafruit 5649
Module with a voltage level converter from 5 V to 3.3 V, intended for use in the STEMMA QT/Qwiic system. It has a built-in voltage stabilizer providing 3.3 V power supply with a current of up to 500 mA. Adafruit 5637
Module with a voltage divider. Equipped with a Grove connector, it allows the input voltage to be reduced by 3 or 10 times. Seeed Studio 104020000
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8-channel Bi-directional Logic Level Converter - TXB0108, RoHS