This device works well when it is properly configured!
I use the device to step 3.3V micro controller output signals to 5 V when driving a MAX7219 seven-segment display.
Like other reviewers, I suspect most of the negative reviews about this device not working are due to grounding the OE pin. The OE pin *MUST* be set to VA input voltage!
One other concern is when using the device on a breadboard going from 3.3V to 5V, minimize the length of the VB output wires. I had cross talk issues using long breadboard leads. I suspect those amplified signal lead loops were acting like little radio transmitters, but when I ran direct, minimally short connection wires the MAX7219 display was rock solid.
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Reviews with images
Works for me! REMEMBER TO CONNECT OE INPUT to VA PIN!
This device works well when it is properly configured!I use the device to step 3.3V micro controller output signals to 5 V when driving a MAX7219 seven-segment display.Like other reviewers, I suspect most of the negative reviews about this device not working are due to grounding the OE pin. The OE pin *MUST* be set to VA input voltage!One other concern is when using the device on a breadboard going from 3.3V to 5V, minimize the length of the VB output wires. I had cross talk issues using long breadboard leads. I suspect those amplified signal lead loops were acting like little radio transmitters, but when I ran direct, minimally short connection wires the MAX7219 display was rock solid.
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Reviewed in the United States on March 6, 2024
I use the device to step 3.3V micro controller output signals to 5 V when driving a MAX7219 seven-segment display.
Like other reviewers, I suspect most of the negative reviews about this device not working are due to grounding the OE pin. The OE pin *MUST* be set to VA input voltage!
One other concern is when using the device on a breadboard going from 3.3V to 5V, minimize the length of the VB output wires. I had cross talk issues using long breadboard leads. I suspect those amplified signal lead loops were acting like little radio transmitters, but when I ran direct, minimally short connection wires the MAX7219 display was rock solid.
Works for me! REMEMBER TO CONNECT OE INPUT to VA PIN!
Reviewed in the United States on March 6, 2024
This device works well when it is properly configured!Reviewed in the United States on March 6, 2024
I use the device to step 3.3V micro controller output signals to 5 V when driving a MAX7219 seven-segment display.
Like other reviewers, I suspect most of the negative reviews about this device not working are due to grounding the OE pin. The OE pin *MUST* be set to VA input voltage!
One other concern is when using the device on a breadboard going from 3.3V to 5V, minimize the length of the VB output wires. I had cross talk issues using long breadboard leads. I suspect those amplified signal lead loops were acting like little radio transmitters, but when I ran direct, minimally short connection wires the MAX7219 display was rock solid.
Images in this review
Reviewed in the United States on March 11, 2024
Limitation of the chip is that it suffers at long distance, this works well at short distances.
5 of 5 chips worked fine, remember to V_A < V_B and connect OE to V_A.
5 of 5 chips worked fine, remember to V_A < V_B and connect OE to V_A.
Images in this review
Reviewed in the United States on April 17, 2024
Reviewed in the United States on August 15, 2021
Only negative is the HiLetgo board doesn't have gold plated pads or square pins, but that can be excused at this price. The TXS0108E level converter is fantastic! If it doesn't work it's probably because you read the instructions here to connect OE to ground. OE needs to be connected to VA, as others have pointed out.
I connected from an output on a SAMD21 microcontroller running at 3.6v directly to this part (and a 10x scope probe) and the high (B) side runs at 5 volts connected to an input pin on an AVR microcontroller. About 4" of wire was used for interconnect. The attached scope screen capture shows maybe 1ns at most insertion loss. (note- bottom trace is input, top trace is output). The reason? Well the microcontroller output has a rise time of 11ns which is squared up to a rise time of 6ns in the level converter! This almost makes up for the delay of the part.
To put this in perspective, level converters available here that use MOSFET transistors and offer no gain nor have active pullup capability have more than 600ns delay which can make them useless for connecting high speed peripherals. Not so with this part!
I connected from an output on a SAMD21 microcontroller running at 3.6v directly to this part (and a 10x scope probe) and the high (B) side runs at 5 volts connected to an input pin on an AVR microcontroller. About 4" of wire was used for interconnect. The attached scope screen capture shows maybe 1ns at most insertion loss. (note- bottom trace is input, top trace is output). The reason? Well the microcontroller output has a rise time of 11ns which is squared up to a rise time of 6ns in the level converter! This almost makes up for the delay of the part.
To put this in perspective, level converters available here that use MOSFET transistors and offer no gain nor have active pullup capability have more than 600ns delay which can make them useless for connecting high speed peripherals. Not so with this part!
Images in this review
Reviewed in the United States on August 30, 2023
Reviewed in the United States on March 6, 2024
