Questions tagged [level-translation]
The level-translation tag has no usage guidance.
100
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Single transistor level up shifter
I need a simple, single directionnal level shifter for 3.3V -> 5V conversion.
There are many options on the internet, some using a logic ic and some using 2 NPN transistors (converter and inverter), ...
- 1,014
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3
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Driving high and low inputs of a MOSFET driver with a single PWM signal
(A typical circuit from FAN7390 datasheet.)
I have high-side and low-side MOSFETs to drive. I read dozens of MOSFET driver datasheets, all of them have two separate inputs for controlling high and ...
- 14.1k
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1
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What is the difference between a voltage-level translator and a logic-level translator?
(This is a follow-up to an earlier question of mine.)
I would like to use the GTL2000 bi-directional translator IC to facilitate level translation between a 3.3V circuit and a 5V circuit (including ...
- 4,922
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2
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MOSFET and clamp on I2C interface lines as level tranlastor
I'm trying to understand what's going on in this circuit:
I understand the master direction. I2C lines usually are pulled up by default, so when the line is high or idle, the GS voltage < 0.7V, ...
- 5,382
4
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2
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How to scale and shift voltage signal?
I want to scale and shift my voltage signal by below relation:
$$
V_{out} = \frac {10} {12} \cdot V_{in} - 10
$$
Indeed my primary voltage is from 0v to 24v and I want to put it from -10v to +10v.
...
- 311
4
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2
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713
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Interfacing microcontroller with 1.8V logic
I am in the process of selecting a microcontroller to interface (~30 signal lines) to an FPGA that operates at 1.8V voltage levels.
I have found NXP's Cortex M0's to operate down to 1.8V which is ...
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Voltage shifter distorts signal
I am trying to downshift a 5V TTL signal to 3V logic signal using NTB0102 level shifter. The connection is described below:
However, my oscilloscope measurements are distorted. Even the input signal (...
- 3,172
4
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1
answer
994
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Interfacing a PIC microcontroller to different logic levels
I'm planning on interfacing a PIC microcontroller to two devices which operate on two different logic levels and I'm wondering what the best way of approaching this is. I'm rather inexperienced in ...
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Is it legitimate to level shift down a logic input with just series resistance?
In this particular instance, I'm using a STWD100NYWY3F with a 3.3v Vcc and feeding it's !EN input from a 5v TTL signal (from a SN74LS00D). The absolute max input is Vcc + 0.3v. I propose to just put a ...
- 1,573
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how to increase the voltage of a digital signal?
I'd like my Raspberry Pi GPIO port to communicate with a digital circuit that works at 2x the GPIO voltage. The communication will be at a relatively high frequency (up to 500kHz).
The main question ...
- 53
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3
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Level transformation 0/+5 V TTL logic to +/-9V how to maximize gain and frequency range (DC to 4 MHz)
I see a lot of repeat answers and instructions how to convert dual supply levels to logic levels, but I have the inverse situation, converting 0/+5 V TTL logic to +/-9 V, and I don't see a lot of info ...
- 1,491
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2
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Design Review: 3.3V Logic to 12V Logic (Uni-directional and Bi-directional)
I'm looking for feedback and improvements on my design below. Specific questions are at the end. I created this as an attempt to answer my own, previous question. From my feedback there, it seems like ...
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74HC125 vs 74HCT125
I need an IC for two separate functions.
The first is level translation from 3.3 V to 5V, so that I can use a TFT touch screen with an Arduino Uno. In order for the touch function to work, level ...
- 435
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2
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147
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Self-adjusting analog signal translator
I think this question is best asked on concrete-ish terms, so, here it goes.
Let's say we have 4 wires, all with common ground:
A) ≈9V-20V, varying.
B) ≈3V-6V, varying.
C) A low frequency analog ...
- 17
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3
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1.8V UART with 3.3V UART
I have Quectel EC25 module comes with GPRS and GNSS in built, this module needs supply of 3.3V and it's UART works at 1.8V (default Baudrate is 115200) - But i have a processor ATMEGA2560V running at ...
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How to level shift an analog signal?
I have a sinusoidal input signal (with a swing of 100mV roughly) centered around 100mV (DC). This signal needs to be input to a CMOS inverter. For this I need to level shift my signal around the ...
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Can Bruce Abbott's inverting TTL to +/- 12V level shifter be improved to better frequency response and better matched impedance?
I am working with Bruce Abbott's awesome level shifter here.
Level transformation 0/+5 V TTL logic to +/-9V how to maximize gain and frequency range (DC to 4 MHz)
simulate this circuit – ...
- 1,491
2
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2
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mosfet capacitance charging question
Can someone please explain to me why the output of this level-shifting circuit starts charging from around 2.8V to 5V, and NOT from 3.3V to 5V.
At the time where the output is at 5V there is a 3.3V ...
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4
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249
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Timer + voltage level translation circuit
I'm looking for a digital circuit whose behavior I will describe in a moment. It has one digital input (5V logic) and two digital outputs (12V logic). I'll hereby refer to these levels as 0 and 1, but ...
- 1,612
2
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1
answer
272
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Logic Level Translator caveats
I have a device that runs on 2.5Vcmos logic levels, there are about a half dozen ic's with a mixture of parallel and serial (TWI and I2C) signal lines. Rather than placing my own uC on the board I'd ...
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Circuit for 4-20mA to I2C conversion
Hello I have a circuit that takes a 4-20mA reading from a pressure transmitter and converts it to analog 0-5V then to I2C. But it doesn't seem to be reading I just see about 0.5V on the serial ...
- 1,243
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1
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325
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Multiple ground planes, single point ground, and a level shifter
I'm using a level shifter to go from 3.3V to 5V (digital/analog). According to the datasheet, if I put 1 ground on the left side of the IC and the other on the right, it would tie the grounds together ...
- 136
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0
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127
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Upward Voltage Level Translation
I need to up-translate two complementary 2.5 V signals to 5 V. I am looking for a circuit which can do this and which consumes ultra-low static power. I tried to design one, using 4 MOSFETs as shown ...
- 85
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5
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214
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Non-inverting buffer to drive LED using different power source
Some of the answers are now incorrect because the original question was "confused". In an ideal world, the question should have been maintained with its original sense after answers were ...
- 7,098
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2
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190
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Odd level translator output waveform from 3MHz
I am using SN74LVC1T45 for level translation from 1.8V to 5V. I have designed a custom board for this. The problem I am facing here is that I am getting desired out from 10Hz to 2MHz but from 3MHz the ...
- 217
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3
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How does an auto bidirectional voltage translator work?
I'm trying to understand how the auto bi-directional voltage translators work.
Background:
I have to choose a part that can translate signals in both ...
- 404
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3
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156
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Sticky/Intermittent Relay Driven by MCU and NPN Transistor
I have an MCU (1.8 V logic levels) driving an NPN transistor to turn an relay on/off. The relay has a 12 V DC coil with resistance of 1028R per datasheet. This would require a current of 12/1028 = 11....
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2
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What happens when level translator input and output are shorted?
I am using a level translator in my design to interface between two systems. I also want an option to bypass the level translator by shorting a jumper resistor placed across terminals A and B.
What ...
1
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1
answer
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5V to 3.3V Level shifting circuit
I am interfacing an SD card to the Z80, one of which uses 5 V logic (Z80) and the other uses 3.3 V logic (SD). I believe the 3.3 V to 5 V level shifting will be taken care ...
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3
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What does V(L) stand for in Translators?
This may be an easy question, but I do not understand why Maxim uses the letter "L" within the second supply voltage for MAX13046E. Other manufacturers like TI and NXP use names such as VCC(A), VCC(B) ...
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Level shifter is injecting noise to ground
I have a camera core with a DVP interface which has 2.5 V data logic and the system I am using is 3.3 V level. So I have used a TI SN74AVC20T245 level shifter to shift 2.5 V to 3.3 V.
The image from ...
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5
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Actual reason why I have distortion in lower part of this square wave amplifier (level translator application)
I am designing a simple level translator using 2 transistors connected in series in LTSPICE simulator. I tried with one transistor but the output from the collector pin is 180 degree out of phase, as ...
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2
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Using BSS138 in Level Switcher
I am trying to interface 1.8v UART and 3.3v UART using NXP app note here. Unfortunately, my circuit does not perform as expected. I am using BSS138 as mentioned in Adafruit and Spakrfun.
When I ...
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1
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Normal current flow in LSF010x level translators
I am reviewing the datasheet and design documents for a level translator. TI has a great video explaining the operation of this device. I understand how the device works but my only concern is with ...
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3
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Can I Use an Isolated DC/DC Converter to Step Down a Switching Dynamic Signal?
I have a 24V device that takes a signal of either of 36V or 72V that will switch on and off at around 2Hz. This signal needs to be converted to 24V and I'm considering this isolated DC/DC converter ...
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2
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Is my understanding of this level shifter correct?
I am considering using this TI LSF0102 level shifter in my circuit - but would like to understand, based upon its datasheet, if I have my understanding correct.
My aim is to be able to supply 3.3V ...
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3
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3V3 to 5V level conversion
I'm currently working on the development of some measurement equipment. For conversions I use a small ARM which runs on 3V3 and to display the results I use a graphical display running on 5V. This ...
- 300
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1
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Does NCA9306 level translator need a power source that can sink current?
I wanted to use LSF0102 translator IC to translate 5V to 3.3V with TWI/I2C but I noticed in datasheet it says it needs the low voltage/side's power source to be able to sink current (about 15mA of ...
- 3,280
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2
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Advice on translating a 3V3 PWM signal to a 6V PWM signal
I'm trying to control 3 20Kg servo motors powered by 6V (Link to servo motor datasheet here), using an STM32L5 microcontroller. Currently, the design uses an Arduino Pro Mini powered by 5V, and using ...
- 349
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2
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What does OE do on TXB0102 device
Can somebody explain in short terms whats means this from datasheet TXB0102:
When the output-enable (OE) input is low, all outputs are placed in
the high-impedance state.
I dont know how I ...
- 101
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2
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How can I build a versatile high voltage translator with an output in the negative and positive range?
Looking for advice on how to build an adjustable voltage translator. Input is standard 1V8 logic, but output HIGH is in a selectable range of +3 to -3V, while output LOW is way down in a selectable ...
- 6,154
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1
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I2C Level Translator Question
In the I2C Voltage translation circuit below, does it matter which side (SDA1/SCL1 or SDA2/SCL2) is the master and which side is the slave?
- 841
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1
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How to connect a CD40109BE Voltage Level Shifter
I have a circuit requirement using a Texas Instrument CD40109BE Voltage Level Shifter. This chip incorporates 4 low to high level shifting circuits. I plan to use two of these circuits, A and B with ...
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1
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I2C level shifting to multiple voltages inside a BMS
We're building a BMS that has a micro on each cell in the pack.
I know this isn't standard and the issues that come with it, however the pack isn't a standard layout, and the benefits out weigh the ...
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3
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Level Translator for AVR and microSD
I want to connect a microSD card in my AVR ATMEGA32, through SPI, which its operate with 5V.
The microSD card i think that operates with 3.3V so, it is must to connected via bidirectinal level ...
- 2,013
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1
answer
129
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What if there's current INTO an output pin?
maybe my question is easy to answer and maybe I shouldn't have asked it, but I'm really not sure.
I would like to connect an XBee ZigBee module (3.3 V) to a microcontroller (PIC, 5V) using the USARTs....
- 202
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vote
1
answer
119
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Bi-directional voltage translation with ESD and EMI protection
I plan to use the following circuit connected to a ESP32 GPIO line which is 3.3V to control stepper driver and, if needed, serve as a digital input (0V/5V).
Diode is there for ESD protection and ...
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0
answers
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3.3V Logic to 12V Logic (Uni-directional and Bi-directional) [duplicate]
I'm looking to understand how to convert between 3.3V logic and 12V logic, in each direction individually and bidirectionally. I know this question has been asked before, but I'm overwhelmed with the ...
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Is it safe to use a bus buffer as level shifter?
I am currently using SN74ABT5402ADW as a buffer and level shifter for my ADC, however, the datasheet does not explicitly say that it can be used as a level shifter. I provide it with 5V power, but the ...
- 3,172
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Voltage Level Translation: LCD(5V) -> GTL2000 <-> MCU (3.3V)
I am trying to interface a micro-controller (LPC11C14) to a LCD. The LCD has Vih = 3.5V so I cannot directly connect the uC pin to the LCD. For this, I found a GTL2000 chip which looks like it might ...
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