Questions tagged [level-translation]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0
votes
1answer
35 views

Single chip level shifter from LVCMOS to 12 V

I'm working on a nixie clock based on a STM32L476RG microcontroller and HV5530 chips. The microcontroller uses 3.3 V logic while the HV5530 really needs 12 V logic, which is a pain to implement. There ...
0
votes
5answers
474 views

Sharpening rise and fall time of square wave

I have designed a custom PCB using SN74LVCT145. The board is providing desired results up to 4MHz of frequency. From 5MHz to 20MHz the output waveform is not as desired. Edit 4: Can someone suggest ...
1
vote
3answers
64 views

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 ...
0
votes
0answers
35 views

Vias in the Input and output path

I have designed a custom level translator using SN74LVC1T45. I have placed chips on top and bottom to reduce the board size and because of this, I have used vias for the input and outputs for the ...
0
votes
1answer
41 views

Impedance matching for custom level translator board

I have designed a custom board using SN74LVC1T45. I have followed the schematic of EVM and added few 150R resistors at input and output for reducing the ringing effect. The custom board will be ...
0
votes
0answers
55 views

Stepping Down Logic Level of a Differential Signal

simulate this circuit – Schematic created using CircuitLab Suppose I have a unipolar, differential 24V signal, and I want to step it down for use with a 5V differential receiver (such as RS-422)...
0
votes
0answers
33 views

Significant noise observed on channels of TXB0108

We're working with a ADC chip test setup that uses the TXDB0108 to step up 1.8V data lines to 2.5V that are connected to Kintex7 FPGA. The pin-out is as follows: VCCA is 1.8V, while VCCB is on a 2....
1
vote
2answers
123 views

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 ...
1
vote
0answers
59 views

Interfacing LVDS into LVPECL with DC coupling

We are using TI ADC ADC12DJ3200 in our design. Now this ADC has input pins for timestamping the ADC data. This timestamp input supports LVPECL standard but the allowed common mode voltage is only 0....
1
vote
3answers
137 views

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 ...
1
vote
2answers
109 views

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 ...
0
votes
0answers
59 views

Output impedance matching for SN74lvc1t45

We are using SN74LVC1T45 IC for level translation and we are feeding translated voltage through BNC connectors (75 ohms) to other peripherals, during this we want to achieve impedance matching of 75 ...
0
votes
1answer
85 views

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 ...
0
votes
1answer
39 views

Fixing incorrectly routed TXB0108

I have a PCB with incorrectly connected TXB0108 (TSSOP20), VCCa 3V3 > VCCb 1V8, that I wanted to use for UART communication between two ICs. I'm looking into various options for fixing it. Here's the ...
0
votes
1answer
156 views

Using a Dual Bidirectional I2C Bus Voltage-Level Translator

I have a module that uses this ADC powered with 3.3V (MCP3422): Datasheet Now I would like to communicate with it over I2C using an Arduino Mega. The problem is that the Arduino's I2C is operating on ...
1
vote
2answers
98 views

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 ...
1
vote
2answers
117 views

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 ...
0
votes
1answer
72 views

LVPECL termination impedance

I'm designing a level converter PCB using a LVPECL driver (ADCMP573) and a LVPECL-to-LVTTL translator (SY89323L). I'm reading a document about LVPECL termination schemes and there's something unclear ...
0
votes
3answers
129 views

Fast voltage translation from 3.3v to 5.7v

I need to translate a 3.3v signal to 5.7v with transition of around 60ns or less. Voltage translators such as the TXS0101 usually specify the logic high level for the input as VDD x ~0.65 (= 3.7v in ...
-1
votes
1answer
99 views

Active analog attenuation with OPA2340

I wish to have active analog attenuation circuit. Following this page, I got myself some OPA2340. I use the B-side to keep the numbering somewhat intact. I go with the design on Figure 16-2 (p. 14/...
0
votes
1answer
49 views

Convert Oscillator output voltage level

I have a circuit of a USB chip (USB hub) with a custom external 24MHz oscillator. This oscillator have a max 3Vpp and the chip max voltage for XI is 2.45 with 1.8 recommended voltage. What are the ...
0
votes
1answer
89 views

Latching control via active-high battery supply / regulator shutdown pin?

I'm looking to supply an MCU (3.3 V) from battery via voltage regulator: a pushbutton should enable the supply, the MCU then should keep the supply enabled until it wants to shut itself down. But the ...
1
vote
5answers
284 views

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 ...
2
votes
1answer
2k views

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 ...
1
vote
0answers
2k views

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 ...
2
votes
2answers
127 views

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 ...
0
votes
1answer
139 views

general electrical question (with regards to the LBO pin on the Adafruit boost 500 lipo board to a Raspberry Pi)

So I was getting ready to follow this suggestion Do bi-directional level converters connect either input directly to ground? In order to pull the LBO pin to my GPIO on my RPi to shut down my Pi if my ...
1
vote
3answers
6k views

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 ...
2
votes
2answers
2k views

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. ...
0
votes
3answers
440 views

Proper (low power) use of a tri-state buffer when used as level shifter.

In my application, I have a 3.3v MCU driving a logic line based device at 4-5V where I need to be able to put the level shifter in a high impedance state. (This is particularly important to avoid ...
0
votes
1answer
49 views

Translating a signal to lower voltage

I'm only a hobbyist, so there is probably an obvious/better solution that i am simply unaware of. Project description: I'm trying to build a quiet linear power supply to power a mini DSP that can be ...
1
vote
1answer
74 views

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?
1
vote
2answers
2k views

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 ...
1
vote
1answer
2k views

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 ...
-4
votes
1answer
166 views

level translator IC for SPI [closed]

In my current project I am working on the scheme and need a IC with following requirements: - It has to be a lever translator from 2.2V to 3.3V; - It has 5 channels; - on 2.2V side It has 3 ...
0
votes
1answer
896 views

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 ...
0
votes
1answer
131 views

Need a level shifter, is there an IC which does what I want?

I need to change 3 signals (I1,2,3) which will be at around 2V to get shifted to 5V (in one direction only to O1,2,3). This schematic should do the job, but does anyone know if: a) there's a better ...
0
votes
1answer
864 views

Multiple SPI devices with different logic levels

I'm going to use one of the PIC32MX795F512L SPI peripherals (master), 1 to 4MHz, to communicate with multiple devices (slaves): Wi-Fi module MRF24WG0MA (3.3V); uSD card (3.3V); 9 modules with sensors ...
2
votes
0answers
113 views

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 ...
1
vote
1answer
605 views

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 ...
0
votes
1answer
395 views

Do I need a level shifter with an open drain output

I'm currently doing a schematic that has an IC that operates at 3.3V (HDC1000 for those curious), and the rest of my digital operates at 1.8V. I have a level shifter for the I2C lines, but there is an ...
0
votes
2answers
3k views

Voltage translation: 5V to 3.3V analog

I need to translate 0-5V analog signal from CASR 50-NP to 0-3.3V analog signal for the MCU's ADC. I came along Microchip's tip #16 solution. Is this a good practice? Can someone verify my design?
2
votes
4answers
160 views

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
votes
1answer
340 views

How to shift level of my AC signal compared to another AC signal? [closed]

I want to shift my AC signal level. i have a floating point in my circuit (SINE wave 1 with high amplitude around 350v) which is always changing. on the other hand i have another signal (SINE wave2 ...
0
votes
2answers
679 views

Is noise a problem when using a logic level shifter?

Good morning everyone, I'm building a device that uses several bidirectional logic level translators to interface 3.3V microcontroller to 5V, 2.5V and 1.8V sensors (via I2C lines). But I wonder if ...
0
votes
1answer
112 views

Where do voltage level limitations of logic level translators come from?

When browsing through available bidirectional level translator ICs, I always see the condition that reference voltage on one side of the translator must be strictly less than voltage on the other side....
0
votes
2answers
159 views

Overcoming the logic level translator limitations

Good morning everyone, I have a STM32F407 microcontroller running on 3.3V logic level, and I have a plethora of peripherals that I want to connect to it. The problem is that these peripherals run at ...
1
vote
3answers
794 views

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) ...
0
votes
2answers
187 views

Level shifting 8 output IO Expander from 0V-5V to -2.3V to +2.3V

I have a circuit problem that I'm trying to find a solution for. I have an 8 output IO expander which outputs 0V-5V. It is running analog switches which have a Vdd and Vss of +-2.3V. Using the 5V ...
3
votes
3answers
2k views

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 ...