Have any questions about a logic or translation device? Visit our Logic and Translation FAQ page.
…Have any questions about a logic or translation device? Visit our Logic and Translation FAQ page.
…Hi Prasenjit,
Yes - the device can have a 5V supply and 3.3V input or 5V input -- or any combination of those. This is the primary purpose of the LV1T family of logic and is defined in the datasheet pretty clearly.
In the Recommended Operating Conditions…
TI team,
Kindly note that this query is very very urgent, as I have a fabout by next week.
For this part, can we connect pin A to 5V, Vcc to 5V, but drive the OE pin with 3.3V compatible logic?
We are planning to drive OE pin from 3.3V bank of FPGA.
Output pin we will connect it to 5V logic circuit.
Please check and…
The SN74AUC1G126 is much faster and stronger at 1.8 V. (But it does not support 3.3 V at the output.)
Hi, Team
Our customer using our SN74LV1T126 as the Oscillator buffer, they using 2 pcs SN74LV1T126, one is for 3.3V, the other is 1.8V.
the 3.3V device have no problem, but the 1.8V…
When VCC is at GND, the B output will have high impedance. So this will work.
A more obvious (and cheaper) solution would be to connect the data line to the OE input of the SN74LV1T126.
Where did you get that number from? At 1.8 V, max. tpd is 14 ns, which corresponds to a 35 MHz square wave.
Anyway, for unidirectional downtranslation, you can use any buffer with overvoltage-tolerant inputs, e.g., SN74AUC1G17 with 250 MHz at 1.8 V.
Hi, Team
My customer needs to select a Level Shifter for the clock signal. Clock Fsw=24.768MHz. the signal is unidirectional, and needs to transfer from 3.3V input to 1.8V output. I…
Its like a serial communication, i will put a decoupling cap, thank you for your answers.
Regards.
Look OK. There should be a decoupling capacitor near each chip to prevent supply voltage dips when switching. Are you going to use PWM?
Could you check if im doing right the leveling up from 3.3 to 5? please if i need resistors or cap, tell me, thank you:
How many signals?
The SN74LV1T126 does what you want. The LSF requires pull-up resistors that must be correctly sized for the desired frequency.
Hi:
I´m interested to aply a level shifter to a rgb adressable strip control, it has the next atributes and i want to understand better the component to use:
-VCC of 5 Volts
-Vin (data input) 0.7VCC (3.5V minimum ti have…
Hi Richard,
I just want to confirm that you're using the Behavioral Spice Model from the SN74LV1T126 product folder, once you have that downloaded, please see the below FAQ. I've also went ahead and attached a test bench file with the circuit loaded in…
Hello,
I need help with SN74LV1T126 SPICE Model.
I tried to import this file in TINA, but it does not work.
During the import process, TINA asked me to choose one of the three components:
SN74LV1T126
SN74LV1T126_S1
SN74LV1T126_BUF
Hi AH,
Can you clarify on why this value is important for you? Usually only the worst case maximum propagation delay is of most importance as this will cause the most problems in a design.
Since this device does not spec a min tpd across temperature,…
Hi team,
Can you provide data on the minimum propagation delay time for VCC = 3.3V, across temperature?
Thanks,
AH
Hi,
Yes, all inputs on this device are over-voltage tolerant which allow this device to down translate from 3.3V to 1.8V. The OE pin is an input and so it can also be powered by any voltage greater than the supply voltage up to the recommended max of…
Our application would be required to have this buffer on the I/O sides, switching logic from 3.3V to 1.8V with 5V input tolerance. By taking a look of this buffer, it should be powered by 1.8V as below. It would be required to…
The worst-case voltage drop would be 90 Ω × 2 mA = 0.18 V or 90 Ω × 4 mA = 0.36 V. (The typcial voltage drop is smaller.)
Thanks you for your quick reply.
i have a question.
We need ICC around 2mA or 4mA.
How many volts do you guess VOUT will be under these conditions?
Best Regards, BANE
The output transistors are MOSFETs and behave like resistors, i.e., VOH depends on the output current. The VOH specification shows that the worst-case resistance is about 90 Ω.
What is the output current?
We used IC under the following conditions.
Why does this IC drop voltage?
I thought I would do vCC level OUTPUT. Can you explain the mechanism?
Input : 1.8V
VCC :3.36V
output:約3.12V
There is no other level shifter with the same pinout.
You have to use a direction-controlled translator.
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