This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: SN74LS240
SN74LS240NS shows hysteresis on the datasheet but it doesn't specify its threshold voltage.
Could you please provide each high→low and low→high threshold voltage?
The VIL or VIH are listed in the electrical characteristics section of the datasheet shown below.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Karan Kotadia:
Thanks for your quick reply.
In accordance to datasheet, it shows that hysteresis voltage is 0.4V(typ).
So I think there is actual threshold voltage for each Low→High/High→Low which should be VT+ − VT-−=0.4V.
Is it possible to provide the actual threshold voltage if you have?
In reply to Shota Mago:
The datasheet specifies the hysteresis, but not the absolute voltage of the thresholds. They can be anywhere between VIL and VIH.
In reply to Clemens Ladisch:
You should never be operating near the threshold voltages. The VIH and VIL specs I have given is what you should conform to when switching on the device. The hysteresis will help if the input signal has a slow rising or falling edge as the device will not falsely switch or oscillate at the output.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.