# Asking about the response time of the LED **URL:** \ **Category:** Q&A\ **Created:** [March 2, 2025, 4:53am UTC](https://forum.digikey.com/t/asking-about-the-response-time-of-the-led/52325 "2025-03-02T04:53:26Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sfoong002](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@sfoong002](https://forum.digikey.com/u/sfoong002)\ **Post date:** [March 2, 2025, 4:53am UTC](https://forum.digikey.com/t/asking-about-the-response-time-of-the-led/52325/1 "2025-03-02T04:53:26Z")
Hi, I would like to know the specific value of the response time of the LZ1-00UBN0 LED according to the data sheet provided by the manufacturer. What is the rise time and fall time of this LED, these will be the best values to calculate the maximum operating frequency. Thank you! ---
**Author:** ![Karl\_1696](https://avatars.discourse-cdn.com/v4/letter/k/9de0a6/32.png) [@Karl\_1696](https://forum.digikey.com/u/Karl_1696)\ **Post date:** [March 3, 2025, 3:26pm UTC](https://forum.digikey.com/t/asking-about-the-response-time-of-the-led/52325/2 "2025-03-03T15:26:47Z")
Checking on this now. Will let you know when I have an answer. ---
**Author:** ![rick\_1976](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/rick_1976/32/1571_2.png) [@rick\_1976](https://forum.digikey.com/u/rick_1976)\ **Post date:** [March 4, 2025, 3:37pm UTC](https://forum.digikey.com/t/asking-about-the-response-time-of-the-led/52325/3 "2025-03-04T15:37:59Z")
Closing post due to repeated inquiries on the same topic. Please consolidate any further correspondence on the matter under the latest inquiry at the post below. > [@Help with LED response time](https://forum.digikey.com/t/help-with-led-response-time/52375): > > Hi all, I’m currently designing a circuit using the LZ1-00UBN0 LED. To accurately determine the maximum frequency at which I can drive it, I need to know its rise and fall times. I’ve looked through the datasheet but haven’t found those specific values. Does anyone have this information or know where I could find it? Any help would be greatly appreciated! ---
**Author:** ![rick\_1976](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/rick_1976/32/1571_2.png) [@rick\_1976](https://forum.digikey.com/u/rick_1976)\ **Post date:** [March 4, 2025, 3:38pm UTC](https://forum.digikey.com/t/asking-about-the-response-time-of-the-led/52325/4 "2025-03-04T15:38:04Z")
Closed on March 4, 2025, 3:38pm UTC