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Topics - ROSELJR

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Open Chat / What does last letter stand for?
« on: February 09, 2022, 10:27:14 PM »
What does the last letter of the button battery CR2450B and CR2450N stand for?
Details of CR2450: https://www.utmel.com/productdetail/fdkamericaincamemberoffujitsugroup-cr2450-4756792

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Open Chat / QFN package need to be grounded?
« on: January 13, 2022, 09:28:11 PM »
Do the thermal pads of TI's QFN packaged chips need to be grounded?
Introduction of QFN package: https://www.utmel.com/blog/categories/integrated%20circuit/the-introduction-to-qfn-package

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Electronic connection / What is the turn-on voltage of the diode?
« on: December 21, 2021, 10:01:27 PM »
What is the turn-on voltage of the diode when the input of PC817 is turned on? What is the turn-on voltage of the phototransistor when the output of PC817 is turned on?
Introduction of PC817:https://www.utmel.com/components/pc817-photocoupler-application-pinout-and-datasheet?id=296

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