https://community.nxp.com/t5/Other-NXP-Products/TJA1145A-Power-Sequence-Issue/m-p/1727491#M19346 <P>I don't think it will damage if VIO powered without Vbat and Vcc, but you need pay attention on the limited value once above this max 6V it will damage:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1695340949113.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/242108iF22B5C5574793127/image-size/medium?v=v2&amp;px=400" role="button" title="guoweisun_0-1695340949113.png" alt="guoweisun_0-1695340949113.png" /></span></P> <P>&nbsp;</P> Fri, 22 Sep 2023 00:02:54 GMT guoweisun 2023-09-22T00:02:54Z https://community.nxp.com/t5/Other-NXP-Products/TJA1145A-Power-Sequence-Issue/m-p/1724913#M19297 <P>Hello,</P><P>I am experiencing an issue when debugging a board using the TJA1145AT. Normal operation brings on VBAT before VCC or VIO, but I found when using a debugger for the microprocessor, VIO was powered via the debugger without VBAT and VCC powered. After this happens, the board stops working, and it seems like the TJA1145AT is damaged. I can still talk to the microprocessor via debugger (successful programming and reading out memories).</P><P>&nbsp;</P><P>Is it possible to damage the TJA1145AT if VIO is powered without VBAT and VCC?</P> Mon, 18 Sep 2023 18:59:14 GMT https://community.nxp.com/t5/Other-NXP-Products/TJA1145A-Power-Sequence-Issue/m-p/1724913#M19297 lmb_bruker 2023-09-18T18:59:14Z https://community.nxp.com/t5/Other-NXP-Products/TJA1145A-Power-Sequence-Issue/m-p/1727491#M19346 <P>I don't think it will damage if VIO powered without Vbat and Vcc, but you need pay attention on the limited value once above this max 6V it will damage:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="guoweisun_0-1695340949113.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/242108iF22B5C5574793127/image-size/medium?v=v2&amp;px=400" role="button" title="guoweisun_0-1695340949113.png" alt="guoweisun_0-1695340949113.png" /></span></P> <P>&nbsp;</P> Fri, 22 Sep 2023 00:02:54 GMT https://community.nxp.com/t5/Other-NXP-Products/TJA1145A-Power-Sequence-Issue/m-p/1727491#M19346 guoweisun 2023-09-22T00:02:54Z