https://e2e.ti.com/support/isolation-group/isolation/<p style="display:none;">blank</p>en-USTelligent Community 13https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1691369/sn6507-sn6507-is-ilim-valid-at-vcc-3-3-v/6517068Wed, 21 Oct 2026 11:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a4db725d-180c-49a5-be60-46873ea752a8Prateek VermaHi Min, According to the datasheet, The ILIM works for 5V &lt; Vcc &lt; 36V. However, I am not sure if ILIM also works for 3V &lt; Vcc &lt; 5V. I will check this the design Team and will update here as soon as I receive the information. Thanks, Prateekhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1691369/sn6507-sn6507-is-ilim-valid-at-vcc-3-3-vWed, 21 Oct 2026 05:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:32d720c4-72ae-454f-b3f9-e835794c0edaMin-Sung KangPart Number: SN6507 Hi, I plan to run the SN6507 at VCC = 3.3 V with RILIM = 127 kohm (200 mA typ). The datasheet specifies ILIM only for 5 V &lt; VCC &lt; 36 V. Does the current limit work at 3.3 V with similar accuracy? If there is any data, please share it. Thanks.SN6507https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1687079/iso7740-spi-with-digital-isolator/6516688Wed, 21 Oct 2026 05:54:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6eb8cb11-2a16-44f0-b21b-c63b4d3443a4Ahmed MostafaHi Aaditya, Thanks for your response. Best Regards, Ahmed Mostafahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690909/iso1228-nrst-pin-function/6516664Wed, 21 Oct 2026 05:27:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d5e30a10-bb8a-4b99-a99f-ce1e2eb3d962Alexander SchartnerHi Justin, Thank you very much for your prompt reply. Best regards, Alexhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1687079/iso7740-spi-with-digital-isolator/6516657Wed, 21 Oct 2026 05:20:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c148fafb-035d-4e30-9f7a-09ded7a77951Aaditya V.Hi Ahmed, Thanks for the additional description. Can you please reattach the images you have provided? I will review and respond in the next 24 hours. Regards, Aadityahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690523/iso3086-external-current-at-visoout/6516324Tue, 20 Oct 2026 21:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:4fe0e113-b8c7-463b-aaba-550ae90107a6Koteshwar RaoHi, Thanks for clarifying the part number. Yes, 1mA of external load on VISOOUT should be fine. Thanks. Regards, Koteshwar Raohttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690909/iso1228-nrst-pin-function/6516289Tue, 20 Oct 2026 21:20:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0784d8c1-f5b6-477c-88df-28ef49dbed09Justin LewisHi Alex, See the following answers to your questions: 1) No. The nRST pin will force a reset of the ISO1228 SPI controller and the ISO1228 will maintain its previous configurations. 2) Yes. nRST needs to be asserted for a minimum of 35ns to allow a full reset of the SPI logic inside ISO1228. 3) No. nRST and nCS are functionally independent. nCS only follows nRST in the timing sequence. 4) Yes. COMM_SEL tied to VCC1 selects serial SPI mode , where pin 29 (OUT7/BURST_EN) acts as the burst-mode control input. Tying BURST_EN low selects non-burst SPI behavior; burst mode requires it to be high. Best regards, Justinhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690892/iso721m-ep-request-for-clarification-on-date-code-discrepancy-iso721mmdrep/6516100Tue, 20 Oct 2026 18:00:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:66fed793-a40d-4154-862c-fd689df8d31fEric HackettChulki, We will look into this and have a response by end of business 10/21/2026. Can you please provide the Sales Order or Delivery Note Number, and reattach the photographs? They aren&#39;t attached to your previous post. Regards, Eric Hacketthttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr/6515468Tue, 20 Oct 2026 06:00:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2ec090c7-bbd8-4c18-9c36-0b876f62ca01Aaditya V.Hi Sv, Thank you for your patience and sorry for the delay. [quote userid=&quot;593979&quot; url=&quot;~/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr&quot;]In this case what will the output of teh digital isolator when input is high impedance.[/quote] The output of the digital isolator is only 2-state, HIGH or LOW. So when the input of the digital isolator is high-impedance or no input, the output state would be default output. For the ISO6763DWR, the default state is HIGH. [quote userid=&quot;593979&quot; url=&quot;~/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr&quot;]So if this signal is high, will this effect the MISO signal of the slave 1?. Since it is wired AND logic for teh MISO signal in the non-isolated side, I belive the logic 0 will have more precedence[/quote] Yes, If the isolator drives MISO high while Slave 1 drives it low, the two push-pull outputs will conflict and may cause issues with communication. [quote userid=&quot;593979&quot; url=&quot;~/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr&quot;]What if we are using a default &#39;active low&#39; digital isolator insted of this?. Will this affect all the communication to the slave 1?.[/quote] Yes, this could also still affect performance. Even if the device is LOW, if MISO is driven HIGH while isolator input is not driven, then the LOW from digital isolator output and HIGH from the MISO line could conflict. The solution for this is to use a an isolator with an enable pin, such as the ISO6441. The ISO6441 or the ISO64xx device family are teh newest generation of digital isolator and also has an enable pin. The enable pin allows you to enable or disable the output. When the output is disabled, the output state would be high impedance. Another solution is the use a tri-state buffer in series with the isolator. This would also allow you to have a high-impedance output state. [quote userid=&quot;593979&quot; url=&quot;~/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr&quot;] Is it recommended to share the same SPI bus if a digital isolator is used in the same bus? [/quote] I believe you are asking if one slave can be isolated while the other one is not. Yes, this is possible and more of a requirement by your system. However, since there is a discrepancy between the output states of the peripheral device and isolator output, the above solutions will allow functionality. Regards, Aadityahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1687079/iso7740-spi-with-digital-isolator/6515461Tue, 20 Oct 2026 05:49:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3bef79cf-fe7e-4d13-9def-73891fda0c49Ahmed MostafaHi Aaditya, I&#39;m sorry for confusing. Please, look at the following block diagrams that represents what I want to tell you, which is after clock out from each isolator, should I: - Connect them together then enter the SPI Clock in ADC. - Connect only one of them to SPI Clock in ADC. Note that SPI in ADC is the slave device. I have also another solution, which is using two isolators, one is 6 channels ==&gt; (4 Forward, 2 Reverse) and another is 1 Channel. So, I will connect chip select on single channel isolator and other all signals (clk, Douts, Din) on 6 channels isolator. As chip select is the start of communication, clock depends on chip select not vice versa. I searched for those isolators: - ISO7710DR (1 Channel) - ISO7762DWR (6 Channel) (4 Forward, 2 Reverse) Please, open these figures for clarification. https://e2e.ti.com/resized-image/__size/640x480/__key/communityserver-components-multipleuploadfile… https://e2e.ti.com/resized-image/__size/640x480/__key/communityserver-components-multipleuploadfile… Best Regards, Ahmed Mostafahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1687079/iso7740-spi-with-digital-isolator/6515454Tue, 20 Oct 2026 05:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0c46df9e-bd1c-4720-a0ae-7fc9640ecf9dAhmed MostafaHi Aaditya, I&#39;m sorry for confusing, I will send to you the clarification about the problem I have. Best Regards, Ahmed Mostafahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690909/iso1228-nrst-pin-functionTue, 20 Oct 2026 02:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:20fe4721-964e-41fa-825a-51e8e6b390bfQi LiuPart Number: ISO1228 Hi team, here are a few questions regarding ISO1228: 1) Does activating the nRST pin reset the contents of the filter configuration registers? 2) Is it possible to reset the SPI interface before each access using the nRST pin? 3) Does the function of the nRST pin depend on the nCS pin? 4) Can the BURST_EN pin be connected directly to GND1 if the COMM_SEL pin is connected to VCC1? Many thanks in advance, AlexISO1228Applianceshttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690523/iso3086-external-current-at-visoout/6515301Tue, 20 Oct 2026 00:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5cd8f82f-b621-44af-afeb-99e3c7dde12duser4090349Hello You are right. XISOW3086PDWER is the correct PN. If VDD is 3.3V, i would like to use VISOOUT to provide the supply to other load. Not much current, 1mA is fine.https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690892/iso721m-ep-request-for-clarification-on-date-code-discrepancy-iso721mmdrepTue, 20 Oct 2026 00:34:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e5756f8b-868d-4651-9c1d-f40f0f41972fChulki AhnPart Number: ISO721M-EP We recently purchased and received the ISO721MMDREP component directly from Texas Instruments. During our incoming inspection, we identified a discrepancy between the date code indicated on the product packaging label and the date codes listed on the Certificate of Conformance (CoC). The details are as follows: Packaging Label Date Code: 2409+5 CoC Date Code: 2409+5, 2426 Quantity Received: 10 pcs The packaging label indicates only 2409+5 , whereas the CoC lists two date codes: 2409+5 and 2426 . Could you please clarify the reason for this discrepancy and confirm which date code(s) are applicable to the components we received? In particular, we would appreciate clarification on whether the CoC includes multiple manufacturing lots or whether the additional date code was included in error. If the CoC contains an incorrect date code, please provide a revised Certificate of Conformance reflecting the correct information. We have attached photographs of the packaging label and the CoC for your reference. Thank you for your assistance. We look forward to your clarification.ISO721M-EPhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690523/iso3086-external-current-at-visoout/6514705Mon, 19 Oct 2026 15:20:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:63d390ae-48d0-4928-9f83-5450170ce31eJustin LewisHi, Can you please clarify your question? ISO3086 does not have a VISOOUT pin. Perhaps you are referring to the driver/receiver outputs? Also, by &quot;extra&quot; current, do you mean the output current? Best regards, Justinhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1689006/iso6763-desiging-with-iso6763dwr/6514082Mon, 19 Oct 2026 04:15:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:6ea8055b-fe4b-4b90-b781-587768cdfd96SvHello team, Awaiting your replyhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1690523/iso3086-external-current-at-visooutMon, 19 Oct 2026 02:48:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2bef6f2b-0d66-4599-822c-8d962a3588bcuser4090349Part Number: ISO3086 Hello Can I have some extra current at VISOOUT when the primary is powered by 3.3V. I don&#39;t need a lot extra current, 1mA is fine.ISO3086https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1679862/isow1412-isow1412-radiated-emissions-with-two-devices-used-as-an-rs-485-repeater/6513457Fri, 16 Oct 2026 16:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:021898f9-b36d-487a-bfd4-4ed05d4ee1abEric HackettRudolf, We will email you directly and I&#39;ll close this thread for now. Regards, Eric Hacketthttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1679862/isow1412-isow1412-radiated-emissions-with-two-devices-used-as-an-rs-485-repeater/6512855Fri, 16 Oct 2026 06:44:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e009a534-97a3-482b-8fa2-692487e1d7ccRudolf DichlerYes, please contact me via my email address so that I can respond.https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1689617/sn6501-sn6501-excessive-inrush-current-during-startup/6512805Fri, 16 Oct 2026 05:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:057aade0-e3cb-4f5f-91d5-391d1c83ced4Prateek VermaHi, Yes, this is realistic. The SN6501 does not have internal soft-start or current-limiting features. During startup, the output capacitors act as a short circuit, causing high inrush currents. Mitigation Techniques: Limit Capacitance: Keep output capacitance within the recommended range ~(1uF - 5uF) Use LDO with low short-circuit current limit. Use SN6505: Switch to the SN6505, which includes a built-in soft-start feature to manage this exact issue. Thanks, Prateek