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/1635478/iso7721-injection-currentSat, 11 Apr 2026 09:46:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:cc7979dd-b833-4d43-ab1b-4f39eabf574cKonrad HolzmannPart Number: ISO7721 Hello, we have some trobules with overvoltage situations on pins OUTA and INB. In our case we use a 3.3V protection diode on these pins, but in some situations we have device failures. In this case VCC1 and GND1 get shorted in the ISO7721. To do some further protection I need to know the maximum allowed current injected on OUTA and INB for e.g. 500ms. My idea, current runs into device, through protection diode to VCCI. VCCI gets a shunt referece to limit the voltage to e.g. 4.7V. Thanks! Regards KonradIndustrial AutomationISO7721https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634022/isousb211-schematic-review/6304609Sat, 11 Apr 2026 06:11:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1683318a-6568-44c7-a342-9ed65dcefd93Abhishek ManojHi Varun, Please find the updated schematics. e2e.ti.com/.../ISOUSB211DPR-USB-isolator.pdf The EQ pins provided pull up voltages are fine. Regards, Abhishekhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1635472/iso6742-q1-schematic-reviewSat, 11 Apr 2026 05:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:fc31898f-666a-4e71-a740-17bf5ac0c94bAbhishek ManojPart Number: ISO6742-Q1 Hi Team, I&#39;m using the isolator ISO6742QDWRQ1 in my board. Please find the attached schematics and provide the feedback. ISO6742QDWRQ1 - DIO isolator.pdf Regards, AbhishekISO6742-Q1https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1632678/iso6720-analysis-of-ic-behavior-changes-after-removing-iso6720bdr-input-signals/6304453Fri, 10 Apr 2026 21:44:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:9134e50e-da91-4d9f-bf1b-43d23a40fb15Koteshwar RaoHi Ike, Thanks for sharing the complete schematic. This helps me understand how ISO6720 is connected to PCH, EC and PSE. Although the schematic is useful, I am not clear on the functions of the following pins, INA / PWRGD_PS_PWROK1 related PCH_PWRGD_PS_PWROK1 PWR_BTN_BMC_OUT_N INB / PWRGD_PS_PWROK2 related PCH_PWRGD_PS_PWROK2 SYS_RST_BMC_OUT_N I don&#39;t know if these PCH and EC pins that are connected to INA &amp; INB are input pins or output pins. These pins could impact the status of logic or voltage at INA &amp; INB pins. Therefore, I would recommend looking into them for understanding the behavior. As stated earlier, INA &amp; INB pins are input pins for ISO6720 and the device doesn&#39;t control the status of these pins and instead, it only reads them and outputs to OUTA &amp; OUTB. You can verify this removing PCH and EC connections to ISO6720 and monitoring INA &amp; INB while disconnecting PSU and powering off PSU. Alternatively, you can use an evaluation module of ISO6720 and connect it to PSU and test to verify INA &amp; INB status. Let me know if ISO6720 device expected behavior is clear to you, thanks. Regards, Koteshwar Raohttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1635379/iso3082-the-iso3082-rxd-pin-outputs-an-abnormal-330-khz-waveformFri, 10 Apr 2026 14:53:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d1f7a421-6e7a-4f80-aa76-f55edcf98eecKelly Li2Part Number: ISO3082 The schematic for the ISO3082 is shown below. When its A and B lines are connected to the A and B pins of another 485 chip—even if that 485 chip is not powered—the ISO3082’s RXD pin outputs a waveform of approximately 330 kHz. Would please help me figure out how to fix this issue. Thank you.Industrial AutomationISO3082https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1633775/iso7240m-output-failure/6303778Fri, 10 Apr 2026 12:32:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b3d0b43d-80f8-4c87-94d7-b4f55f0dda15Varun KumarHi Ojima-san, Aaditya is Out of Office today. I have a reviewed the inputs and might have a possible explanation but to confirm that I need one data point from you. I need the zoomed-in transition waveform for 3.6V supply condition on Analog Side, like the one shared for 3.1V(like the two waveforms below) Can you please provide these waveforms for VCC1=3.6 as well? Also, there&#39;s an important observation that I want to bring out -&gt; The IN1 analog signal for supply VCC1 =3.1V and 3.6V is beyond the Absolute Maximum Ratings of the device. The abs max voltage rating for IN1 is 3.6V for VCC=3.1V, and 4.1V for VCC1=3.6V but according to the scope-shots, IN1 is being stressed till 5V! This can compromise the performance and reliability of the device and can also result in device damage if stressed frequently. Regards Varunhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634909/iso1540-iso1540-sda2-waveform-check/6303711Fri, 10 Apr 2026 11:30:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:912f0af6-e42c-457f-ad4f-7358591abaffVarun KumarHi Brian, The Diode is a pictorial representation of the internal IPs that maintain an offset voltage for VOL1. To understand why the offset voltage is needed in the first place, please refer this FAQ on our forum - (2) [FAQ] Why is the logic LOW level output voltage, VOL1, up to 0.8V on Side1 of the ISO1540/ISO1541 and ISO1640/ISO1641 bidirectional I2C isolators? - Isolation forum - Isolation - TI E2E support forums Regards Varunhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634721/iso7240m-regarding-the-iso7240m-on-the-ucc27714evm-551/6303634Fri, 10 Apr 2026 10:22:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b340a0f3-e83c-4f9c-9e56-ceb45055ff61KyoheiHi Varun-san, Thank you for your support. I have accepted your friend request, so could you please share the information with me via private message? Best regards, Kyoheihttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634721/iso7240m-regarding-the-iso7240m-on-the-ucc27714evm-551/6303573Fri, 10 Apr 2026 09:48:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:aa57abf2-a8c8-48f1-a9a8-7432320f975fVarun KumarHi Kyohei, You can go ahead with the pre-production samples for evaluation. Unfortunately, we cannot disclose these dates publicly. I can message you privately. Regards Varunhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634721/iso7240m-regarding-the-iso7240m-on-the-ucc27714evm-551/6303560Fri, 10 Apr 2026 09:41:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f2c67597-162a-48c5-9f4e-ea3b25d8f481KyoheiHi Varun-san, Thank you for your support. We understand that ISO6440 is a suitable device. It appears that samples are available; however, the product has not been officially released yet. Could you please advise when the release is scheduled? Best regards, Kyoheihttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1633775/iso7240m-output-failure/6303313Fri, 10 Apr 2026 06:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:53a9082a-9073-4ee7-a6dd-c48acd6243c3user3575569Dear Aaditya-san, Thank you for your prompt response. [quote userid=&quot;566985&quot; url=&quot;~/support/isolation-group/isolation/f/isolation-forum/1633775/iso7240m-output-failure/6299617&quot;]From my understanding, it seems that the output signal does not match the applied input signal, is this correct?[/quote] Yes, your understanding is correct. The output signal does not correctly match the applied input signal under the conditions we observed. Please refer to the attached file for a more infomation,Schematic and PCB Layout. We have not yet performed a unit swap. However, it is important to note that this issue is occurring across a large number of our boards and on multiple signal lines. Given the scale of the occurrence, it appears to be a consistent behavior rather than a defect in a specific single unit. We would appreciate it why this occurs and how we might resolve it. e2e.ti.com/.../ISO7240M_5F00_260410.pdf Best regards, Hideaki Ojimahttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1632678/iso6720-analysis-of-ic-behavior-changes-after-removing-iso6720bdr-input-signals/6303058Fri, 10 Apr 2026 02:11:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1ccbf748-094c-46e0-9904-259d6149e581Ike YangHi Koteshwar, The attachment contains the complete SCH. for the ISO6720 isolation IC. The ISO6720 is located at U85. thanks Regards, ike Yang e2e.ti.com/.../U85-isolation-IC-related-SCH.pdfhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1632678/iso6720-analysis-of-ic-behavior-changes-after-removing-iso6720bdr-input-signals/6302997Fri, 10 Apr 2026 00:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:dafdec27-c9a6-498b-b7a9-aeb4017ee150Koteshwar RaoHi Ike, Thanks for providing additional inputs. The absolute impedance values do not necessarily are important, the input logic status is what matters. Understood that PCH and EC GPIO pins are always connected to INA &amp; INB pins of ISO6720 in both PSU disconnect and power-off conditions. Please note that INA &amp; INB are input pins of ISO6720, the device is designed to read input pins and accordingly produce the output. It doesn&#39;t control the input pin status rather it just reads the input pin. Therefore, I expect the external components like PCH, EC, or PSU are responsible for the status of INA &amp; INB. If the OUTA &amp; OUTB do not match INA &amp; INB then I would consider that to be because of ISO6720 but if the INA &amp; INB logic levels are different from what you expect then that would be because of the outputs (like PCH, EC, PSU outputs) connected to INA &amp; INB pins. I can still review and provide better comments if you can share larger schematic showing ISO6720, PCH, EC and PSU. Please share the larger schematic for review, thanks. Regards, Koteshwar Raohttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634720/iso1640-isolated-i2c-via-isolator-ic-to-bq76972/6302355Thu, 09 Apr 2026 16:04:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ee1adaef-1b40-4661-b7c6-5e14f5c58320Varun KumarHi Nam, Thanks for reaching out and providing details. We have never encountered any issues with TIDA-010247. or any known obvious limitations with BQ76972 + Isolated I2C which we can share with In order to debug this issue, we will need to review the schematic and layout. Also, a top-level system block diagram connection showing how the buck converter is actually connected to the ISO1640 will really help us in understanding the issue better and hence provide the nest steps. Please make sure that supply decoupling capacitors are places no more than 2mm apart from VCCx pins and also the GNDx pins should not have any long traces before connecting to PCB ground. Regards Varunhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634895/sn74axc8t245-q1-need-level-translator-with-better-bandwidth/6302320Thu, 09 Apr 2026 15:43:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1b142154-dda7-401f-a8cc-016653fc00d3H JayarajWe are using it for debug trace. Please find the link for spec. Emulation and Trace Headers Technical Reference Manual (Rev. I)https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634895/sn74axc8t245-q1-need-level-translator-with-better-bandwidth/6302296Thu, 09 Apr 2026 15:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:55ed301c-062c-4750-be8c-b2242daeea01Jack GuanHello, What is the use case requiring &gt;400Mbps? There is the TXV0108 that is a direction controlled translator that supports tight timing for RGMII applications and &gt;400Mbps at this voltage node. e2e.ti.com/.../faq-how-can-i-estimate-data-rate-frequency-not-given-for-my-voltage-level – &lt; 750ps rise and fall time – &lt; &#177; 5 % duty cycle distortion – &lt; &#177; 400 ps channel to channel skew Regards, Jackhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634909/iso1540-iso1540-sda2-waveform-checkThu, 09 Apr 2026 14:50:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:89890bdd-c4c0-4ebc-912d-252c032256feBrian ChanPart Number: ISO1540 Hi Team base on my understanding for operation as below. SDA1 pull L -&gt; pass comparator C -&gt; NOT gate D (L -&gt; H) , MOSFET (L) -&gt; it will influence comparator(Schimitter trigger?) A and pull NOT gate B(L -&gt;H), so SDA 1 waveform won&#39;t see 0.75V vol. when SDA1 pull H , due to delay and need to open comparator , NOT gate will pull MOSFET to L, so we will 0.75V and pull high to 3.3V. (Fig1 ) Question :if my understanding is correct , another part pull SDA2 L to H why we can&#39;t see two stage waveform ? due to the diode? if so why we need to diode there (fig2 ) BRs BrianISO1641ISO1540ISO1541Data center &amp; enterprise computingISO1640https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634895/sn74axc8t245-q1-need-level-translator-with-better-bandwidthThu, 09 Apr 2026 14:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e10a78b2-6a53-4704-b10d-1113c0e729abH JayarajPart Number: SN74AXC8T245-Q1 Other Parts Discussed in Thread: TXV0108 I need to level translate from 1V8 to 3V3. SN74AXC8T245PWR supports upto 360Mbps. I need IC with better bandwidth, maybe more than 400Mbps. Do you have anything similar with dir control?TXV0108SN74AXC8T245-Q1https://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1630086/isow1412-failsafe-and-reccomendations/6301867Thu, 09 Apr 2026 10:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:5af41be8-f300-498f-bd0a-683f30d788a0Varun KumarHi Iance, If you ask me only about the idle bus failsafe levels of &gt;200mV, then the approach is pretty simple. Based on the tech article here -&gt; SSZTAK0 Technical article | TI.com , if you see equation (1) and (2), the RFS comes out to be 645Ohms. Hope this answers you question now. However, I don&#39;t completely understand how the idle failsafe level is the root cause of this odd behavior from the old sensor, but I also believe that you have done the analysis on your end. Regards Varunhttps://e2e.ti.com/support/isolation-group/isolation/f/isolation-forum/1634721/iso7240m-regarding-the-iso7240m-on-the-ucc27714evm-551/6301758Thu, 09 Apr 2026 08:50:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d32edea1-7937-4d00-9754-63c9d017577fVarun KumarHi Kyohei, We do have isolators in both the variants -&gt; default secondary side state being both high and low. You can use our latest digital isolator ISO6440 from ISO644x family - ISO6440 data sheet, product information and support | TI.com For default output state as LOW - &gt; ISO6440F is the right device to be used Regards Varun