https://e2e.ti.com/support/logic-group/logic/Products covered in this section are Gates, Little Logic, and Speciality Logic. To post a question click New Post.en-USTelligent Community 13https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667234/txs0108e-q1-package-informationFri, 24 Jul 2026 06:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:dc878186-dfba-454e-ada2-1da610203f0dWilliam Lai(CFAE)Part Number: TXS0108E-Q1 Hi Team, Could you please kindly provide with the TXS0108EQWRKSRQ1 datasheet package information like the width, height, pitch adn error ( It's not in the datasheet like other package)? Thanks. Best Regards, William LaiTXS0108E-Q1https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666888/tps54340-tps54340ddar-design-changed/6427664Fri, 24 Jul 2026 01:15:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0baac668-14da-4be7-a726-602a78dde707Tak Lung ChanHello Thank you for your reply. Could you please kindly point out which part is mentioning the lead frame has changed in the PCN? Thank you. Best Regards Nolihttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667110/sn74ac08-problem-with-the-mpn-sn74ac08dr/6427488Thu, 23 Jul 2026 21:16:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:56f51b89-f070-49af-bc84-3b4621f5464eTane DiazHello Chris! Did Texas Instrument change in the construction of the material?https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1665767/sn74act14-sn74act14-inverter-circuit-failure/6427478Thu, 23 Jul 2026 20:59:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a5ca7697-e197-4523-96bb-d1b1392db21dMatthew KomitskyAre you able to confirm that each part of the circuit works independently? For example: Measure the signal coming from the optocoupler without the inverter connected. Then measure the behavior of the inverter when disconnected from the optocoupler.https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666888/tps54340-tps54340ddar-design-changed/6427370Thu, 23 Jul 2026 19:18:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:62ee1e6c-9db2-40d6-a78f-4b76d90eb691Frank De StasiHello Yes, there was a lead-frame change for this device. The PCN you have is the only document we can provide. Thankshttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667110/sn74ac08-problem-with-the-mpn-sn74ac08dr/6427264Thu, 23 Jul 2026 17:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a1dbaac8-9dd2-42be-bfe8-ddbbfd208cdaChris PuiHi Tane, 1. Top markings can vary depending on the assembly site. 2. If these parts were ordered from TI or an authorized retailer, if they were listed as SN74AC08DR then they are the same material. 3. Different assembly sites can have different top markings. Best, Chris Puihttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667091/tps54340-tps54340ddar-design-changed/6427176Thu, 23 Jul 2026 16:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1cc9bfcc-9b25-45d5-ac9d-c48c58045131Frank De StasiHello I will speak with our product engineers and get back to you as soon as possible. Thankshttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667110/sn74ac08-problem-with-the-mpn-sn74ac08drThu, 23 Jul 2026 16:11:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:7db10650-dd70-4a06-8368-d8a79460e5a4Tane DiazPart Number: SN74AC08 Hello Team Texas, we had a problem with a batch of material that was sent to us of the release B511006507G-4. We have these three types of materials. Our questions are: 1. What are the differences in the markings? 2. Are all three the same material? 3. Why are there differences in the markings? Thank you. Regards.SN74AC08https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1667091/tps54340-tps54340ddar-design-changedThu, 23 Jul 2026 15:07:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2ace5528-ade8-48f4-984b-d386b398f9feTak Lung ChanPart Number: TPS54340 Dear Sir/Madam Good day. We have recieved customer information about TPS54340DDAR. It seems there has a design change of TPS54340DDAR, since the marking and the structure of this item is totally different from original one we delivered. After my investigation, i found PCN#20230501000.1 was issued to mention about the marking changed. But in that PCN didnt mention that the structure will also changed. Could you please refer to the PCN which apply to the structure change? Thank you.TPS54340Enterprise machinehttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1665767/sn74act14-sn74act14-inverter-circuit-failure/6426557Thu, 23 Jul 2026 08:50:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a4c920c3-5883-47b7-9586-d9e920d703b8zhang weiWe tried removing the RC filter, but the fault still occurs. Oscilloscope attenuation: 10:1 A short input refers to giving a brief input at the front end of the optocoupler that can turn on the back end of the optocoupler. This input can last 500ms or 1s, both of which can cause the chip to fail. Also, this short input can saturate the optocoupler's phototransistor (the optocoupler's output). The input refers to pin 5 of chip U84C or pin 9 of U84D; The RC back end and the input are at the same place, pin 5 of chip U84C or pin 9 of U84D.https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666888/tps54340-tps54340ddar-design-changedThu, 23 Jul 2026 06:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:988ada3a-9544-43d7-ac9a-ba1e227f117dTak Lung ChanPart Number: TPS54340 Dear Sir/Madam Good day. We have recieved customer information about TPS54340DDAR. It seems there has a design change of TPS54340DDAR, since the marking and the structure of this item is totally different from original one we delivered. After my investigation, i found PCN#20230501000.1 was issued to mention about the marking changed. But in that PCN didnt mention that the structure will also changed. Could you please refer to the PCN which apply to the structure change? Thank you. Best Regards NoliTPS54340https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666023/sn74lv4t125-sn74lv4t125-difference-in-propagation-delay-between-channels/6425967Wed, 22 Jul 2026 21:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:261bc011-d593-429b-af0a-5b569aa6e645Yoshiyuki TokumitsuHi Josh, Thank you for the clarification. This answers my question. I understand that tSK represents the worst-case timing difference between the output channels. I will mark my question as resolved. I appreciate your support. Regards, Yoshiyuki Tokumitsuhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666628/txs0108e-txs0108ergyr-rise-time-issue/6425966Wed, 22 Jul 2026 21:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a9a038ef-d2d1-4325-badb-9b2bebb75565Jack GuanHi Jeno, The output Cload should be kept as low as possible to ensure parasitic capacitance is kept to a minimum. From the waveforms, it suggests that something is pulling the bus low/ preventing the output drivers (internal one shot) from reaching 1V8, which is usually related to excessive capacitances. To confirm if root cause, please disconnect the load from the output side to verify if output signals can achieve VCCA. Please provide the schematic for further review as well. Regards, Jackhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1665333/sn74lvc8t245-oe-dir-pullup-connections-suggestion-for-application-need/6425912Wed, 22 Jul 2026 20:49:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:028128e7-6f93-4175-8413-f35a88067cc3Joshua SalinasHello AG, Apologies for the delay. Does this chip is suitable for this application? Out of all devices you listed, SN74LVC8T245 will fit best for your application. What should be done with unused pin on i/p & o/p side Unused pins like Pin 4 and Pin 10 should be biased to a logic state (3.3V or tied directly to ground) Can DIR pin directly to VCCA? Yes DIR can be directly connected to VCCA Can /OE pin directly to GND? Yes /OE pin can be directly be connected to GND Regards, Joshhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666077/sn74ahc05-sn74ahc05-ibis-model-required/6425911Wed, 22 Jul 2026 20:49:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:92ab6436-24ea-4185-9487-0d298dc648b0Nikki DengelHi Vignesh, Please see attached IBIS model. Regards, Nikki e2e.ti.com/.../sn74ahc05.ibshttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1665333/sn74lvc8t245-oe-dir-pullup-connections-suggestion-for-application-need/6425858Wed, 22 Jul 2026 19:58:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:17601599-a84f-4100-ad2a-cd6bf9c171e9Jack GuanHi AG, We should have a response to you soon. Regards, Jackhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1665767/sn74act14-sn74act14-inverter-circuit-failure/6425683Wed, 22 Jul 2026 17:45:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b947f348-91e5-47e8-b849-7e178939a9e8Matthew Komitsky.https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666638/sn54s74-some-d-flipflop-not-latching/6425654Wed, 22 Jul 2026 17:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:da996eb3-4012-4cab-9c3b-3af4982f71acRobert WolfThanks for the information. The issue is not yet resolved but I need to do some more investigation before I proceed, Thank youhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666681/sn74act74-ep-sn74act74mdrep-nrnd-additional-information/6425583Wed, 22 Jul 2026 16:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:2ffae2d9-1414-4d67-9ad5-6a347367ea9dIan GrahamHi Winsbert, I can't comment on product lifecycle on the public forum apart from restating TI's lifecycle policy. I recommend you reach out to a TSR or FAE. We have no pin to pin replacement. Our best replacement is: www.ti.com/.../SN74LV2T74-EPhttps://e2e.ti.com/support/logic-group/logic/f/logic-forum/1666243/sn74lv125a-sn74lv125argy-nrnd/6425531Wed, 22 Jul 2026 15:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1cc16dd8-6bc4-4462-b224-fb288c813d15Matthew KomitskyHi Michael, It looks like a replacement. Please do double check any crucial specs though. -Matthew