逻辑论坛 - 最近的话题

RE: TXB0104: TXB0104串联阻抗问题

Vivian Gao — Thu, 04 Jun 2026 08:53:54 GMT

下方链接有过回复。

TXB0104: TXB0104 Source-series termination Recommendation? - Logic forum - Logic - TI E2E support forums

TXB0104: TXB0104串联阻抗问题

Guangfeng Wei — Thu, 04 Jun 2026 03:16:28 GMT

Part Number: TXB0104

TXB0104在a1a2a3a4b1b2b3b4 转换口串的电阻误贴成2k阻值调试测试过，经发现后改成47欧姆电阻，后来a1-a4没有输出了, 再换回2k电阻也没有输出，可能是什么原因？谢谢。

SN74CB3Q3257: SN74CB3Q3257结温疑问

?? ? — Sat, 30 May 2026 04:27:37 GMT

Part Number: SN74CB3Q3257

请问下SN74CB3Q3257的最大结温是多少？我看有的地方写85℃，有的地方写105℃。

RE: SN74CB3Q3257: SN74CB3Q3257结温疑问

Eirwen — Wed, 03 Jun 2026 00:28:14 GMT

请参考下面FAQ：

[FAQ] How to Calculate the Max Junction Temperature of an Analog Switch/Multiplexer. - Switches & multiplexers forum - Switches & multiplexers - TI E2E support forums

RE: SN74CB3Q3257: SN74CB3Q3257结温疑问

?? ? — Tue, 02 Jun 2026 03:02:38 GMT

请问有确认结果了吗

RE: SN74CB3Q3257: SN74CB3Q3257结温疑问

Eirwen — Mon, 01 Jun 2026 05:38:44 GMT

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

RE: SN74LVC1G08: 器件Tj温度寻求

Lydia — Fri, 29 May 2026 06:17:00 GMT

您好，数据手册第四页有具体数值，www.ti.com.cn/.../sn74lvc1g08.pdf

SN74LVC1G08: 器件Tj温度寻求

zhou wenqiang — Fri, 29 May 2026 06:01:12 GMT

Part Number: SN74LVC1G08

HI,

请帮忙给一下SN74LVC1G08DCKR 这个器件的Tj温度，以便我屏蔽热风险，谢谢。

SN74HC14: SN74HC14 的input电压高于VCC电压

zhang xinyu — Tue, 26 May 2026 08:58:37 GMT

Part Number: SN74HC14

你好：我们是SN74HC14, INPUT信号的高电平是5V，VCC供电电压是3.3V，请问是否可以？HC14的的输入INPUT到VCC的二极管作用是什么？为什么要这个二极管？

RE: SN74HC14: SN74HC14 的input电压高于VCC电压

Eirwen — Thu, 28 May 2026 07:16:41 GMT

请参考下面FAQ：

(1) [FAQ] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)? - Logic forum - Logic - TI E2E support forums

RE: SN74HC14: SN74HC14 的input电压高于VCC电压

Eirwen — Thu, 28 May 2026 07:15:25 GMT

请参考下面FAQ：

(1) [FAQ] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)? - Logic forum - Logic - TI E2E support forums

RE: SN74LV595A: X-RAY内部不一致

Links — Tue, 26 May 2026 09:59:12 GMT

TI 论坛旨在解决客户在使用TI产品过程中遇到的技术问题。请按照以下方式联系客户支持部门，会有客服为您提供帮助。

打开链接https://ticsc.service-now.com/csm
点击“申请新的支持”下面的“提交申请”按钮

SN74LV595A: X-RAY内部不一致

Andy Cai — Tue, 26 May 2026 09:52:31 GMT

Part Number: SN74LV595A

TI的料号会因为年份产地这些导致X-RAY不一样吗？有PCN吗？具体料号SN74LV595APWR

RE: SN74HC14: SN74HC14 的input电压高于VCC电压

Eirwen — Tue, 26 May 2026 09:01:26 GMT

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

RE: SN74AVC4T774: SN74AXC4T774 和SN74AVC4T774软件无法兼容

Eirwen — Tue, 26 May 2026 03:38:39 GMT

感谢您对TI产品的关注！关于您的咨询，我看您在英文E2E与我们的工程师Josh在沟通。那这边的帖子我就关闭了。有疑问请继续与Josh直接沟通：

(1) SN74AXC4T774: SN74AXC4T774 & SN74AVC4T774 - Logic forum - Logic - TI E2E support forums

SN74AVC4T774: SN74AXC4T774 和SN74AVC4T774软件无法兼容

switch — Wed, 20 May 2026 12:42:46 GMT

Part Number: SN74AVC4T774

Hi ti team，

新项目调试时遇到SN74AXC4T774 和SN74AVC4T774软件兼容问题，你能帮忙看下原因吗？附件是SN74AXC4T774 和SN74AVC4T774使用过程问题汇总，Thanks！

关于SN74AXC4T774 和SN74AVC4T774芯片使用兼容性问题汇总.docx

SN74HCS573-Q1: 需要该器件的封装规格信息

haiyou xie — Fri, 22 May 2026 07:32:20 GMT

Part Number: SN74HCS573-Q1

官网上只找到这器件的3D模型，找不到书面上的规格信息。

RE: SN74HCS573-Q1: 需要该器件的封装规格信息

Lydia — Fri, 22 May 2026 07:38:26 GMT

您好，

请参考e2echina.ti.com/.../VQFN-Package-Info-_2800_1_2900_.pdf

RE: SN74HC14: SN74HC14的输入信号高电平比VCC高

Lydia — Thu, 21 May 2026 23:53:26 GMT

您好，新问题请重新再发一个帖子谢谢

SN74HC14: SN74HC14的输入信号高电平比VCC高

zhang xinyu — Thu, 21 May 2026 02:56:26 GMT

Part Number: SN74HC14

你好：我们是SN74HC14, INPUT信号的高电平是5V，VCC供电电压是3.3V，请问是否可以？如果不可以直接这样用，那么在输入信号串联一个电阻，是否可以? 如果串联电阻，串联的电阻要多大？

RE: SN74HC14: SN74HC14的输入信号高电平比VCC高

zhang xinyu — Thu, 21 May 2026 12:04:57 GMT

你好，感谢。麻烦再问下，为什么HC的逻辑VI输入到VCC有这个二极管？这个二极管的作用是什么？

RE: SN74HC14: SN74HC14的输入信号高电平比VCC高

Lydia — Thu, 21 May 2026 03:21:45 GMT

您好，

请参考此FAQ[FAQ] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)? - Logic forum - Logic - TI E2E support forums

RE: SN74AVC4T774: SN74AXC4T774 和SN74AVC4T774软件无法兼容

Taylor — Wed, 20 May 2026 22:44:42 GMT

您好，

已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

SN74LVTH2245: hip output malfuntion

jia ri — Wed, 13 May 2026 09:21:20 GMT

Part Number: SN74LVTH2245

SN74LVTH2245PWR The 7th pin of the chip has normal high/lowlevel input fluctuation，while the 13th pin output is stuck at high level。The function returns to normal after power reset。Please analyze the possible root causes of this failure and the types of interference that may lead to this issue

RE: SN74LVTH2245: hip output malfuntion

Vivian Gao — Thu, 14 May 2026 06:21:53 GMT

You need to follow the recommended operating conditions section of the datasheet and meet the parameter requirements listed there. In addition, please check whether your system has transient high voltage or large current interference.

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