接口论坛 - 最近的话题

TCAN1043A-Q1: TCAN1043A TIMING

cao lelian — Fri, 18 Sep 2026 07:44:02 GMT

Part Number: TCAN1043A-Q1

Hi team,

我们在测试TCAN1043ADMTRQ1R transceiver timing时（原理图如下图1），发现tpHR（传播延迟时间，TXD 高电平到驱动器隐性）为80ns以上，接近datasheet最大值90ns，如下图2。tF （差分输出信号下降时间）为70ns，超过datasheet典型值50ns ，如下图3。请问这tpHR主要与什么设计相关呢？下降时间tF有没有最大值要求呢？

测试setup为，板端CAN transceiver通过CAN总线连接到另一CAN节点（带120欧姆终端电阻）。板端CAN H和CAN L之间有120欧姆，另一个CAN节点的CAN H和CAN L之间有120欧姆，并联60欧姆，RL=60ohm。

谢谢。

图1：

图2：

图3：

RE: TCAN1043A-Q1: TCAN1043A TIMING

Vivian Gao — Fri, 18 Sep 2026 07:59:23 GMT

感谢您关注TI产品。我们正在核实您的问题，请耐心等待我们的回复。

TCAN1145-Q1: TCAN1145在欠压下的表现

zhang jiuqing — Fri, 18 Sep 2026 03:02:07 GMT

Part Number: TCAN1145-Q1

在我们的应用，控制器休眠后，VB保持供电，VCC&VIO掉电，当CAN网络报文触发INH唤醒时，偶发电源没上电成果，请问

1>此时INH保持高，在VCC欠压超过Tuv芯片会切换sleep模式，此时INH再次经历一次低到高的切换

2>如果控制仍然没有上电成功下，VCC保持欠压，芯片还会再次进入sleep模式么？

VCC欠压触发进入sleep模式是一次性的，还是在VCC掉电，INH为高的情况下重复发生

RE: TCAN1145-Q1: TCAN1145在欠压下的表现

Vivian Gao — Fri, 18 Sep 2026 03:34:21 GMT

感谢您关注TI产品。我们正在核实您的问题，请耐心等待我们的回复。

DP83849I: 启用DP83849的IAuto‑Negotiation功能的AN_EN引脚是否可以悬空？

Zone DM — Thu, 17 Sep 2026 00:43:55 GMT

Part Number: DP83849I

您好，

想咨询一下，我们目前是关闭了Auto‑Negotiation功能的状态，即AN_EN只通过2.2kΩ电阻连接到GND，没有连接其他电路。但是现在，我想实现打开自动协商Auto‑Negotiation功能，请问可以不通过2.2kΩ上拉电平，直接让AN_EN悬空的方式来实现吗？

RE: DP83849I: 启用DP83849的IAuto‑Negotiation功能的AN_EN引脚是否可以悬空？

Vivian Gao — Fri, 18 Sep 2026 02:46:54 GMT

AN_EN从"2.2kΩ下拉GND"改为"悬空"，即可依靠内部弱上拉实现Auto-Negotiation Enable.

评估板电路加了上拉电阻，目的是增强抗干扰能力。

功能上都可以实现，区别在抗干扰能力上。

评估板原理图如下

www.ti.com.cn/.../snlr002.pdf

TCA9535: TCA9535: TCA9535PWR-- Lead Color Change Observed After Reflow Soldering

user4727740 — Thu, 17 Sep 2026 08:34:53 GMT

Part Number: TCA9535

I have provided feedback on the TCA9535PWR， A problem has occurred in PB: during the reflow soldering process, the component leads change color(Turning black and dark) from their original plating color...

Please refer to the picture below!

May I ask why? Is it normal?

RE: TCA9535: TCA9535: TCA9535PWR-- Lead Color Change Observed After Reflow Soldering

Links — Thu, 17 Sep 2026 09:14:32 GMT

Hi,

Kindly reach out CSC team to get support

https://www.ti.com/customer-support/request-form

RE: DP83849I: 启用DP83849的IAuto‑Negotiation功能的AN_EN引脚是否可以悬空？

Vivian Gao — Thu, 17 Sep 2026 01:08:29 GMT

感谢您关注TI产品。我们正在核实您的问题，请耐心等待我们的回复。

RE: PCA9544A: PCA9544A： Request to get the SI model

Alice — Wed, 16 Sep 2026 23:29:37 GMT

您好，

在芯片产品网页上发布了PCA9544A IBIS Model

PCA9544A 数据表、产品信息和支持 | 德州仪器 TI.com.cn

PCA9544A: PCA9544A： Request to get the SI model

Chance Zhan — Tue, 15 Sep 2026 06:27:46 GMT

Part Number: PCA9544A

The client asked us to provide the corresponding SI simulation results. Please help us generate them so we can pass them on to the client.

TPS65994AD: 請幫忙review 線路

Charon Su — Tue, 15 Sep 2026 07:35:33 GMT

Part Number: TPS65994AD

PD_MB.pdf PD_DB.pdf

專案用到TPS66993,請幫忙review 線路

RE: TPS65994AD: 請幫忙review 線路

FRANK1 — Tue, 15 Sep 2026 07:38:40 GMT

感谢您对TI产品的关注！
关于你的咨询，我们正在确认您的问题，感谢您的耐心等待。

RE: PCA9544A: PCA9544A： Request to get the SI model

FRANK1 — Tue, 15 Sep 2026 06:44:49 GMT

Thank you for contacting TI China E2E forum and choosing our products as part of your solution.
Regarding your query, please give us some time to confirm this issue.

RE: DS160PR410: DS160PR410 setting diff. value digital eye variation

FRANK1 — Tue, 15 Sep 2026 06:11:38 GMT

Thank you for contacting TI China E2E forum and choosing our products as part of your solution. Regarding your query, please give us some time to confirm this issue.

DS160PR410: DS160PR410 setting diff. value digital eye variation

chaoqiang chen — Tue, 15 Sep 2026 06:06:09 GMT

Part Number: DS160PR410

Hi, Team

Currently, the overall system signal link is shown in the diagram. The sensor transmits data back to the FPGA at 16 Gbps via the DS160PR410. The FPGA uses Xilinx digital eye diagram IP core for testing. The current test results show that when the value is set to different values, the processing results of the digital eye diagram exhibit inconsistent passband flatness between the left and right half-regions. What could be the possible causes?

RE: DS160PR410: DS160PR410 setting diff. value digital eye variation

Daniel — Tue, 15 Sep 2026 06:10:56 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

RE: DS90UB9722-Q1: 资料申请过期

Vivian Gao — Tue, 15 Sep 2026 04:26:29 GMT

我们建议您联系TI客服中心咨询。

或者您让您的同事用他的公司邮箱注册的TI账号申请一下。

DS90UB9722-Q1: 资料申请过期

jim liu — Mon, 14 Sep 2026 08:38:48 GMT

Part Number: DS90UB9722-Q1

TI团队你们好：

我这边在上周申请了DS90UB9722-Q1的资料，这边显示也申请通过了，可能是因为我没有及时查看好像已经过期了，这边重新发起申请也没有显示进度，我如何才能再次获得资料查看权限呢？

以上，谢谢

DS160PT801: DS160PT801ACBR Complete Data Sheet

minpeng wang — Mon, 14 Sep 2026 09:03:40 GMT

Part Number: DS160PT801

DS160PT801ACBR Complete Data Sheet

RE: DS160PT801: DS160PT801ACBR Complete Data Sheet

Eirwen — Mon, 14 Sep 2026 23:07:50 GMT

请通过下面链接申请：

www.ti.com/.../DS160PT801-DESIGN

RE: DS160PT801: DS160PT801ACBR Complete Data Sheet

Daniel — Mon, 14 Sep 2026 09:25:12 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

RE: DS90UB9722-Q1: 资料申请过期

Daniel — Mon, 14 Sep 2026 09:24:43 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

DS160PT801: DS160PT801ACBR Complete Data Sheet

minpeng wang — Mon, 14 Sep 2026 09:02:14 GMT

Part Number: DS160PT801

DS160PT801ACBR Complete Data Sheet

DP83848K: Solutions for DP83848 Connection Disconnection

rong fan — Wed, 09 Sep 2026 10:55:31 GMT

Part Number: DP83848K

hello，
    Our product utilizes a GD32 microcontroller and a DP83848 PHY to implement Ethernet functionality. 
During electromagnetic interference (EMI) immunity testing, the network connection drops; simply unplugging 
and reconnecting the Ethernet cable fails to restore the link, whereas power-cycling the device does restore 
communication. The questions are: 
(1) How can communication anomalies (such as connection loss) with the DP83848 be detected by microcontroller? 
(2) How can the microcontroller restore communication via software after a DP83848 communication anomaly occurs, without power-cycling the device?
(3) What hardware measures can be implemented to enhance interference immunity?
    thanks!