TUSB211-Q1: Layout pattern

Koji Hayashi

Intellectual 955 points

Part Number: TUSB211-Q1

Hi All,

A layout example of DP and DM is described in DataSheet.

Please teach me the layout of the following widths.

①
A:0.185mm
B:0.215mm
C:0.185mm

②
A:0.150mm
B:0.150mm
C:0.150mm

Best Regards
Koji Hayashi

over 6 years ago

0 Cevin over 6 years ago

TI__Intellectual 1165 points

Hi,

please find the exact dimensions of the pads at the end of the datasheet or in the package outline document for RWB package. Please note that the D1P should be connected with D2P and D1M with D2M., which can be done by routing the traces straight through as shown in the layout example

For the widths of DP and DM in respect to your drawing this should be:

A 0.2mm

B 0.2mm

C 0.2mm

Best regards

Cevin

0 Koji Hayashi over 6 years ago in reply to Cevin

Intellectual 955 points

Hi Cevin,

The customer's wiring rule of the board is ① or ②．

If I change only the wiring under TUSB211-Q1 to 2 mm 2 mm 2 mm, is there any influence on the operation?

Best Regards

Koji Hayashi

0 Cevin over 6 years ago in reply to Koji Hayashi

TI__Intellectual 1165 points

Hi,

the change in width can cause impedance mismatches. Please ensure 90 Ohm differential impedance routing throughout the board. Please find some guidelines for High-Speed Interface layout under following link:

http://www.ti.com/lit/an/spraar7f/spraar7f.pdf

Best regards

Cevin

0 Koji Hayashi over 6 years ago in reply to Cevin

Intellectual 955 points

Hi Cevin-san

Thank you for your quick response.
I was understood.

Best Regards
Koji Hayashi

0 Koji Hayashi over 6 years ago in reply to Cevin

Intellectual 955 points

Hi Cevin-san

A confirmation request came from my customer regarding the wiring pattern.

Is it possible to check?

If possible, we will send you materials, so please tell me your e-mail address.

Best Regards
Koji Hayashi

0 Undrea Fields over 6 years ago in reply to Koji Hayashi

TI__Expert 7400 points

Hayashi-san,

I can help with this, you can send to ufields@ti.com.

Regards,

Undrea

0 Undrea Fields over 6 years ago in reply to Undrea Fields

TI__Expert 7400 points

Hayashi-san,

The customer's layout diagram with 150um/150um is acceptable. The discontinuities are minimal and should not affect the High-Speed signaling.

Regards,

Undrea

0 Koji Hayashi over 6 years ago in reply to Undrea Fields

Intellectual 955 points

Hi Undrea-san

Thank you for support.

I would like to confirm,upper figure is no good, lower fiture is good.

Is it correct ?

Best Regards
Koji Hayashi

0 Undrea Fields over 6 years ago in reply to Koji Hayashi

TI__Expert 7400 points

Correct. I wouldn't say the upper figure is no good, the lower figure would yield slightly better results. I wouldn't expect the upper figure to cause any significantly noticeable signal integrity issues at 480MB/s.

Regards,

Undrea

0 Koji Hayashi over 6 years ago in reply to Undrea Fields

Intellectual 955 points

Undrea-san

Thank you for response.

I was understood.

Best Regards
Koji Hayashi

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TUSB211-Q1: Layout pattern