[FAQ] CDCE6214: Schematic Review - Clock generation for AM644x

Kavin Ravi

Part Number: CDCE6214
Other Parts Discussed in Thread: TPS22965,

Hi,

We use clock generator, CDCE6214RGET along with TI's CPU in one of our products. Could you please review our schematics?

Thank you.

Regards,

Kavin

10 months ago

0 Cris Kobierowski 10 months ago

TI__Expert 3435 points

Hello,

The clock gen team has been out of office. Please expect a delay in response and thank you for your patience.

+1 Cris Kobierowski 10 months ago

TI__Expert 3435 points

Kavin,

The VDD_VCO supply should be further isolated using ferrite beads [see image from datasheet]

Best,

Cris

+1 Cris Kobierowski 10 months ago in reply to Cris Kobierowski

TI__Expert 3435 points

Kavin,

Additionally, your SDA and SCL pins should be pulled to VCC, not left floating.

Best,

Cris

0 Kavin Ravi 9 months ago in reply to Cris Kobierowski

Prodigy 90 points

Hi Cris,

Thank you for reviewing our design.

We will update the schematics.

Regards,

Kavin

0 Kallikuppa Sreenivasa 9 months ago in reply to Cris Kobierowski

TI__Guru**** 154149 points

Hi All,

Updated schematics is shown below.

Regards,

Sreenivasa

0 Cris Kobierowski 9 months ago in reply to Kallikuppa Sreenivasa

TI__Expert 3435 points

Sreenivasa,

Be sure to include a 1uF capacitor on the other side of the ferrite beads as well, if the supply does not already have it. Once that is done, your schematic looks good.

Best,

Cris

0 Kallikuppa Sreenivasa 9 months ago in reply to Cris Kobierowski

TI__Guru**** 154149 points

Hello Cris,

Great and thank you for the suggestions.

The Supply is switch by a load switch and has 1 10 uF + 1 uF at the input.

Regards,

Sreenivasa

0 Cris Kobierowski 9 months ago in reply to Kallikuppa Sreenivasa

TI__Expert 3435 points

Hello,

According to the datasheet of the TPS22965, the capacitor at Vout should be 22uF.

Best,

Cris

0 Kallikuppa Sreenivasa 9 months ago in reply to Cris Kobierowski

TI__Guru**** 154149 points

Hello Chris,

Thank you. Please refer below. Let me check with the eFuse team.

Regards,

Sreenivasa

0 Cris Kobierowski 9 months ago in reply to Kallikuppa Sreenivasa

TI__Expert 3435 points

Hello,

Apologies, I did not see that section. As far as the CDCE6214 is concerned, your 100nF capacitor on Vout should be fine.

Best,

Cris

0 Kallikuppa Sreenivasa 9 months ago in reply to Cris Kobierowski

TI__Guru**** 154149 points

Hello Chris,

Thank you for the support.

Regards,

Sreenivasa

Processors

Processors forum

[FAQ] CDCE6214: Schematic Review - Clock generation for AM644x