TCAN4550-Q1: About constants around the crystal oscillator.

Kengo.Y

Part Number: TCAN4550-Q1

Hi team,

I'd like to know about the crystal oscillator.

1. How much capacity does the OSC1 and OSC2 have?
If there is capacity, how much will it vary?

2. Could you share the matching evaluation result of the crystal oscillator on the EVM?

Sincerely.
Kengo.

over 4 years ago

0 BOBBY over 4 years ago

TI__Guru 72821 points

Hi Kengo,

I've assigned our expert to address your question though I would like to confirm, is this question the same/related to this one: https://e2e.ti.com/support/interface-group/interface---internal/f/interface---internal-forum/1014911/tcan4550-crystal-oscillator

If so, can we answer that thread instead?

-Bobby

0 Kengo.Y over 4 years ago in reply to BOBBY

Guru 11245 points

Hi Bobby,

There was no link your attached.
Could you give me the correct link?

Sincerely.
Kengo.

0 BOBBY over 4 years ago in reply to Kengo.Y

TI__Guru 72821 points

: https://e2e.ti.com/support/interface-group/interface---internal/f/interface---internal-forum/1014911/tcan4550-crystal-oscillator

0 Kengo.Y over 4 years ago in reply to BOBBY

Guru 11245 points

I think it was an internal E2E site.
I can not see it yet.

BR.
Kengo.

0 BOBBY over 4 years ago in reply to Kengo.Y

TI__Guru 72821 points

Sorry Kengo,

Looks like you're right. The question you asked on this thread seems similar to the one on the internal site which was made a few hours after yours. I guess the assigned expert will have to answer both separately (I was hoping we could combine them). Sorry for confusing you here.

-Bobby

+1 Eric Schott1 over 4 years ago

TI__Guru 53555 points

Hi Kengo,

Are you perhaps in touch with an FAE handling a similar issue? I discussed this in a meeting last night, so it's funny to see both post happen so close if they aren't related.

1) We will be sharing this information publicly in an upcoming app note that will have more specific values. If would need this info now (and are not in contact with the same FAE), please email me and I can share this directly.

2) I'm in contact with the EVM designer and will have a more direct answer after the US holiday. However, my guess is that the EVM was designed using the recommendations on the crystal datasheet (8pF load caps) and following best practices for high-frequency PCB design (short traces, length matching, etc.)

Regards,
Eric Schott

0 Kengo.Y over 4 years ago in reply to Eric Schott1

Guru 11245 points

Hi Eric and Bobby,

Thank you for your comment.
I have already contacted FAE in my country.

Thank you so much for your support.

Sincerely.
Kengo.

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TCAN4550-Q1: About constants around the crystal oscillator.