SN54SLC8T245-SEP: 12.5 MHz SPI with SN54SLC8T245-SEP

Moral Assraf

Tool/software:

Hi Team,

Does SN54SLC8T245-SEP suitable for SPI with 12.5MHz clock?

Is there application note related to this application? Pull up/down resistors needed?

Thanks.
Moral.

4 months ago

0 Michael Ikwuyum 4 months ago

TI__Mastermind 32125 points

Hi Moral,

Yes, device is suitable as it supports higher data rates.

Unfortunately, no application note specific to SPI / device. However, see https://www.ti.com/lit/an/scea065b/scea065b.pdf?ts=1718722747574&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FSN74AXC8T245 for generic SPI app note. Also, no pull-ups / pull-downs needed. If used, < 30 K ohms works great, thanks.

Best Regards,

Michael.

0 Joshua Salinas 4 months ago

TI__Expert 8760 points

Hello Moral,

Adding to what Michael said, if VCCA/VCCB supplies are around 1.8V to 3.3V, this should be fine. Prop delay increases at lower voltages. The device is rated up to 380Mbps so 12.5MHz should be fine.

For a SPI configuration, you need to pull DIR1 high and DIR2 low. Let us know if there are any questions.

Regards,

Josh

0 Moral Assraf 4 months ago in reply to Joshua Salinas

Prodigy 155 points

Hey Guys,
Thanks for the quick respond the Voltages are 1.8V VCCA and 1.2V VCCB SPI can work with 6.25 MHz up to 12.5 MHz so I can configure it as 6.25MHz if it will make a difference.

Let me know what you think.

Thanks,
Moral.

+1 Michael Ikwuyum 4 months ago in reply to Moral Assraf

TI__Mastermind 32125 points

Hi Moral,

Both data rates works fine for the device, thanks.

Best Regards,

Michael.

0 Moral Assraf 4 months ago in reply to Michael Ikwuyum

Prodigy 155 points

Thank you guys!

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SN54SLC8T245-SEP: 12.5 MHz SPI with SN54SLC8T245-SEP