TLC6C5748-Q1: the number that can be daisy-chained

Takao Yamamoto5

Part Number: TLC6C5748-Q1

Hi team,

Could you teach how many this device can be daisy-chained?

I think there are limitation of this number because people can see LEDs control with the more daisy-chained devices, the slower serial data speed.

If you have some data of many daisy-chained devices, please share me?

Best regards,

over 4 years ago

0 Frank Qiu over 4 years ago

TI__Genius 15776 points

How many device you want to use in your system, there will be infinite in principle.

0 Takao Yamamoto5 over 4 years ago in reply to Frank Qiu

Expert 1690 points

10 or 11 devices.

In this case, you do not have any concern?

Best regards,

Yamamoto

0 Frank Qiu over 4 years ago in reply to Takao Yamamoto5

TI__Genius 15776 points

If all device is in one board, i think it's ok .

0 Andy Snawerdt over 4 years ago in reply to Frank Qiu

TI__Intellectual 2300 points

Hello Frank,

I have the same question here, except for in my case we will have 28 devices daisy-chained together. Your above answer seems to indicate that as long as the parasitic capacitance is low enough (e.g. all devices are on the same board not going through a long connector), then this isn't a concern.

Do we happen to have a specific limitation with regards to the amount of parasitic capacitance that can be handled? Moreover have we analyzed just how many devices can be daisy-chained together on the same board before noticeable issues occur?

Regards,

Andy

0 Frank Qiu over 4 years ago in reply to Andy Snawerdt

TI__Genius 15776 points

Hi Andy, it's hard to generally talk about the limitation about the quantity of device in daisy-chain, whether off-board, the length of SCLK and GCLK trace and some other conditions all effect it. Our PL is preparing an Design note for it but not finish. If you have a real case, you can directly send the schematic to Charles Chen(expert for 5748), and i can tell you that we have already supported a case that used 40pcs of 5748 in one bus.

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TLC6C5748-Q1: the number that can be daisy-chained