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how long can TCA9617A support when using as buffer

Other Parts Discussed in Thread: TCA9617A, P82B715

Hi,

Our cusotme uses TCA9617A as I2C buffer and the PCB trace would be longer than 50 inch from the buffer to downstreem device.

Does TCA9617A support this kind long trace when it works at high speed mode? Can you give some comments?

 

Thanks.

Oliver Ou

  • Hello,

    This question cannot easily be answered with the measurement given.

    The device is rated to support the full capacitance 400 pF at 400 kHz. Your layout will play a significant portion of what your average pF/inch of trace comes out to.

    We do offer other devices such as the P82B715, which support 3000 pF for longer distance communication.