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Single buffer line from 74ABT244 to 16 inputs for 74AHC245?

Electrical Engineering Asked by Sap on December 31, 2020

I am designing a circuit which will buffer 3.3V input from Raspberry pi using 74ABT244D,623 and there will be 4 output chains on the PCB. Each chain will be connected through FRC to a second PCB with an immediate buffer of 74AHC245. But one data line will be shorted into 4 to get 4 outputs.

So from 1 single output of 74ABT244D,623, can it drive 4 inputs to 4 74AHC245 each (16 total) ?

Reference image :-
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One Answer

What does your datasheet say?

-32mA (hi) 64 mA (Lo) drive

+/-1 uA load + 10pf (Ic=C dV/dt) per transition

What is load capacitance? And frequency? To determine Zc

So far so good, what f ? low? No problem

  • make sure to use decoupling cap on IC’s. ~0.01 uF typ.

Answered by Tony Stewart Sunnyskyguy EE75 on December 31, 2020

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