Selecting right digital buffer - 20us switching

[Vindhyachal.takniki]

1. I have a microcontroller programmed to switch 16 I/O pins at 20us interval to drive certain load at each pin. I have to operate at 3.3V.

2. Now I want to buffer the MCu pin from load with a buffer.'

3. I have been reading about TI's SN74ALVC16244A. It is 16 bit buffer, with 3ns Tpd.

4. What will be each pin max drive current when all pins are turning on at same time. Datsheet says +-24mA drive, is it for all pin together or individual?

5. Any other better buffer?

[tggzzz]

1. I have a microcontroller programmed to switch 16 I/O pins at 20us interval to drive certain load at each pin. I have to operate at 3.3V.

2. Now I want to buffer the MCu pin from load with a buffer.'

3. I have been reading about TI's SN74ALVC16244A. It is 16 bit buffer, with 3ns Tpd.

4. What will be each pin max drive current when all pins are turning on at same time. Datsheet says +-24mA drive, is it for all pin together or individual?

5. Any other better buffer?

24mA/pin, but that varies with supply voltage, you mustn't exceed total package power and supply current limits, and you'll have to be very careful to mitigate ground bounce.

[dgtl]

What kind of loads are you driving? Push-pull output needed? Or just separate transistors or transistor arrays?

[Vindhyachal.takniki]

I have to drive a npn transistor which is used as switch