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SN74ACT04: How to increase out drive current.

Part Number: SN74ACT04
Other Parts Discussed in Thread: UCC27516, UCC27523

Hello guys,

I have 2 questions. Could you please give me your reply?

One of my customer uses SN74ACT04PWR for their current products.
For their new products, they need to increase the device output drive current to +/-72mA.
So they are going to tie 3ch output of same chip together to increase output current. Also they tie 3ch input of same inverter together.

My questions are below.

Q1. I think this way for output drive current increasing is no problem because this device CMOS process. Is my understanding correct?
Q2. Do you have any document which describes how to increase output drive current like the above? 

Your reply would be much appreciated.

Best regards,
Kazuya.