SN74LS74A: Why was SN74ACT74PWR selected as alternate device for SN74LS74ADBR?

Kazuya Nakai59

Guru 20780 points

Part Number: SN74LS74A
Other Parts Discussed in Thread: SN74ACT74

Hello guys,

One of my customers uses SN74LS74ADBR for their current products.

Recently, they received PCN of SN74LS74ADBR EOL. The PCN recommends to used SN74ACT74PWR as alternate device for SN74LS74ADBR.
But these 2 devices package type are different. Also SN74ACT74 has DB package as a line up..

At this moment, the customer has the following questions. Could you give me your reply?

Q1.
Why was SN74ACT74PWR selected as alternate device for SN74LS74ADBR in spite SN74ACT74 has DB package?

Q2.
Is the reason of SN74ACT74PWR recommendation that SN74ACT74DBR will be EOLed soon?
In other words, should they avoid SN74ACT74DBR using because the device will be EOLed soon?

Q3.
They don't want to change their current PCB layout.
So could you tell me any other alternative device for SN74LS74ADBR?
Can SN74HCT74DBR be used as a alternate device for SN74LS74ADBR?

Your reply would be appreciated.

Best regards,
Kazuya.

11 months ago

0 Malcolm Lyn 11 months ago

TI__Mastermind 19450 points

Hi Kazuya-san,

I don't know. I'm not familiar with who sends out the changes.
No. All parts are active.
Yes, you can use the HCT74DBR. But the ACT74DBR will also work just fine.

Best,

Malcolm

0 Kazuya Nakai59 11 months ago in reply to Malcolm Lyn

Guru 20780 points

Hi Malcolm,

Thank you very much for your reply.
The reply is very helpful for the customer and me.

Thank you again and best regards,
Kazuya.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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SN74LS74A: Why was SN74ACT74PWR selected as alternate device for SN74LS74ADBR?