SN74HC244: PCN#20250520000.0

Thomas Ganahl

Prodigy 40 points

Part Number: SN74HC244
Other Parts Discussed in Thread: SN54HC244

Tool/software:

Next PCN of Texas Instruments, which is a total mess …

PCN letter affected products page missing most of the products mentioned later in the table
The change description in the revision history is completely useless and wrong.
Recommended operating temperature for SN74HC244 is still +85°C
Low power consumption (maximum) stated in the datasheet header 80µA but the specification got changed in the electrical characteristics of SN74HC244
The "new" characteristics of the SN74HC244 are copied from the SN54HC244.

What happened here?
What is the intention of these adoptions?
If the recommended operating temperature is or gets adopted to +125°C
- What is the key difference from the SN54HC244?
- What will be the specification for the SN74HC244 at +85°C?
Have there been changes to the die, manufacturing, testing, or packaging in the last 2 years?

3 months ago

0 Albert Xu1 3 months ago

TI__Mastermind 38155 points

Hi Thomas,

1. What you are referring to I am assuming are the G4/E4 parts which are the same device.

2, 3. I agree that this was a mistake on our part. The operating temperature should be at 125C.

4. Not sure how this got changed

5. Overall, the adoption of these changes are supposed to reflect that the performance of 54/74 are the same (i.e. 85C performance is the same for both devices). EP devices get extra tests during qualification, but are derived from the same die.

I will look into making changes to this as this datasheet contains many mistakes are you mentioned.

0 Thomas Ganahl 3 months ago in reply to Albert Xu1

Prodigy 40 points

Hi Albert,

To 1.
On page 2, not every part is listed. It is written that this is a subset of recently bought parts.

I already have other PCNs where the information on page 2 is also wrong. Can you explain how the information on page 2 is generated?

Until when will the new datasheet be available?

+1 Albert Xu1 3 months ago in reply to Thomas Ganahl

TI__Mastermind 38155 points

Hi Thomas,

I am not in charge of generating the PCN, so I am not sure about this process. Do you mean that you have purchased more parts than what is mentioned on pg2? I will forward this feedback to the correct team and I can get some more insight on how this is generated.

I do not have a definitive date for a datasheet update, but a good estimate will be 2-3 weeks.

0 Thomas Ganahl 2 months ago in reply to Albert Xu1

Prodigy 40 points

Hi Albert,

Is the new datasheet already available?

Thomas

0 Albert Xu1 2 months ago in reply to Thomas Ganahl

TI__Mastermind 38155 points

Hi Thomas,

I will check the status on this and try to push it forward.

0 Thomas Ganahl 2 months ago in reply to Albert Xu1

Prodigy 40 points

Hi Albert,

Do you have an update for me?

Best regards
Thomas

0 Albert Xu1 2 months ago in reply to Thomas Ganahl

TI__Mastermind 38155 points

Hi Thomas,

I will send over a draft tomorrow. However, it has not been published yet.

0 Albert Xu1 2 months ago in reply to Albert Xu1

TI__Mastermind 38155 points

Hi Thomas,

Apologies for the long lead time on this.

Please see attached for the current draft we have. This should be the exact datasheet that we will publish to the web. (Drafts have a watermark and dates/rev history are not included yet)

SCLS130=4=TI PDF=en-us.pdf

Logic

Logic forum

SN74HC244: PCN#20250520000.0