NE555: NE555DR CODE

chang Sharon

Part Number: NE555

Dear Sir,

Could you please indicate the meaning of the letters (D49VQ4) in the red frame of the picture?
In addition, is there any specificity or cording principle could be consulted?

over 4 years ago

0 Ron Michallick over 4 years ago

TI__Guru*** 140106 points

Hello Chang,

Welcome to the e2e forums. I hope you find the forum useful. Your picture did not attach correctly. I assume you are referring to the bottom line of text. 'D49V' is part of the lot code used for TI internal purposes. 'Q4' is actually 'G4' and refers to the 'green' materials in the device.

Are you happy with the performance of the NE555 device or do you need some assistance?

0 chang Sharon over 4 years ago in reply to Ron Michallick

Prodigy 30 points

Hello Ron

did you have any data or paper can explanation Definition of this line of text??(Third line of text on IC)

thanks

0 Ron Michallick over 4 years ago in reply to chang Sharon

TI__Guru*** 140106 points

Chang,

My original description is all I have. For almost every purpose the first 4 characters are meaningless. The G4 does have meaning. See this document

0 chang Sharon over 4 years ago in reply to Ron Michallick

Prodigy 30 points

Hi Ronald

How can read the date code ?

Chip marking line2 "8AK"

Did you have any data or paper can explanation Definition of this line of text?

0 Ron Michallick over 4 years ago in reply to chang Sharon

TI__Guru*** 140106 points

Chang,

Row 2 is more meaningful. That is year (2018), month (A=October), (K) is where the device was assembled.

Month is 1 through B. There is no list of assembly countries, but look at the original label for that.

Clock & timing

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NE555: NE555DR CODE