TI chip strange labeling

bigbat

TI chip strange labeling [Copy link]

Today I saw a chip CD4504, which is a TTL to COMS level chip. TI's chip is marked as CM504B, and the chip CD4051B I bought is marked as CM051B. It seems that CD4 has been replaced by CM. Haha, I almost got confused.

qwqwqw2088

Someone asked the same question on the e2e forum on TI's official website.

Or a discontinued chip.

It is best not to use it in large quantities, as mass production will cause problems.

bigbat

qwqwqw2088 posted on 2020-8-5 15:24 Someone asked the same question on TI's official website e2e forum. Or it is best not to use a large number of discontinued chips, as mass production will cause problems

Thanks for the reminder! However, CD4051 is manufactured by several companies, but CD4504B is not manufactured by other companies in the market.

I use CD4504B because I want to use CD4051 to switch 10V voltage. My control is 5V, but CD4051 needs 7V for high level when VDD=10V, so I use CD4504B to convert the level. I don't know if there is a better chip than CD4051. The control is TTL and the analog switch is 10V. I found that there are very few CD chips with this design.

alan000345

So interesting.

okhxyyo

Someone asked the same question on the e2e forum of TI official website. Or it is best not to use a large number of discontinued chips, as mass production will cause problems

Thanks for the explanation.