SN74LVC4245A: About Pin Configuration and Functions

user6345333

Part Number: SN74LVC4245A
Other Parts Discussed in Thread: SN74LVC245A

Tool/software:

To the person in charge

About Pin Configuration and Functions(page3) of Data-sheeet (SCAS375J – MARCH 1994 – REVISED DECEMBER 2022)

As for pin 23, it is marked as NC, VCCB.
Is there any particular reason for this?
In the table at the bottom of the page, pin 23 is marked as VCCB,
so I think it should be recognized as VCCB,
but if there are any points to note, please teach me.

Best regards

Shingu

2 months ago

0 Clemens Ladisch 2 months ago

Guru 287690 points

The pinout is designed to be backwards compatible with plain, 20-pin transceivers like the SN74LVC245A (if both supplies are the same). Pin 23 would be pin 20, the only VCC pin.

I do not know if pin 23 is NC or not. But you should connect both pins 23 and 24 to VCCB on your board.

0 Joshua Salinas 2 months ago

TI__Genius 11800 points

Hello,

I agree with Clemens, I'm not entirely why pin 23 is labeled NC and VCCB (might be a typo) but please connect pin 23 to VCCB. Thanks!

Regards,

Josh

0 user6345333 2 months ago in reply to Joshua Salinas

Prodigy 190 points

Hello Clemens-san, Josh-san

Thank you for prompt reply .

Regards,

Shingu

Logic

Logic forum

SN74LVC4245A: About Pin Configuration and Functions