SN74AVC4T774: SN74AVC4T774 application problems

zhao zhaoyong

Part Number: SN74AVC4T774
Other Parts Discussed in Thread: SN74AXC4T774

Hello:

Please help to confirm whether the terminals of VCCA and VCCB are completely isolated from IO and whether the control of OE terminal can be isolated.

Best Regards

Leon

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over 7 years ago

0 Clemens Ladisch over 7 years ago

Guru 327310 points

If at least one power supply (VCCA or VCCB) is at ground, then all I/Os have high impedance.

The OE pin is a CMOS input, so it always has high impedance.

(Is that what you mean with "completely isolated"?)

0 Dylan Hubbard over 7 years ago in reply to Clemens Ladisch

TI__Mastermind 48355 points

Hi Zhao,

Was Clemens able to answer your question? I'm also not quite sure what you are meaning by completely isolated. Also, I would recommend using the SN74AXC4T774 which is a better pin to pin alternative that is new.

Logic

Logic forum

SN74AVC4T774: SN74AVC4T774 application problems