• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 20 subscribers
  • Views 62 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN74VMEH22501A: What would be the impact of leaving the B port signals floating?

Stephen Mann
Prodigy 30 points
Part Number: SN74VMEH22501A

Tool/software:

Hi, 

We are re-using an existing design that what using these Transceivers for VME bus. The re-use design is not actually using the buffers, but they are to remain in circuit and powered. 

In the existing design, the B ports would have been terminated by standard VME 5V 330R pull up 470R pull down. (~2.94V for undriven.), HOWEVER, In the new design the preference is to leave then unconnected.

On the Data Sheet, the recommended Operating conditions only states that: "All unused control inputs of the device must be held at VCC or GND to ensure proper device operation."

Are we safe to assume that we can leave the B ports 'floating'?

Thanks in advance

Steve