Answers Database
XC4000XL: 1996 DATA BOOK: Page 4-24 table 10.Supported Source for XC4000-Series Device Inputs is incorrect
Record #1575
Product Family: Hardware
Product Line: 4000EX
Product Part: 4000EX
Problem Title:
XC4000XL: 1996 DATA BOOK: Page 4-24 table 10.Supported Source for XC4000-Series Device
Inputs is incorrect
Problem Description:
Urgency: Standard
Description
In the table it shows that, in order to have a 5V CMOS device sourcing a 3.3V CMOS device(specificly
4000XL), it will require Vtt pin to 5V.
Solution 1:
That is incorrect, the new design puts an internal protection circuitry that can stand 5V CMOS input
to 3.3V XL parts.
Therefore driving a 5V CMOS output into a 4000XL input (with
CMOS inputs specified) is not be a problem.
End of Record #1575 - Last Modified: 09/12/97 09:07 |
