UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 1575

XC4000XL: 1996 DATA BOOK: Page 4-24 table 10.Supported Source for XC4000-Series Device Inputs is incorrect

Description

Keywords: 3.3V, 4000XL, DATA BOOK, VTT, 5V

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.

解决方案

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.
AR# 1575
创建日期 12/06/1996
Last Updated 01/12/2003
状态 Archive
Type 综合文章