Answers Database
XPLA1: Recommended decoupling.
Record #7621
Product Family: Hardware
Product Line: R3000
Product Part: R3032
Problem Title:
XPLA1: Recommended decoupling.
Problem Description:
Urgency: Hot
General Description: For the XPLA1 devices, what is recommended
for decoupling?
Solution 1:
The edge rates of the XPLA1 parts can be sub 2 ns speeds.
Decoupling is a priority, as is the application of good design technique
such as the use of ground and power planes, limited trace length, and
signal termination.
Always decouple every VDD pin. The VDD structure of the XCR devices
is such that VDD pins power different portions of the device; decoupling
only some of the pins carries the risk of not decoupling an integral part
of the device.
For a 'rule of thumb minimum', place a .01 uF capacitor on each VDD
pin. This capacitor should be a surface mount ceramic chip type
capacitor placed as physically close to the VDD pin as possible.
End of Record #7621 - Last Modified: 10/11/99 16:16 |
