參數(shù)資料
型號(hào): 82803AAMRH-R
英文描述: Controller Miscellaneous - Datasheet Reference
中文描述: 控制器雜項(xiàng)-數(shù)據(jù)表參考
文件頁(yè)數(shù): 48/52頁(yè)
文件大?。?/td> 322K
代理商: 82803AAMRH-R
82803AA MRH-R
R
48
Datasheet
5.3.
MRH-R RSL Normalized Trace Length Data
These lengths must be considered when matching trace lengths as described in the design guide. Note
that these lengths in Table 6 are normalized to 0 with the longest trace on the package. They do not
represent the actual lengths from pad to ball.
The following formula is used to determine
L
PCB
L
PCB
= (
L
pkg
*V
pkg
) / V
PCB
L
PCB
is the nominal
PCB trace length to be added on the PCB
L
Pkg
is the nominal
package trace length
V
pkg
is the package trace velocity, and the nominal value is 180 ps/in
V
PCB
is the PCB trace velocity
The data given can be renormalized to start routing from a different ball. If a different RSL signal (other
than longest trace) is used for nominalization, simply use the following equation:
New
L
pkg
' =
L
pkg
-
L
RSL
For example: For the MCH, if MCH CHA_CFM trace length is used for nominalization, then:
Signal
L
PKG
(mils)
New
L
PKG
(mils)
CHA_CFM
CHA_CFM#
CHA_CTM
102.756
118.897
130.315
0.000
16.142
27.559
:
:
:
:
:
:
CHA_RQ6
CHA_RQ7
124.409
175.984
21.653
73.228
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