參數(shù)資料
型號(hào): 21555-AA
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): 30/30頁(yè)
文件大小: 485K
代理商: 21555-AA
Non-Transparent PPB
30
Datasheet
Table 16
lists the package dimensions in millimeters.
Table 16. 304-Point 4-Layer PBGA Package Dimensions
Symbol
Dimension
Minimum
Value
Nominal Value
Maximum
Value
e
Ball pitch
1.27 BSC
a
a. ANSI Y14.5M-1982 American National Standard Dimensioning and Tolerancing, Section 1.3.2, defines Basic Dimension
(BSC) as: A numerical value used to describe the theoretically exact size, profile, orientation, or location of a feature or datum
target. It is the basis from which permissible variations are established by tolerances on other dimensions, in notes, or in fea-
ture control frames.
b. The value for this measurement is for reference only.
A
Overall package height
2.12
2.33
2.54
A
1
Package standoff height
0.50
0.60
0.70
A
2
Encapsulation thickness
1.12
1.17
1.22
b
Ball diameter
0.60
0.76
0.90
C
Substrate thickness
0.56 reference
b
aaa
Coplanarity
0.2
bbb
Overall package planarity
0.15
D
Overall package width
30.80
31.00
31.20
D
1
Overall encapsulation width
26.00
26.70
E
Overall package width
30.80
31.00
31.20
E
1
Overall encapsulation width
26.00
26.70
I
Location of first row (
x
-direction)
1.53 reference
b
1.53 reference
b
J
Location of first row (
y
-direction)
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