參數(shù)資料
型號(hào)： R29771LMS
文件頁(yè)數(shù)： 23/29頁(yè)
文件大?。?/td> 188K
代理商： R29771LMS
R296XX/R297XX
PRODUCT SPECIFICATION
22
Mechanical Dimensions
(continued)
28 Terminal Leadless Chip Carrier
Notes:
1. The index feature for terminal 1 identification, optical orientation or
handling purposes, shall be within the shaded index areas shown on
planes 1 and 2. Plane 1, terminal 1 identification may be an extension
of the length of the metalized terminal which shall not be wider than
the B1 dimension.
2. Unless otherwise specified, a minimum clearance of .015 inch
(0.38mm) shall be maintained between all metallized features (e.g.,
lid, castellations, terminals, thermal pads, etc.).
3. Dimension “A” controls the overall package thickness. The maximum
“A” dimension is the package height before being solder dipped.
The corner shape (square, notch, radius, etc.) may vary at the
manufacturer’s option, from that shown on the drawing. The index
corner shall be clearly unique.
5. Dimension “B3” minimum and “L3” minimum and the appropriately
derived castellation length define an unobstructed three dimensional
space traversing all of the ceramic layers in which a castellation was
designed. Dimensions “B3” and “L3” maximum define the maximum
width and depth of the castellation at any point on its surface.
Measurement of these dimensions may be made prior to solder
dripping.
6. Chip carriers shall be constructed of a minimum of two ceramic
layers.
7. Symbol “N” is the maximum number of terminals. Symbol “ND” and
“NE” are the number of terminals along the sides of Length “D” and
“E” respectively.
E
E3
D
4
D3
A1
LID
A
L2
e
D2
DETAIL“A”
DETAIL“A”
D1
PLANE 1
PLANE 2
B3
B1
L3
E2
E1
L1
(h) X 45
3 PLCS
j X 45
A
A1
B1
B3
D/E
.060
.050
.022
.006
.442
.100
.088
.028
.022
.460
1.52
1.27
.56
.15
11.23
2.54
2.24
.71
.56
11.68
3, 6
3, 6
2
Symbol
Inches
Min.
Max.
Min.
Max.
Millimeters
Notes
D1/E1
D2/E2
D3/E3
e
h
j
L1
L2
L3
ND/NE
N
.050 BSC
.040 REF
.020 REF
.045
.075
.003
1.27 BSC
1.02 REF
.51 REF
1.14
1.91
.08
.300 BSC
.150 BSC
—
7.62 BSC
3.81 BSC
—
4
4
5
7
7
.055
.095
.015
1.40
2.41
.38
7
7
28
28
2, 5
.460
11.68
4
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