E4257ALPT Semtech, E4257ALPT Datasheet - Page 24
E4257ALPT
Manufacturer Part Number
E4257ALPT
Description
Manufacturer
Semtech
Datasheet
1.E4257ALPT.pdf
(39 pages)
Specifications of E4257ALPT
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
E4237, E4257 Package Information (continued)
NOTES:
1)
2)
3)
4)
5)
6)
7)
8)
TEST AND MEASUREMENT PRODUCTS
2005 Semtech Corp. / Rev. 5, 11/30/05
8
Dimensioning and tolerancing conform to
ASME Y14.5M-1994.
All dimensions are in millimeters. Angles are in degrees.
N is the total number of terminals.
The terminal #1 identifier and terminal numbering
convention shall conform to JESD 95-1 SPP-012. Details
of terminal #1 identifier are optional, but must be located
within the zone indicated. The terminal #1 identifier may
be either a mold or marked feature.
Dimension b applies to metallized terminal and is
measured between 0.25mm and 0.30mm from terminal
tip. Dimension L1 is the terminal pull back from package
E up to 0.1mm is acceptable. L1 is optional.
ND and NE refer to the number of terminals on each
D and E side respectively.
Depopulation is possible in a symmetrical fashion.
Bilateral coplanarity zone applies to exposed heat slug
(if any) as well as the terminals.
//
0.08 C
ccc C
NOTE
IS OPTIONAL
5
A
L1
5
A1
TERMINAL/SIDE
SIDE VIEW
Detail B
e
(DATUM A OR B)
e/2
TERMINAL TIP
5
24
A3
SEATING
PLANE
C
R
a
b
c
N
D
N
A
A
E
D
N
E4237/E4257/E4287
e
A
b
E
e
k
x
a a
b b
c c
L
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2
D
1
3
E
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7
8
7
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9 .
5 .
9 .
5 .
2 .
3 .
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O
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2 .
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0
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9
7
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7
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0
0
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6
1
1
0
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O
9 .
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2 .
0 .
6 .
0 .
6 .
4 .
1 .
1 .
1 .
–
–
4
6
6
B
D
M
R
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2
5
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5
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5
0
5
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S
www.semtech.com
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8 .
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8 .
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