W24257A 데이터 시트보기 (PDF) - Winbond
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W24257A Datasheet PDF : 11 Pages
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W24257A
PACKAGE DIMENSIONS
28-pin P-DIP Skinny
28
E1
1
D
15
14
S
A A2
L
B
e1
B1
E
c
Base Plane
A1
Mounting Plane
a
eA
Symbol Dimension in Inches Dimension in mm
Min. Nom. Max. Min. Nom. Max.
A
0.175
4.45
A1
0.010
0.25
A2
0.125 0.130 0.135 3.18 3.30 3.43
B
0.016 0.018 0.022 0.41 0.46 0.56
B1
0.058 0.060 0.064 1.47 1.52 1.63
c
0.008 0.010 0.014 0.20 0.25 0.36
D
1.388 1.400
35.26 35.56
E
0.300 0.310 0.320 7.62 7.87 8.13
E1
0.283 0.288 0.293 7.19 7.32 7.44
e1
0.090 0.100 0.110 2.29 2.54 2.79
L
0.120 0.130 0.140 3.05 3.30 3.56
a
0°
15°
0°
15°
eA
0.330 0.350 0.370 8.38 8.89 9.40
S
0.055
1.40
Notes:
1. Dimensions D Max. & S include mold flash or
tie bar burrs.
2. Dimension E1 does not include interlead flash.
3. Dimensions D & E1 include mold mismatch and
are determined at the mold parting line.
4. Dimension B1 does not include dambar
protrusion/intrusion.
5. Controlling dimension: Inches.
6. General appearance spec. should be based on
final visual inspection spec.
28-pin Small Outline J Band
28
15
E HE
1
14
D
s
b
b1
e
Seating Plane
c
A2 A
L
£c
A1
e1
y
Symbol
A
A1
A2
b1
b
c
D
E
e
e1
HE
L
S
y
θ
Dimension in Inches Dimension in mm
Min. Nom. Max. Min. Nom. Max.
0.140
3.56
0.027
0.69
0.095 0.100 0.105 2.41 2.54 2.67
0.026 0.028 0.032 0.66 0.71 0.81
0.016 0.018 0.022 0.41 0.46 0.56
0.008 0.010 0.014 0.20 0.25 0.36
0.710 0.730
18.03 18.54
0.295 0.300 0.305 7.49 7.62 7.75
0.044 0.050 0.056 1.12 1.27 1.42
0.245 0.265 0.285 6.22 6.73 7.24
0.327 0.337 0.347 8.31 8.56 8.81
0.077 0.087 0.097 1.96 2.21 2.46
0.045
1.14
0.004
0.10
0
10
0
10
Notes:
1. Dimensions D Max. & S include mold flash
or tie bar burrs.
2. Dimension b does not include dambar
protrusion/intrusion.
3. Dimensions D & E include mold mismatch
and are determined at the mold parting line.
4. Controlling dimension: Inches.
5. General appearance spec. should be based
on final visual inspection spec.
Publication Release Date: May 1997
-9-
Revision A14
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