Preliminary W24256
PACKAGE DIMENSIONS
28-pin P-DIP
Dimension in Inches
Dimension in mm
Symbol
Min. Nom. Max. Min. Nom. Max.
0.210
5.33
A
0.010
0.150 0.155 0.160
0.25
3.81
0.41
1.47
0.20
A1
3.94
0.46
1.52
0.25
4.06
0.56
1.63
0.36
A
B
2
0.016 0.018
0.060
0.022
0.064
0.058
B
c
1
0.008 0.010 0.014
1.460 1.470
37.08 37.34
15.49
15.24
D
E
E1
D
0.610
0.590 0.600
14.99
28
15
13.72 13.84 13.97
0.540
0.090
0.545 0.550
0.110
0.140
15
2.29
3.05
0
0.100
0.130
2.54
3.30
2.79
e
1
0.120
0
3.56
15
L
a
E 1
0.630
17.02
2.29
0.650 0.670 16.00 16.51
0.090
A
e
S
Notes:
1
14
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.
E
S
c
A
L
A
2
A1
Base Plane
4. Dimension B1 does not include dambar
Seating Plane
protrusion/intrusion.
.
5. Controlling dimension: Inches.
6. General appearance spec. should be based on
final visual inspection spec.
B
e1
eA
a
B 1
28-pin SOP Wide Body
Dimension in mm
Dimension in Inches
Symbol
A
Nom.
Nom.
Min.
Max. Min.
0.112
Max.
2.85
0.004
0.093
0.10
1
A
28
15
0.098 0.103
2.36
0.36
0.20
2.49
0.41
2.62
0.51
0.36
18.62
8.53
1.42
A
2
e
1
0.014 0.016
0.008 0.010
0.020
0.014
b
c
D
E
e
0.25
0.713 0.733
18.11
E
H
E
8.28
0.326 0.331 0.336
8.41
1.27
0.044 0.050 0.056 1.12
q
0.453 0.465 0.477 11.51 11.81 12.12
H
L
E
0.028
0.044
0.036
0.91
1.70
1.12
0.71
1.50
L
Detail F
0.075
0.047
0.059 0.067
1.91
1.19
L
S
y
E
14
1
b
0.10
10
0.004
10
0
0
q
Notes:
1. Dimensions D Max. & S include mold flash
or tie bar burrs.
2. Dimension b does not include dambar
protrusion/intrusion.
1
e
D
c
3. Dimensions D & E include mold mismatch
.
A
A2
and determined at the mold parting line.
4. Controlling dimension: Inches.
S
E
e
L
1
A
y
5. General appearance spec should be based
on final visual inspection spec.
See Detail F
Seating Plane
- 8 -
WINBOND [ WINBOND ]
