W24257A Winbond, W24257A Datasheet - Page 9

• Manufacturer Part Number: W24257A
• Description: 32K X 8 High Speed CMOS Static RAM
• Manufacturer: Winbond

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