w27e257p-15 Winbond Electronics Corp America, w27e257p-15 Datasheet - Page 13

• Manufacturer Part Number: w27e257p-15
• Description: 32k X 8 Electrically Erasable Eprom
• Manufacturer: Winbond Electronics Corp America

PACKAGE DIMENSIONS
28-pin P-DIP
32-pin PLCC
L
13
E
Seating Plane
5
1
A
L
A
2
28
1
14
S
4
e
G
1
H
E
E
E
B
B
b
b
32
1
1
D
20
30
e
1
21
29
A
A
2
1
D H
14
15
y
D
A
A
1
Base Plane
Seating Plane
a
c
- 13 -
G
D
E
e
A
c
Notes:
Symbol
4. General appearance spec. should be based on final
Publication Release Date: January 1997
1. Dimension D & E do not include interlead flash.
2. Dimension b does not include dambar protrusion/intrusion.
3. Controlling dimension: Inches.
A
A
A
b
b
c
D
H
H
L
E
e
G
G
y
visual inspection sepc.
1
2
1
D
E
D
E
Notes:
Symbol
1. Dimension D Max. & S include mold flash or
2. Dimension E1 does not include interlead flash.
3. Dimension 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
Dimension in Inches
0.020
0.105
0.026
0.016
0.008
0.547
0.447
0.044
0.490
0.390
0.585
0.485
0.075
Min. Nom. Max.
A
A
A
B
B
c
D
L
e
S
E
E
e
a
tie bar burrs.
are determined at the mold parting line.
protrusion/intrusion.
final visual inspection spec.
0 °
1
A
1
2
1
1
0.090
0.110
0.028
0.018
0.010
0.550
0.450
0.050
0.51
0
0.410
0.590
0.49
0
Dimension in Inches
0.010
0.150
0.016
0.058
0.008
0.590
0.090
0.120
0.540
0.630
Min. Nom. Max.
0
0.553
0.453
0.056
0.530
0.430
0.595
0.495
0.095
0.004
0.140
0.115
0.032
0.022
0.014
0.060
0.010
1.460
0.600
0.155
0.018
0.545
0.100
0.130
0.650
10 °
13.89
11.35
12.45
14.86
12.32
Min.
0.50
2.67
0.66
0.41
0.20
1.12
1.91
9.91
0.160
0.022
0.064
0.014
1.470
0.610
0.550
0.110
0.140
0.670
0.210
0.090
15
0 °
Dimension in mm
Nom.
13.97
11.43
12.9
5
10.41
14.99
12.45
14.99
13.72
16.00
2.80
0.71
0.46
0.25
1.27
Min.
2.29
0.25
3.81
0.41
1.47
0.20
2.29
3.05
Dimension in mm
W27E257
0
Max.
14.05
11.51
Nom.
37.08
15.24
13.84
13.46
10.92
15.11
12.57
16.51
3.94
0.46
1.52
0.25
3.56
2.93
0.81
0.56
0.35
1.42
2.54
3.30
2.41
0.10
10 °
37.34
15.49
Revision A3
5.33
13.97
17.02
Max.
4.06
0.56
1.63
0.36
2.79
3.56
2.29
15