W27C512
PACKAGE DIMENSIONS
28-pin P-DIP
Dimension in Inches
Dimension in mm
Symbol
A
Nom.
Nom.
Min.
Max. Min.
0.210
Max.
5.33
0.010
0.150
0.016
0.058
0.25
A
A
B
B
c
1
0.155 0.160
0.018 0.022
3.81
0.41
1.47
0.20
3.94
0.46
1.52
0.25
37.08
4.06
0.56
1.63
0.36
37.34
2
0.060
0.064
1
0.008 0.010 0.014
1.460 1.470
D
E
E 1
D
0.610
0.540 0.545 0.550
15.24 15.49
0.590 0.600
14.99
28
15
13.72 13.84 13.97
0.110
0.140
15
0.090 0.100
2.29
3.05
0
2.54
3.30
2.79
e
L
a
1
0.120
0
0.130
3.56
15
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
2
A
1
A
Base Plane
4. Dimension B1 does not include dambar
protrusion/intrusion.
Seating Plane
5. Controlling dimension: Inches.
6. General appearance spec. should be based on
final visual inspection spec.
B
e1
eA
a
B 1
32-pin PLCC
H E
E
4
1
32
30
Dimension in mm
Min. Nom. Max. Min. Nom. Max.
Dimension in Inches
Symbol
0.140
3.56
5
A
29
0.020
0.105
0.026
0.016
0.008
0.50
2.67
0.66
0.41
0.20
A 1
A 2
0.110
0.028
0.018
0.010
0.115
0.032
0.022
0.014
2.80
0.71
0.46
0.25
2.93
0.81
0.56
0.35
b
1
b
c
D
E
e
GD
D
H
D
0.547
0.447
0.044
0.553
0.453
0.056
13.89
11.35
1.12
14.05
11.51
1.42
0.550
0.450
0.050
13.97
11.43
1.27
12.95
0.490
0.390
0.585
0.485
0.075
0.530
0.430
0.595
0.495
0.095
0.004
12.45
9.91
13.46
10.92
15.11
12.57
2.41
0.510
0.410
0.590
0.490
G D
G E
HD
H E
L
10.41
14.99
12.45
2.29
21
13
14.86
12.32
1.91
0.090
14
c
20
0.10
y
°
°
°
°
0
0
10
10
q
Notes:
L
1. Dimension D & E do not include interlead flash.
2. Dimension b does not include dambar protrusion/intrusion.
3. Controlling dimension: Inches.
A2
A
q
4. General appearance spec. should be based on final visual
inspection spec.
e
b
1
A
b
1
Seating Plane
y
G E
- 14 -
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