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參數(shù)資料
| 型號： | W27C257P-12 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | PROM |
| 英文描述： | 32K X 8 EEPROM 12V, 120 ns, PQCC32 |
| 封裝： | PLASTIC, LCC-32 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 153K |
| 代理商： | W27C257P-12 |
W27C257
Publication Release Date: September 1998
- 13 -
Revision A2
PACKAGE DIMENSIONS
28-pin P-DIP
Seating Plane
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.
6. General appearance spec. should be based on
final visual inspection spec.
1.63
1.47
0.064
0.058
Notes:
Symbol
Min. Nom. Max.
Max.
Nom.
Min.
Dimension in Inches
Dimension in mm
A
B
c
D
e
A
L
S
A
1
2
E
0.060
1.52
0.210
5.33
0.010
0.150
0.016
0.155
0.018
0.160
0.022
3.81
0.41
0.25
3.94
0.46
4.06
0.56
0.008
0.120
0.670
0.010
0.130
0.014
0.140
0.20
3.05
0.25
3.30
0.36
3.56
0.540
0.550
0.545
13.72
13.97
13.84
17.02
15.24
14.99
15.49
0.600
0.590
0.610
2.29
2.54
2.79
0.090
0.100
0.110
B 1
1
e
E 1
a
1.460
1.470
37.08
37.34
0
15
0.090
2.29
0.650
0.630
16.00
16.51
4. Dimension B1 does not include dambar
protrusion/intrusion.
5. Controlling dimension: Inches.
15
0
eA
2
A
a
c
E
Base Plane
1
A
1
e
L
A
S
1
E
D
1
B
28
1
15
14
32-pin PLCC
L
c
1
b
2
A
H
E
e
b
D HD
y
A
A1
Seating Plane
E
G
GD
1
13
14
20
29
32
4
5
21
30
Notes:
Symbol
Min.
Nom.
Max.
Nom.
Min.
Dimension in Inches
Dimension in mm
A
b
c
D
e
H E
L
y
A
1
2
E
b 1
G D
3.56
0.50
2.80
2.67
2.93
0.71
0.66
0.81
0.41
0.46
0.56
0.20
0.25
0.35
13.89
13.97
14.05
11.35
11.43
11.51
1.27
H D
G E
12.45
12.95
13.46
9.91
10.41
10.92
14.86
14.99
15.11
12.32
12.45
12.57
1.91
2.29
0.004
0.095
0.090
0.075
0.495
0.490
0.485
0.595
0.590
0.585
0.430
0.410
0.390
0.530
0.510
0.490
0.050
0.453
0.450
0.447
0.553
0.550
0.547
0.014
0.010
0.008
0.022
0.018
0.016
0.032
0.026
0.028
0.115
0.105
0.110
0.020
0.140
1. Dimension D & E do not include interlead flash.
2. Dimension b does not include dambar protrusion/intrusion.
3. Controlling dimension: Inches.
4. General appearance spec. should be based on final visual
inspection spec.
1.12
1.42
0.044
0.056
0°
10°
0°
0.10
2.41
θ
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