Datasheet > W24257A-20

W24257A-20

更新时间： 2022-11-26 01:22:32

品牌	Logo	应用领域
华邦 - WINBOND		/
页数	文件大小	规格书
11页	227K
描述
32K X 8 High Speed CMOS Static RAM

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W24257A-20 数据手册

W24257A

PACKAGE DIMENSIONS

28-pin P-DIP Skinny

Dimension in Inches

Dimension in mm

Symbol

Min. Nom. Max. Min. Nom. Max.

4.45

0.175

0.010

0.125

0.25

3.18

0.41

1.47

0.20

0.130

0.135

0.022

0.064

0.014

1.400

3.30

0.46

1.52

0.25

35.26

7.87

3.43

0.56

1.63

0.36

0.016 0.018

0.060

0.010

1.388

0.058

0.008

35.56

8.13

0.300

0.310 0.320

7.62

7.19

2.29

3.05

0.293

0.110

7.32

2.54

3.30

7.44

2.79

3.56

0.283 0.288

0.090 0.100

e ₁

0.140

0.120 0.130

0.330

0.370

0.055

8.38

9.40

1.40

0.350

8.89

Notes:

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.

Base Plane

A A2

4. Dimension B1 does not include dambar

protrusion/intrusion.

5. Controlling dimension: Inches.

6. General appearance spec. should be based on

final visual inspection spec.

Mounting Plane

e₁

e_A

B₁

28-pin Small Outline J Band

Dimension in Inches

Min. Nom. Max. Min. Nom. Max.

Dimension in mm

Symbol

3.56

0.140

0.027

0.095 0.100 0.105

0.028 0.032

0.69

2.41

0.66

0.41

0.20

2.54

0.71

2.67

0.81

0.56

0.36

18.54

7.75

1.42

0.026

0.016 0.018

0.46

0.022

0.014

0.730

0.010

0.710

0.25

0.008

18.03

7.49

1.12

0.300

0.050

0.305

0.056

7.62

1.27

0.295

0.044

0.285

0.245 0.265

6.22

8.31

6.73

8.56

7.24

8.81

0.327 0.337 0.347

H_E

0.097

0.045

0.004

1.96

2.21

0.077 0.087

2.46

1.14

0.10

Notes:

1. Dimensions D Max. & S include mold flash

or tie bar burrs.

2. Dimension b does not include dambar

protrusion/intrusion.

£c

3. Dimensions D & E include mold mismatch

and are determined at the mold parting line.

Seating Plane

4. Controlling dimension: Inches.

5. General appearance spec. should be based

on final visual inspection spec.

Publication Release Date: May 1997

Revision A14

- 9 -

1...6 7 8910 11

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