W24L257A

- 8 -

PACKAGE DIMENSIONS

28-pin P-DIP Skinny

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

E

0.060

1.52

0.175

4.45

0.010

0.125

0.016

0.130

0.018

0.135

0.022

3.18

0.41

0.25

3.30

0.46

3.43

0.56

0.008

0.120

0.370

0.010

0.130

0.014

0.140

0.20

3.05

0.25

3.30

0.36

3.56

0.293

0.288

0.283

7.44

7.32

7.19

9.40

7.87

7.62

8.13

0.310

0.300

0.320

2.29

2.54

2.79

0.090

0.100

0.110

1

e

a

1.388

1.400

35.26

35.56

0°

15°

0.055

1.40

0.350

0.330

8.38

8.89

15°

0°

4. Dimension B1 does not include dambar

protrusion/intrusion.

5. Controlling dimension: Inches.

A

a

c

E

Base Plane

Mounting Plane

1

A

1

e

L

A

S

1

E

D

1

B

B

28

15

1

14

2

28-pin Small Outline J Band

1

y

1

e

s

1

b

b

c

L

e

Seating Plane

1

2

A

A

A

D

E

H

E

14

15

28

£c

0.36

0.20

0.014

0.008

Symbol

Min. Nom. Max.

Max.

Nom.

Min.

Dimension in Inches

Dimension in mm

A

b

c

D

e

L

y

A

A

S

1

1

2

E

0.010

0.25

0.140

3.56

0.027

0.095

0.016

0.100

0.018

0.105

0.022

2.41

0.41

0.69

2.54

0.46

2.67

0.56

0.077

0.004

0

10

0.710

0.087

0.730

0.097

1.96

18.03

2.21

18.54

2.46

0.285

0.265

0.245

7.24

6.73

6.22

0

0.10

7.75

7.62

7.49

0.305

0.300

0.295

8.31

8.56

8.81

0.327

0.337

0.347

1. Dimensions D Max. & S include mold flash

or tie bar burrs.

2. Dimension b does not include dambar

protrusion/intrusion.

4. Controlling dimension: Inches.

5. General appearance spec. should be based

on final visual inspection spec.

Notes:

3. Dimensions D & E include mold mismatch

and are determined at the mold parting line.

e

0.81

0.71

0.66

0.032

0.028

0.026

0.044

0.050

0.056

1.12

1.27

1.42

0.045

1.14

10

θ