W24256S-70LL datasheet(8/10 Pages) WINBOND

Part #	W24256S-70LL

Description	32K X 8 CMOS STATIC RAM

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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Preliminary W24256

- 8 -

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.

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

B1

1

e

E1

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

28-pin SOP Wide Body

2

1

A

28

15

14

1

e

S

E

H

b

Seating Plane

A A

y

L

e

c

See Detail F

D

E

1

e

Detail F

1. Dimensions D Max. & S include mold flash

or tie bar burrs.

2. Dimension b does not include dambar

protrusion/intrusion.

3. Dimensions D & E include mold mismatch

and determined at the mold parting line.

.

0.25

0.20

0.010

0.008

Notes:

Symbol

Min. Nom. Max.

Max.

Nom.

Min.

Dimension in Inches

Dimension in mm

0.014

0.36

0.112

2.85

0.004

0.093

0.014

0.098

0.016

0.103

0.020

2.36

0.36

0.10

2.49

0.41

2.62

0.51

0.059

0.004

0

10

0.713

0.067

0.733

0.075

1.50

18.11

1.70

18.62

1.91

0.477

0.465

0.453

12.12

11.81

11.51

0

10

0.10

8.53

8.41

8.28

0.336

0.331

0.326

0.71

0.91

1.12

0.028

0.036

0.044

4. Controlling dimension: Inches.

5. General appearance spec should be based

on final visual inspection spec.

1.12

1.27

1.42

0.044

0.050

0.056

1.19

0.047

A

b

c

D

e

HE

L

y

A

L E

1

2

E

S

θ

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