W49F020Q-90 datasheet(2/21 Pages) WINBOND

Part #	W49F020Q-90

Description	256K X 8 CMOS FLASH MEMORY

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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Preliminary W49F020

- 2 -

PIN CONFIGURATIONS

1

2

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5

6

7

8

9

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16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

DQ0

DQ1

DQ2

GND

A7

A6

A5

A4

A3

A2

A1

A0

A16

A15

A12

V

WE

A14

A13

A8

A9

A11

OE

A10

CE

DQ7

DQ6

DQ5

DQ4

DQ3

DD

A17

32-pin

DIP

5

6

7

9

10

11

12

13

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

29

28

27

26

25

24

23

22

21

30

31

32

1

2

3

4

8

20

19

18

17

16

15

14

D

Q

1

D

Q

2

G

N

D

Q

3

D

Q

4

D

Q

5

D

Q

6

A14

A13

A8

A9

A11

OE

A10

CE

DQ7

A

1

2

A

1

6

V

D

/

W

E

A

1

5

32-pin

PLCC

A

1

7

N

C

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

OE

A10

CE

DQ7

DQ6

DQ5

DQ4

DQ3

32-pin

TSOP

A15

A12

A7

A6

A5

A4

V

WE

A14

A13

A8

DD

A11

A9

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

A16

A17

NC

BLOCK DIAGRAM

CONTROL

OUTPUT

BUFFER

DECODER

CE

OE

WE

A0

.

A17

.

DQ0

VDD

VSS

DQ7

02000

01FFF

00000

MAIM MEMORY

248K BYTES

BOOT BLOCK

8K BYTES

3FFFF

W49F020

PIN DESCRIPTION

SYMBOL

PIN NAME

A0

−A17

Address Inputs

DQ0

−DQ7

Data Inputs/Outputs

CE

Chip Enable

OE

Output Enable

WE

Write Enable

VDD

Power Supply

GND

Ground

NC

No Connection

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