2

0601E–EPROM–12/07

AT27BV256

2.1

28-lead SOIC Top View

2.2

32-lead PLCC Top View

Note:

PLCC package pins 1 and 17 are Don’t Connect.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

VPP

A12

A7

A6

A5

A4

A3

A2

A1

A0

O0

O1

O2

GND

VCC

A14

A13

A8

A9

A11

OE

A10

CE

O7

O6

O5

O4

O3

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

A6

A5

A4

A3

A2

A1

A0

NC

O0

A8

A9

A11

NC

OE

A10

CE

O7

O6

2.3

28-lead TSOP (Type 1) Top View

22

23

24

25

26

27

28

1

2

3

4

5

6

7

21

20

19

18

17

16

15

14

13

12

11

10

9

8

OE

A11

A9

A8

A13

A14

VCC

VPP

A12

A7

A6

A5

A4

A3

A10

CE

O7

O6

O5

O4

O3

GND

O2

O1

O0

A0

A1

A2

Atmel’s AT27BV256 has additional features to ensure high quality and efficient production

use. The Rapid Programming Algorithm reduces the time required to program the part and

guarantees reliable programming. Programming time is typically only 100 µs/byte. The Inte-

grated Product Identification Code electronically identifies the device and manufacturer. This

feature is used by industry-standard programming equipment to select the proper program-

ming algorithms and voltages. The AT27BV256 programs exactly the same way as a standard

5V AT27C256R and uses the same programming equipment.

2.

Pin Configurations

Pin Name

Function

A0 - A14

Addresses

O0 - O7

Outputs

CE

Chip Enable

OE

Output Enable

NC

No Connect