1

Features

– Single Cycle Reprogram (Erase and Program)

– 2048 Pages (264 Bytes/Page) Main Memory

While Reprogramming of Non-Volatile Memory

µµµµs Typical Page to Buffer Transfer Time

– 4 mA Active Read Current Typical

–8

µµµµA CMOS Standby Current Typical

Description

The AT45DB041 is a 2.7-volt only, serial interface Flash memory suitable for in-sys-

tem reprogramming. Its 4,325,376 bits of memory are organized as 2048 pages of

264-bytes each. In addition to the main memory, the AT45DB041 also contains two

SRAM data buffers of 264-bytes each. The buffers allow receiving of data while a

page in the main memory is being reprogrammed. Unlike conventional Flash memo-

ries that are accessed randomly with multiple address lines and a parallel interface,

the DataFlash uses a serial interface to sequentially access its data. The simple serial

interface facilitates hardware layout, increases system reliability, minimizes switching

4-Megabit

2.7-volt Only

Serial

DataFlash

®

AT45DB041

Rev. 0669D–07/98

Pin Configurations

Pin Name

Function

CS

Chip Select

SCK

Serial Clock

SI

Serial Input

SO

Serial Output

WP

Hardware Page Write

Protect Pin

RESET

Chip Reset

RDY/BUSY

Ready/Busy

PLCC

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

SCK

SI

SO

NC

NC

NC

NC

NC

NC

WP

RESET

RDY/BUSY

NC

NC

NC

NC

NC

NC

TSOP Top View

Type 1

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

RDY/BUSY

RESET

WP

NC

NC

VCC

GND

NC

NC

NC

CS

SCK

SI

SO

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

SOIC

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

GND

NC

NC

CS

SCK

SI

SO

NC

NC

NC

NC

NC

NC

NC

VCC

NC

NC

WP

RESET

RDY/BUSY

NC

NC

NC

NC

NC

NC

NC

NC

CBGA Top View

Through Package

A

B

C

D

E

1

2345

NC

NC

NC

NC

NC

VCC

WP

RESET

NC

NC

GND

RDY/BSY

SI

NC

NC

SCK

CS

SO

NC

NC

NC

NC

NC

NC

(continued)

Note: PLCC package pins 16

and 17 are DON’T CONNECT.