AT45D041

1

4-Megabit

5-volt Only

Serial

DataFlash

™

AT45D041

Features

- Single Cycle Reprogram (Erase and Program)

- 2048 Pages (264 Bytes/Page) Main Memory

Non-Volatile Memory

µs Typical Page to Buffer Transfer Time

- 15 mA Active Read Current Typical

-20

µA CMOS Standby Current Typical

Description

The AT45D041 is a 5-volt only, serial interface Flash memory suitable for in-system

reprogramming. Its 4,325,376 bits of memory are organized as 2048 pages of 264-

bytes each. In addition to the main memory, the AT45D041 also contains two 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 memories 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 facil-

itates hardware layout, increases system reliability, minimizes switching noise, and

0803C-D–6/97

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

(continued)

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

Note: PLCC package pins 16

and 17 are DON’T CONNECT.