AT45DB081

1

8-Megabit

2.7-volt Only

Serial

DataFlash

™

AT45DB081

Features

– Single Cycle Reprogram (Erase and Program)

– 4096 Pages (264 Bytes/Page) Main Memory

Non-Volatile Memory

µs Typical Page to Buffer Transfer Time

– 4 mA Active Read Current Typical

–2

µA CMOS Standby Current Typical

Description

The AT45DB081 is a 2.7-volt only, serial interface Flash memory suitable for in-sys-

tem reprogramming. Its 8,650,752 bits of memory are organized as 4096 pages of

264-bytes each. In addition to the main memory, the AT45DB081 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

0870A-A–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)

TSOP Top View

Type 1

1

2

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16

32

31

30

29

28

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26

25

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20

19

18

17

RDY/BUSY

RESET

WP

NC

NC

NC

VCC

GND

NC

NC

NC

NC

CS

SCK

SI

SO

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

NC

SOIC

1

2

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9

10

11

12

13

14

28

27

26

25

24

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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