1

4-Megabit

(512K x 8)

Single 2.7-volt

Flash Memory

AT49BV040

AT49BV040T

AT49LV040

AT49LV040T

AT49BV/LV040

Features

µs/Byte Typical

– 25 mA Active Current

–50

µA CMOS Standby Current

– 8 x 8 mm CBGA

– 8 x 14 mm V-TSOP

Description

The AT49BV/LV040 are 3-volt-only, 4-megabit Flash memories organized as 524,288

words of 8-bits each. Manufactured with Atmel’s advanced nonvolatile CMOS tech-

nology, the devices offer access times to 120 ns with power dissipation of just 90 mW

over the commercial temperature range. When the device is deselected, the CMOS

standby current is less than 50

µA.

The device contains a user-enabled “boot block” protection feature. Two versions of

the feature are available: the AT49BV/LV040 locates the boot block at lowest order

addresses (“bottom boot”); the AT49BV/LV040T locates it at highest order addresses

(“top boot”).

0679AX-A–9/97

Pin Configurations

Pin Name

Function

A0 - A18

Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7

Data Inputs/Outputs

CBGA Top View

A

B

C

D

E

F

1

234567

GND

A17

A10

A14

A16

A15

I/O6

I/O7

NC

A13

A11

A12

VCC

I/O4

I/O5

A9

WE

A8

VCC

NC

NC

NC

NC

NC

I/O2

NC

I/O3

NC

A7

A18

OE

I/O0

I/O1

A6

A4

A5

GND

CE

A0

A3

A1

A2

PLCC Top View

V - TSOP Top View (8 x 14 mm) or

T - TSOP Top View (8 x 20 mm)

(continued)