beautypg.com

Rainbow Electronics AT29LV020 User Manual

Features, Description, Pin configurations

background image

1

Features

Single Voltage, Range 3V to 3.6V Supply

3-volt Only Read and Write Operation

Software Protected Programming

Fast Read Access Time - 100 ns

Low Power Dissipation

– 15 mA Active Current
– 40 µA CMOS Standby Current

Sector Program Operation

– Single Cycle Reprogram (Erase and Program)
– 1024 Sectors (256 Bytes/Sector)
– Internal Address and Data Latches for 256 Bytes

Two 8K Bytes Boot Blocks with Lockout

Fast Sector Program Cycle Time - 20 ms

Internal Program Control and Timer

DATA Polling for End of Program Detection

Typical Endurance > 10,000 Cycles

CMOS and TTL Compatible Inputs and Outputs

Commercial and Industrial Temperature Ranges

Description

The AT29LV020 is a 3-volt-only in-system Flash programmable and erasable read
only memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes by
8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device
offers access times to 100 ns with power dissipation of just 54 mW over the commer-
cial temperature range. When the device is deselected, the CMOS standby current is
less than 40

µA. The device endurance is such that any sector can typically be written

to in excess of 10,000 times.

2-megabit
(256K x 8)
3-volt Only
Flash Memory

AT29LV020

Rev. 0565C–FLASH–05/02

PLCC Top View

Pin Configurations

Pin Name

Function

A0 - A17

Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7

Data Inputs/Outputs

NC

No Connect

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

A14

A13

A8

A9

A11

OE

A10

CE

I/O7

4

3

2

1

32

31

30

14

15

16

17

18

19

20

I/O1

I/O2

GND

I/O3

I/O4

I/O5

I/O6

A12

A15

A16

NC

VCC

WE

A17

TSOP Top View

Type 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

A11

A9

A8

A13

A14

A17

WE

VCC

NC

A16

A15

A12

A7

A6

A5

A4

OE

A10

CE

I/O7

I/O6

I/O5

I/O4

I/O3

GND

I/O2

I/O1

I/O0

A0

A1

A2

A3