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Rainbow Electronics AT29C040A User Manual

Features, Description, Pin configurations

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Features

Fast Read Access Time – 90 ns

5-volt Only Reprogramming

Sector Program Operation

– Single Cycle Reprogram (Erase and Program)
– 2048 Sectors (256 Bytes/Sector)
– Internal Address and Data Latches for 256 Bytes

Internal Program Control and Timer

Hardware and Software Data Protection

Two 16K Bytes Boot Blocks with Lockout

Fast Sector Program Cycle Time – 10 ms

DATA Polling for End of Program Detection

Low Power Dissipation

– 40 mA Active Current
– 100 µA CMOS Standby Current

Typical Endurance > 10,000 Cycles

Single 5V

± 10% Supply

CMOS and TTL Compatible Inputs and Outputs

Description

The AT29C040A is a 5-volt only in-system Flash Programmable and Erasable Read
Only Memory (PEROM). Its 4 megabits of memory is organized as 524,288 words by
8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology,
the device offers access times up to 90 ns, and a low 220 mW power dissipation.
When the device is deselected, the CMOS standby current is less than 100

µA. The

device endurance is such that any sector can typically be written to in excess of
10,000 times. The programming algorithm is compatible with other devices in Atmel’s
5-volt only Flash family.

4-megabit
(512K x 8)
5-volt Only
256-byte Sector
Flash Memory

AT29C040A

Rev. 0333I–FLASH–05/02

DIP Top View

Pin Configurations

Pin Name

Function

A0 - A18

Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7

Data Inputs/Outputs

NC

No Connect

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

A18

A16

A15

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

I/O1

I/O2

GND

VCC

WE

A17

A14

A13

A8

A9

A11

OE

A10

CE

I/O7

I/O6

I/O5

I/O4

I/O3

PLCC Top View

TSOP Top View – Type 1

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

A18

VCC

WE

A17

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

A18

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