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29C020

2-Megabit (256K x 8) 5-volt Only CMOS Flash Memory

Atmel Corporation

29C020 Datasheet PDF : 17 Pages

1 2 3 4 5 6 7 8 9 10 Next Last

Features

• Fast Read Access Time – 70 ns

• 5-volt Only Reprogramming

• Sector Program Operation

– Single Cycle Reprogram (Erase and Program)

– 1024 Sectors (256 Bytes/Sector)

– Internal Address and Data Latches for 256 Bytes

• Internal Program Control and Timer

• Hardware and Software Data Protection

• Two 8K 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

• Commercial and Industrial Temperature Ranges

Description

The AT29C020 is a 5-volt-only in-system Flash programmable and erasable read-only

memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes. Manu-

factured with Atmel’s advanced nonvolatile CMOS technology, the device offers

access times to 70 ns with power dissipation of just 220 mW over the commercial tem-

perature range. When the device is deselected, the CMOS standby current is less

than 100 µA. Device endurance is such that any sector can typically be written to in

excess of 10,000 times.

Pin Configurations

Pin Name

A0 - A17

I/O0 - I/O7

Function

Addresses

Chip Enable

Output Enable

Write Enable

Data Inputs/Outputs

No Connect

TSOP Top View

Type 1

A11 1

A9 2

A8 3

A13 4

A14 5

A17 6

WE 7

VCC 8

NC 9

A16 10

A15 11

A12 12

A7 13

A6 14

A5 15

A4 16

32 OE

31 A10

30 CE

29 I/O7

28 I/O6

27 I/O5

26 I/O4

25 I/O3

24 GND

23 I/O2

22 I/O1

21 I/O0

20 A0

19 A1

18 A2

17 A3

DIP Top View

NC 1

A16 2

A15 3

A12 4

A7 5

A6 6

A5 7

A4 8

A3 9

A2 10

A1 11

A0 12

I/O0 13

I/O1 14

I/O2 15

GND 16

32 VCC

31 WE

30 A17

29 A14

28 A13

27 A8

26 A9

25 A11

24 OE

23 A10

22 CE

21 I/O7

20 I/O6

19 I/O5

18 I/O4

17 I/O3

PLCC Top View