28F020 datasheet(3/38 Pages) INTEL

3 / 38 page

28F020

CONTENTS

PAGE

1.0 APPLICATIONS ..............................................5

2.0 PRINCIPLES OF OPERATION .......................8

2.1 Integrated Stop Timer ..................................8

2.2 Write Protection ...........................................9

2.2.1 Bus Operations......................................9

2.2.1.1 Read...............................................9

2.2.1.2 Output Disable ..............................10

2.2.1.3 Standby ........................................10

2.2.1.4 Intelligent Identifier Operation .......10

2.2.1.5 Write .............................................10

2.2.2 Command Definitions ..........................10

2.2.2.1 Read Command............................11

2.2.2.2 Intelligent Identifier Command ......11

2.2.2.3 Set-Up Erase/Erase Commands ...12

2.2.2.4 Erase Verify Command.................12

2.2.2.5 Set-Up Program/Program

Commands ..................................12

2.2.2.6 Program Verify Command ............12

2.2.2.7 Reset Command...........................13

2.2.3 Extended Erase/Program Cycling........13

2.2.4 Quick-Pulse Programming Algorithm ...13

2.2.5 Quick-Erase Algorithm.........................13

3.0 DESIGN CONSIDERATIONS ........................16

3.1 Two-Line Output Control ............................16

3.2 Power Supply Decoupling ..........................16

3.3 VPP Trace on Printed Circuit Boards...........16

3.4 Power-Up/Down Protection ........................16

3.5 28F020 Power Dissipation .........................16

4.0 ELECTRICAL SPECIFICATIONS..................18

4.1 Absolute Maximum Ratings ........................18

4.2 Operating Conditions..................................18

4.3 Capacitance ...............................................18

4.4 DC Characteristics—TTL/NMOS

Compatible—Commercial Products...........19

4.5 DC Characteristics—CMOS Compatible—

Commercial Products ................................20

4.6 DC Characteristics—TTL/NMOS

Compatible—Extended Temperature

Products ....................................................22

4.7 DC Characteristics—CMOS Compatible—

Extended Temperature Products ...............24

4.8 AC Characteristics—Read Only

Operations—Commercial and Extended

Temperature Products...............................28

4.9 AC Characteristics—Write/Erase/Program

Only Operations—Commercial and

Extended Temperature Products ...............30

4.10 Erase and Programming Performance.....31

4.11 AC Characteristics—Alternate CE#

Controlled Writes—Commercial and

Extended Temperature Products ...............35

5.0 ORDERING INFORMATION.........................38

6.0 ADDITIONAL INFORMATION ......................38

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