1

®

FN8109.0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2005. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

X28HC64

64K, 8K x 8 Bit

5 Volt, Byte Alterable EEPROM

FEATURES

• 70ns access time

• Simple byte and page write

—Single 5V supply

—Self-timed

—No erase before write

—No complex programming algorithms

—No overerase problem

• Low power CMOS

—40mA active current max.

—200µA standby current max.

• Fast write cycle times

—64-byte page write operation

—Byte or page write cycle: 2ms typical

—Complete memory rewrite: 0.25 sec. typical

—Effective byte write cycle time: 32µs typical

• Software data protection

• End of write detection

—DATA polling

—Toggle bit

• High reliability

—Endurance: 1 million cycles

—Data retention: 100 years

• JEDEC approved byte-wide pin out

DESCRIPTION

The X28HC64 is an 8K x 8 EEPROM, fabricated with

Intersil’s proprietary, high performance, floating gate

CMOS technology. Like all Intersil programmable non-

volatile memories, the X28HC64 is a 5V only device. It

features the JEDEC approved pinto for byte-wide mem-

ories, compatible with industry standard RAMs.

The X28HC64 supports a 64-byte page write operation,

effectively providing a 32µs/byte write cycle, and

enabling the entire memory to be typically written in 0.25

seconds. The X28HC64 also features DATA Polling and

Toggle Bit Polling, two methods providing early end of

write detection. In addition, the X28HC64 includes a

user-optional software data protection mode that further

enhances Intersil’s hardware write protect capability.

Intersil EEPROMs are designed and tested for appli-

cations requiring extended endurance. Inherent data

retention is greater than 100 years.

PIN CONFIGURATIONS

NC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

WE

NC

OE

CE

X28HC64

Plastic DIP

Flat Pack

CERDIP

SOIC

NC

NC

OE

CE

4

3

2

1 32 31 30

14 15 16 17 18 19 20

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

LCC

PLCC

(Top View)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A 3

A 4

A 5

A 6

A 7

A 12

NC

VCC

NC

WE

A 8

A 9

A11

OE

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

A 2

A 1

A 0

I/O 0

I/O 1

I/O 2

NC

VSS

NC

I/O 3

I/O 4

I/O 5

I/O 6

I/O 7

CE

A10

X28HC64

X28HC64

11

10

14

9

8

7

6

5

2

28

12

13

15

4

3

1

16

20

CE

22

OE

24

17

27

WE

19

21

23

25

18

26

NC

(BOTTOM

VIEW)

PGA

NC

X28HC64

TSOP

NC

NC

Bottom View

Data Sheet

June 1, 2005