2

Rev. A

03/24/04

IS65C256

PIN CONFIGURATION

32-Pin SOP

PIN CONFIGURATION

32-Pin TSOP (Type 1)

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

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

I/O1

I/O2

GND

WE

A13

A8

A9

A11

OE

A10

CS

I/O7

I/O6

I/O5

I/O4

I/O3

22

23

24

25

26

27

28

1

2

3

4

5

6

7

21

20

19

18

17

16

15

14

13

12

11

10

9

8

OE

A11

A9

A8

A13

WE

A14

A12

A7

A6

A5

A4

A3

A10

CS

I/O7

I/O6

I/O5

I/O4

I/O3

GND

I/O2

I/O1

I/O0

A0

A1

A2

PIN DESCRIPTIONS

A0-A14

Address Inputs

CS

Chip Select Input

OE

Output Enable Input

WE

Write Enable Input

I/O0-I/O7

Input/Output

Power

GND

Ground

TRUTH TABLE

Mode

WE

WE

WE

WE

WE

CS

CS

CS

CS

CS

OE

OE

OE

OE

OE I/O Operation

Not Selected

X

H

X

High-Z

(Power-down)

Output Disabled H

L

H

High-Z

Read

H

L

L

Write

L

L

X

Symbol

Parameter

Value

Unit

Terminal Voltage with Respect to GND

–0.5 to +7.0

V

Temperature Under Bias

–55 to +125

°C

Storage Temperature

–65 to +150

°C

Power Dissipation

0.5

W

DC Output Current (LOW)

20

mA

Note:

1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress

rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of

this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.