X84161/641/129

2

PIN DESCRIPTIONS

Chip Enable (CE)

The Chip Enable input must be LOW to enable all read/

write operations. When CE is HIGH, the chip is dese-

lected, the I/O pin is in the high impedance state, and

unless a nonvolatile write operation is underway, the

device is in the standby power mode.

Output Enable (OE)

The Output Enable input must be LOW to enable the out-

put buffer and to read data from the device on the I/O line.

Write Enable (WE)

The Write Enable input must be LOW to write either data

or command sequences to the device.

Data In/Data Out (I/O)

Data and command sequences are serially written to or

serially read from the device through the I/O pin.

Write Protect (WP)

When the Write Protect input is LOW, nonvolatile writes

to the device are disabled. When WP is HIGH, all func-

tions, including nonvolatile writes, operate normally. If a

nonvolatile write cycle is in progress, WP going LOW will

have no effect on the cycle already underway, but will

inhibit any additional nonvolatile write cycles.

PIN CONFIGURATIONS: Drawings are to the same scale, actual package sizes are shown in inches:

VCC

NC

OE

WE

CE

I/O

WP

VSS

1

2

3

4

8

7

6

5

8-LEAD SOIC

7008 FRM F01

1

2

3

4

5

6

7

8

14

13

12

11

10

9

14-LEAD SOIC

CE

I/O

NC

NC

NC

WP

VSS

V CC

NC

NC

NC

NC

OE

WE

PIN NAMES

7008 FRM T01

I/O

Data Input/Output

CE

Chip Enable Input

OE

Output Enable Input

WE

Write Enable Input

WP

Write Protect Input

Supply Voltage

Ground

NC

No Connect

PACKAGE

SELECTION GUIDE

7008 FRM T0A

84161

8-Lead PDIP

8-Lead SOIC

8-Lead TSSOP

84641

8-Lead PDIP

8-Lead SOIC

20-Lead TSSOP

84129

8-Lead PDIP

14-Lead SOIC

28-Lead TSSOP

1

2

3

4

5

6

7

20

19

18

17

16

15

14

20-LEAD TSSOP

CE

I/O

NC

NC

NC

WP

VSS

VCC

NC

NC

NC

NC

OE

WE

8

9

10

13

12

11

NC

NC

NC

NC

NC

NC

1

2

3

4

5

6

7

20

19

18

17

16

15

28-LEAD TSSOP

NC

NC

WP

NC

NC

NC

OE

WE

NC

NC

8

9

10

I/O

CE

NC

NC

NC

CE

CE

NC

NC

NC

NC

NC

NC

11

12

13

14

21

22

23

24

25

26

27

28

X84161

X84641

X84129

.190 in.

.230 in.

.230 in.

.390 in.

.250 in.

.394 in.

.252 in.

. 252 in.

X84129

X84641

NC

NC

NC

OE

NC

CE

I/O

1

2

3

4

8

7

6

5

8-LEAD TSSOP

X84161

.114 in.

.252 in.

WE

WP

VSS

8-LEAD PDIP