MX66C256

Rev. 1.1, Jan., 2000

P/N DS0035

1

Macronix America Inc. USA 1338 Ridder Park Dr., San Jose, CA 95131

Tel (408)453-8088

Fax (408)451-0876

www.macronix.com

Very Low Power 32k x 8 CMOS SRAM

PIN CONFIGURATIONS

Address

Input

Buffer

Row

Decoder

Memory Array

512 x 512

Column I/O

Write Driver

Sense Amp

Column Decoder

Data

Buffer

Output

Address Input Buffer

A3 A2 A1 A0 A10

Data

Buffer

Input

Control

Gnd

Vdd

OE

WE

CE

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

A12

A11

A9

A8

A7

A6

A5

8

8

8

8

12

64

512

BLOCK DIAGRAM

512

18

A14

A13

A4

FEATURES

Vcc operation voltage : 5.0V

Very low power consumption :

50 mA (Max.) write current

40 mA (Max.) read current

0.4uA (Typ.) CMOS standby current

High speed access time :

- 70

70ns (Max.)

- 100

100ns (Max.)

Input levels are CMOS-compatible

Automatic power down when chip is deselected

Three state outputs

Fully static operation

Data retention supply voltage as low as 2.0V

Easy expansion with CE and OE options

The MX66C256 is a high performance, very low power

CMOS Static Random Access Memory organized as

32,768 words by 8 bits and operates at 5.0V supply

voltage.

Advanced CMOS technology and circuit techniques

provide both high speed and low power features with a

typical CMOS standby current of 0.4uA and maximum

access time of 70ns and 100 ns in 5V operation.

Easy memory expansion is provided by an active LOW

chip enable(CE), and active LOW output enable (OE)

and three-state output drivers.

The MX66C256 has an automatic power down feature,

reducing the power consumption significantly when chip

is deselected.

The MX66C256 is available in the JEDEC standard 28

pin 330mil Plastic SOP, and 8mmx13.4mm TSOP

(normal type).

DESCRIPTION

A10

CE

DQ7

DQ6

DQ5

DQ4

DQ3

GND

DQ2

DQ1

DQ0

A0

A1

A2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

OE

A11

A9

A8

A13

WE

VCC

A14

A12

A7

A6

A5

A4

A3

28-TSOP

28

27

26

25

24

23

22

21

20

19

18

17

16

15

VCC

WE

A13

A8

A9

A11

OE

A10

CE

DQ7

DQ6

DQ5

DQ4

DQ3

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

DQ0

DQ1

DQ2

GND

28-SOP

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14