UT62256CSC-35 datasheet(1/12 Pages) ETC

Part #	UT62256CSC-35

Description	32K X 8 BIT LOW POWER CMOS SRAM

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UTRON

UT62256C

Rev. 1.0

32K X 8 BIT LOW POWER CMOS SRAM

____________________________________________________________________________________________

UTRON TECHNOLOGY INC.

P80027

1F, No. 11, R&D Rd. II, Science-Based Industrial Park, Hsinchu, Taiwan, R. O. C.

TEL: 886-3-5777882

FAX: 886-3-5777919

1



FEATURES

Access time : 35/70ns (max.)

Low power consumption:

Operating : 40/30 mA (typical.)

Standby : 3mA (typical) normal

2uA (typical) L-version

1uA (typical) LL-version

Single 5V power supply

All inputs and outputs are TTL compatible

Fully static operation

Three state outputs

Data retention voltage : 2V (min.)

Package : 28-pin 600 mil PDIP

28-pin 330 mil SOP

28-pin 8mmx13.4mm STSOP

FUNCTIONAL BLOCK DIAGRAM

COLUMNI/O

COLUMNDECODER

ROW

DECODER

I/O

CONTROL

LOGIC

CONTROL

A4

I/O1

VSS

VCC

WE

OE

CE

I/O8

.

...

. .

.

A3

A14

A13

A12

A7

A6

A5

A8

A9

A2 A1 A0

A10

...

MEMORYARRAY

512ROWS×512COLUMNS

A11

PIN DESCRIPTION

SYMBOL

DESCRIPTION

A0 - A14

Address Inputs

I/O1 - I/O8

Data Inputs/Outputs

CE

Chip Enable Input

WE

Write Enable Input

OE

Output Enable Input

VCC

Power Supply

VSS

Ground

GENERAL DESCRIPTION

The UT62256C is a 262,144-bit low power

CMOS static random access memory

organized as 32,768 words by 8 bits. It is

fabricated using high performance, high

reliability CMOS technology.

The UT62256C is designed for high-speed

and low power application. It is particularly

well suited for battery back-up nonvolatile

memory application.

The UT62256C operates from a single 5V

power supply and all inputs and outputs are

fully TTL compatible

PIN CONFIGURATION

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O1

I/O2

Vcc

A8

A9

A11

A10

I/O8

I/O7

I/O6

I/O5

I/O4

I/O3

Vss

PDIP/SOP

28

14

13

12

11

10

9

8

7

6

5

4

3

2

1

17

16

15

20

19

18

22

23

24

25

26

27

21

CE

WE

OE

A13

A14

I/O4

A11

A9

A8

A13

I/O3

A10

A14

A12

A7

A6

A5

Vcc

I/O8

I/O7

I/O6

I/O5

Vss

I/O2

I/O1

A0

A1

A2

A4

A3

UT62256C

STSOP

28

14

13

12

11

10

9

8

7

6

5

4

3

2

1

17

16

15

20

19

18

22

23

24

25

26

27

21

WE

OE

CE

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