AS7C256-15JC datasheet(1/8 Pages) ALSC

Part #	AS7C256-15JC

Description	High Performance 32Kx8 CMOS SRAM

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

Direct Link	https://www.alliancememory.com

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ALLIANCE SEMICONDUCTOR

A

8

A

7

High Performance

32K

×8

CMOS SRAM

AS7C256

AS7C256L

32K

×8 CMOS SRAM (Common I/O)

LOGIC BLOCK DIAGRAM

FEATURES

• Organization: 32,768 words

× 8 bits

• High speed

– 10/12/15/20/25/35 ns address access time

– 3/3/4/5/6/8 ns output enable access time

• Low power consumption

– Active:

660 mW max (10 ns cycle)

– Standby:

11 mW max, CMOS I/O

2.75 mW max, CMOS I/O, L version

– Very low DC component in active power

• 2.0V data retention (L version)

• Equal access and cycle times

• Easy memory expansion with CE and OE inputs

• TTL-compatible, three-state I/O

• 28-pin JEDEC standard packages

– 300 mil PDIP and SOJ

Socket compatible with 7C512 and 7C1024

– 330 mil SOIC

–8

×13.4 TSOP

• ESD protection > 2000 volts

• Latch-up current > 200 mA

SELECTION GUIDE

PIN ARRANGEMENT

256

×128×8

ARRAY

(262,144)

INPUT BUFFER

A0

A1

A2

A3

A4

A5

A6

A14

A

9

A

10

A

11

A

12

A

13

I/O0

I/O7

Vcc

GND

OE

CE

WE

COLUMN DECODER

CONTROL

CIRCUIT

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

Vcc

WE

A13

A8

A9

A11

OE

A10

CE

I/O7

I/O6

I/O5

I/O4

I/O3

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

I/O1

I/O2

GND

16

15

AS7C256-02

AS7C256-01

7C256-10

7C256-12

7C256-15

7C256-20

7C256-25

7C256-35

Unit

Maximum Address Access Time

10

12

15

20

25

35

ns

Maximum Output Enable Access Time

334568

ns

Maximum Operating Current

120

115

110

100

90

80

mA

Maximum CMOS Standby Current

2.0

mA

L

0.5

mA

Vcc

WE

A13

A8

A9

A11

OE

A10

CE

I/O7

I/O6

I/O5

I/O4

I/O3

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

I/O1

I/O2

GND

DIP, SOJ, SOIC

TSOP 8

×13.4

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

AS7C256

9

8

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