AS4LC2M8S1-12TC datasheet(8/28 Pages) ALSC

Part #	AS4LC2M8S1-12TC

Description	3.3V 2M x 8/1M x 16 CMOS synchronous DRAM

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Manufacturer	ALSC [Alliance Semiconductor Corporation]

Direct Link	https://www.alliancememory.com

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ALLIANCE SEMICONDUCTOR

7/5/00

AS4LC2M8S1

AS4LC1M16S1

AC parameters common to all waveforms

Sym

Parameter

CAS

latency

–7

–8

–10

Unit

Notes

Min

Max

Min

Max

Min

Max

tAC CLK to valid output delay

3–

5.5

–

6

–

6

ns

6

2–

8.5

–

7

–

6

ns

6,8

1

–

18

–

22

–

22

ns

6,8

tAH Address hold time

–

1

–

1

–

1

ns

7

tAS Address setup time

2

–

2

–

2

–

ns

7

tBDL Last data-in to burst stop

0

–

0

–

0

–

tCK

9

tCCD

Read/write command to

read/write command

1–

1

–

1

–

tCK

9

tCDL

Last data-in to new

column address delay

1–

1

–

1

–

tCK

9

tCH CLK high-level width

2.75

–

3

–

3

–

ns

7

tCK CLK cycle time

3

7

1000

8

1000

10

1000

ns

10

2

8.7

1000

10

1000

12

1000

ns

10

1

20

1000

25

1000

25

1000

ns

10

tCKED

CKE to CLOCK disable or

power-down entry mode

1–

1

–

1

–

tCK

tCKH CKE hold time

1

–

1

–

1

–

ns

tCKS CKE setup time

2

–

2

–

2

–

ns

tCL

CLK low-level width

2.75

–

3

–

3.5

–

ns

7

tCMH

CS, RAS, CAS, WE, DQM

hold time

1–

1

–

1

–

ns

tCMS

CS, RAS, CAS, WE, DQM

setup time

2–

2

–

2

–

ns

tDAL

Data-in to ACTIVE

command

35

–

5

–

5

–

tCK

5,11

25

–

5

–

5

–

tCK

5,11

14

–

4

–

4

–

tCK

5,11

tDH Data in hold time

1

–

1

–

1

–

ns

tDPL Data in to PRECHARGE

2

–

2

–

2

–

tCK

12

tDQD DQM to input data delay

1

–

1

–

1

–

tCK

9

tDQM

DQM to data mask during

writes

0–

0

–

0

–

tCK

9

tDQZ

DQM to data high Z

during reads

2–

2

–

2

–

tCK

9

tDS Data in setup time

2

–

2

–

2

–

ns

tDWD

Write command to input

data delay

0–

0

–

0

–

tCK

9

tHZ

Data-out high-impedance

time

3–

5.5

–

6

–

9

ns

13

2–

8.5

–

9

–

9

ns

13

1

–

18

–

22

–

22

ns

13

tLZ

Data-out low-impedance

time

1–

1

–

1

–

ns

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