IS41LV16257B-60KL datasheet(8/20 Pages) ISSI

Part #	IS41LV16257B-60KL

Description	256K x 16 (4-MBIT) DYNAMIC RAM WITH FAST PAGE MODE

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

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IS41LV16257B

ISSI®

8

Integrated Silicon Solution, Inc. — 1-800-379-4774

Rev. B

04/22/05

AC CHARACTERISTICS(1,2,3,4,5,6) (Recommended Operating Conditions unless otherwise noted.)

-35

-60

Symbol Parameter

Min.

Max.

Min.

Max.

Units

tACH

Column-Address Setup Time to

CAS

15

—

15

—

ns

Precharge during WRITE Cycle

tOEH

OE Hold Time from WE during

8

—

15

—

ns

READ-MODIFY-WRITE cycle(18)

tDS

Data-In Setup Time(15, 22)

0—

0

—

ns

tDH

Data-In Hold Time(15, 22)

6—

10

—

ns

tRWC

READ-MODIFY-WRITE Cycle Time

80

—

140

—

ns

tRWD

RAS to WE Delay Time during

46

—

80

—

ns

READ-MODIFY-WRITE Cycle(14)

tCWD

CAS to WE Delay Time(14, 20)

25

—

36

—

ns

tAWD

Column-Address to

WE Delay Time(14)

30

—

49

—

ns

tPC

Fast Page Mode READ or WRITE

14

—

25

—

ns

Cycle Time(24)

tRASP

RAS Pulse Width

35

100K

60

100K

ns

tCPA

Access Time from

CAS Precharge(15)

—20

—

35

ns

tPRWC

READ-WRITE Cycle Time(24)

45

—

60

—

ns

tOFF

Output Buffer Turn-Off Delay from

3

10

3

15

ns

CAS or RAS(13,15,19,29)

tWHZ

Output Disable Delay from

WE

310

3

15

ns

tCLCH

Last

CAS going LOW to First CAS

10

—

10

—

ns

returning HIGH(23)

tCSR

CAS Setup Time (CBR REFRESH)(30, 20)

8—

10

—

ns

tCHR

CAS Hold Time (CBR REFRESH)(30, 21)

8—

10

—

ns

tORD

OE Setup Time prior to RAS during

0

—

0

—

ns

HIDDEN REFRESH Cycle

tREF

Refresh Period (512 Cycles)

—

8

—

8

ms

tT

Transition Time (Rise or Fall)(2, 3)

250

2

50

ns

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IS41LV16257B-60KL Datasheet(PDF) 8 Page - Integrated Silicon Solution, Inc

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