IS42S16128 datasheet(7/75 Pages) ISSI

Part #	IS42S16128

Description	128K Words x 16 Bits x 2 Banks (4-MBIT) SYNCHRONOUS DYNAMIC RAM

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

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IS42S16128

ISSI®

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

7

Rev. A

03/13/00

OPERATING FREQUENCY / LATENCY RELATIONSHIPS

-8

-10

-12

Symbol

Parameter

Min. Typ. Max.

Units

—

Clock Cycle Time

8

10

25

10

15

30

12

17

34

ns

—

Operating Frequency

125

100

40

100

65

33

83

58

29

MHz

tCAC

CAS Latency

3

2

1

3

2

1

3

2

1

cycle

tRCD

Active Command To Read/Write Command Delay Time

3

2

1

3

2

1

3

2

1

cycle

tRAC

RAS Latency (tRCD + tCAC)

6

4

2

6

4

2

6

4

2

cycle

tRC

Command Period (REF to REF / ACT to ACT)

9

5

2

9

6

3

9

7

4

cycle

tRAS

Command Period (ACT to PRE)

6

3

1

6

4

2

6

5

3

cycle

tRP

Command Period (PRE to ACT)

3

2

1

3

2

1

3

2

1

cycle

tRRD

Command Period (ACT[0] to ACT [1])

3

2

1

3

2

1

3

2

1

cycle

tCCD

Column Command Delay Time

1

cycle

(READ, READA, WRIT, WRITA)

tDPL

Input Data To Precharge Command Delay Time

1

cycle

tDAL

Input Data To Active/Refresh Command Delay Time

4

3

2

4

3

2

4

3

2

cycle

(DuringAuto-Precharge)

tRBD

Burst Stop Command To Output in HIGH-Z Delay Time

3

2

1

3

2

1

3

2

1

cycle

(Read)

tWBD

Burst Stop Command To Input in Invalid Delay Time

0

cycle

(Write)

tRQL

Precharge Command To Output in HIGH-Z Delay Time

3

2

1

3

2

1

3

2

1

cycle

(Read)

tWDL

Precharge Command To Input in Invalid Delay Time

0

cycle

(Write)

tPQL

Last Output To Auto-Precharge Start Time (Read)

–2

–10

–2

–10

–2

–1

0

cycle

tQMD

DQM To Output Delay Time (Read)

2

cycle

tDMD

DQM To Input Delay Time (Write)

0

cycle

tMCD

Mode Register Set To Command Delay Time

2

cycle

AC TEST CONDITIONS (Input/Output Reference Level: 1.4V)

Input

Output Load

2.0V

1.4V

0.8V

CLK

INPUT

OUTPUT

tCHI

tCH

tAC

tOH

tCS

tCK

tCL

2.0V

1.4V

0.8V

I/O

500

Ω

+1.4V

50 pF

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IS42S16128 Datasheet(PDF) 7 Page - Integrated Silicon Solution, Inc

IS42S16128 Datasheet(HTML) 7 Page - Integrated Silicon Solution, Inc

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