IS45LV44002B-50JA1 datasheet(2/20 Pages) ISSI

Part #	IS45LV44002B-50JA1

Description	4M x 4 (16-MBIT) DYNAMIC RAM WITH EDO PAGE MODE

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Manufacturer	ISSI [Integrated Silicon Solution, Inc]

Direct Link	http://www.issi.com

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

Rev. A

09/12/05

IS45LV44002B

ISSI®

FUNCTIONAL BLOCK DIAGRAM

OE

WE

CAS

WE

DATA I/O BUS

COLUMN DECODERS

SENSE AMPLIFIERS

MEMORY ARRAY

4,194,304 x 4

CAS

CONTROL

LOGIC

WE

CONTROL

LOGICS

OE

CONTROL

LOGIC

I/O0-I/O3

RAS

A0-A10

RAS

CLOCK

GENERATOR

REFRESH

COUNTER

ADDRESS

BUFFERS

TRUTH TABLE

Function

RAS

CAS

WE

OE

Address tR/tC

I/O

Standby

H

X

High-Z

Read

L

H

L

ROW/COL

DOUT

Write: Word (Early Write)

L

X

ROW/COL

DIN

Read-Write

L

H

→LL→H

ROW/COL

DOUT, DIN

EDO Page-Mode Read

1st Cycle:

L

H

→L

H

L

ROW/COL

DOUT

2nd Cycle:

L

H

→L

H

L

NA/COL

DOUT

EDO Page-Mode Write

1st Cycle:

L

H

→L

L

X

ROW/COL

DIN

2nd Cycle:

L

H

→L

L

X

NA/COL

DIN

EDO Page-Mode

1st Cycle:

L

H

→LH→LL→H

ROW/COL

DOUT, DIN

Read-Write

2nd Cycle:

L

H

→LH→LL→H

NA/COL

DOUT, DIN

Hidden Refresh

Read

L

→H→L

L

H

L

ROW/COL

DOUT

Write(1)

L

→H→L

L

X

ROW/COL

DOUT

RAS-Only Refresh

L

H

X

ROW/NA

High-Z

CBR Refresh

H

→L

L

X

High-Z

Note:

1. EARLY WRITE only.

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IS45LV44002B-50JA1 Datasheet(PDF) 2 Page - Integrated Silicon Solution, Inc

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