AS4SD4M16DG-8/IT 参数 Datasheet PDF下载

SDRAM

Austin Semiconductor, Inc.

FUNCTIONAL BLOCK DIAGRAM

4 Meg x 16 SDRAM

AS4SD4M16

CKE

CLK

CS\

WE\

CAS\

RAS\

CONTROL

LOGIC

COMMAND

DECODE

BANK1

BANK2 BANK3

MODE REGISTER

REFRESH

12

COUNTER

12

1

2

ROW

ADDRESS

MUX

12

12

BANK0

ROW-

ADDRESS

LATCH &

DECODER

4096

BANK 0

MEMORY

ARRAY

(4,096 X 256 X 16)

SENSE AMPLIFIERS

2

2

DQML, DQMH

16

DATA

OUTPUT

REGISTER

16

2

A0,

A10,

BA

14

ADDRESS

REGISTER

2

BANK

CONTROL

LOGIC

I/O GATING

DQM MASK LOGIC

READ DATA LATCH

WRITE DRIVERS

256

(X16)

COLUMN

DECODER

4096

DQ0-DQ15

16

DATA

INPUT

REGISTER

8

COLUMN-

ADDRESS

COUNTER/

LATCH

8

AS4SD4M16

Rev. 2.1 6/05

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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