TMS44400, TMS44400P, TMS46400, TMS46400P

1048576-WORD BY 4-BIT

DYNAMIC RANDOM-ACCESS MEMORIES

SMHS562C – MAY 1995 – REVISED NOVEMBER 1996

2

POST OFFICE BOX 1443

A0

A1

A2

A3

A4

A5

A6

A7

A8

RAS

CAS

W

OE

9

10

11

12

14

15

16

17

18

4

23

3

22

20D10/21D0

20D19/21D9

C20 [ROW]

G23/[REFRESH ROW]

24 [PWR DWN]

C21[COLUMN]

G24

23C22

23,21D

24,25 EN

G25

A

0

1 048 575

RAM 1024K

× 4

&

A9

5

1

2

24

25

A,Z26

A,22D

26

DQ1

DQ2

DQ3

DQ4

† This symbol is in accordance with ANSI / IEEE Std 91-1984 and IEC Publication 617-12.

Pin numbers shown are for the DJ package.

functional block diagram

A0

A1

A9

16

Timing and Control

Column-

Address

Buffers

Row-

Address

Buffers

I/O

Buffers

1 of 16

Selection

Data-

In

Reg.

Data-

Out

Reg.

Column Decode

Sense Amplifiers

R

o

w

D

e

c

o

d

e

16

128K Array

128K Array

128K Array

128K Array

128K Array

128K Array

RAS

CAS

W

DQ1 – DQ4

4

4

OE

2

8

10

10

16

16

2