DESCRIPTION

The Accutek AK584096 high density memory module is a CMOS

dynamic RAM organized in 4 Meg x 8 bit words. The assembly con-

sists of two 4 Meg x 4 DRAMS, mounted on the front side of a printed

circuit board in 30 pad SIM (leadless) or 30 pin SIP (leaded) configu-

ration with JEDEC-standard pinouts.

Designed especially for

low-height applications such as VMEbus boards, this low profile

module is 0.550 inch high.

The operation is identical to eight 4 Meg x 1 DRAMs. The data in-

put/output is brought out separately for each bit, with common RAS ,

CAS and WE control. This common I/O feature dictates the use of

early-write cycles to prevent contention of Data In and Data Out.

Since the Write-Enable (WE) signal must always go low before CAS

in a write cycle, Read-Write and Read-Modify-Write operation is not

possible.

FEATURES

· 4,194,304 x 8 bit organization

· Low Profile 30 pad (SIM) Single In-Line Memory

· Low Profile 30 pin (SIP) Single In-Line package

· JEDEC standard pinout

· Common CAS and RAS control for eight common DQ Lines

· CAS-before-RAS refresh

· Refresh cycle 2048 cycles in 32 mSEC

· Power

0.095 Watt Max Active, 70 nSEC

1.060 Watt Max Active, 60 nSEC

11.0 mWatt Max Standy

· Operating free air temperature 0

· Downward compatible with AK581024 and AK58256

· Upward compatible with AK5816384

· Fast Page Mode and Static Column Mode versions available,

nibble mode is not possible

ACCUTEK

MICROCIRCUIT CORPORATION

AK584096BS / AK584096BG

4,194,304 Word by 8 Bit CMOS

Dynamic Random Access Memory

PIN NOMENCLATURE

Address Inputs

Row Address Strobe

CAS

Column Address Strobe

WE

Write Enable

OE

Output Enable

Data In/Data Out

Vcc

5v Supply

Vss

Ground

NC

No Connect

MODULE OPTIONS

Leadless SIM: AK584096BS

Leaded SIP: AK584096BG

PIN ASSIGNMENT

Pi

n#

Symbol

Pi

n#

Symbol

1

Vcc

16

DQ5

2

CAS

17

A8

3DQ1

18

A9

4A0

19

A10

5A1

20

DQ6

6

DQ2

21

WE

7

A2

22

Vss

8A3

23

DQ7

9

Vss

24

NC

10

DQ3

25

DQ8

11

A4

26

NC

12

A5

27

13

DQ4

28

NC

14

A6

29

NC

15

A7

30

Vcc

+

1

1

30

+

+

+

Front View

30-Pin SIM

30-Pin SIP

FUNCTIONAL DIAGRAM