AK588192S [ACCUTEK]

262,144 X 8 Bit MOS Dynamic Random Access Memory; 262144 ×8位CMOS动态随机存取存储器


型号：	AK588192S
厂家：	ACCUTEK MICROCIRCUIT CORPORATION
描述：	262,144 X 8 Bit MOS Dynamic Random Access Memory 262144 ×8位CMOS动态随机存取存储器存储
文件：	总2页 (文件大小：113K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Accutek

Microcircuit

Corporation

AK48256S / AK48256G

262,144 X 8 Bit MOS

Dynamic Random Access Memory

DESCRIPTION

Front View

30-Pin SIM

The Accutek AK48256 high density memory modules is a random

access memory organized in 256K x 8 bit words. The assembly

consists of eight standard 256K x 1 DRAMs in plastic leaded chip

carriers (PLCC) mounted on the front side of a printed circuit board.

The module can be configured as a leadless 30 pad SIM or a leaded

30 pin SIP. This packaging approach provides a 6 to 1 density in-

crease over standard DIP packaging.

30-Pin SIP

The operation of the AK48256 is identical to eight 256K x 1 DRAMs.

The data input is tied to the data output and brought out separately

for each device, with common RAS, CAS and WE control. This

common I/O feature dictates the use of early-write cycles to prevent

contention of D and Q. Since the Write-Enable (WE) signal must al-

ways go low before CAS in a write cycle, Read-Write and

Read-Modify-Write operation is not possible.

FEATURES

· 262,144 by 8 bit organization

· Optional 30 Pad leadless SIM (Single In-Line Module) or 30

Pin leaded SIP (Single In-Line Package)

· JEDEC standard pinout

· Each device has common D and Q lines with common RAS,

CAS and WE control

· 2.8 Watt active and 180 mW standby (max)

· Operating free air temperature 0⁰C to 70⁰C

· Upward compatible with AK481024, AK581024, AK584096 and

AK5816384

· Functionally and Pin compatible with AK58256A

PIN NOMENCLATURE

PIN ASSIGNMENT

FUNCTIONAL DIAGRAM

PIN #

SYMBOL

Vcc

CAS

DQ!

PIN #

SYMBOL

A₀- A₈

DQ₁- DQ₈

CAS

Address Inputs

DQ5

Data In / Data Out

Column Address Strobe

Row Address Strobe

Write Enable

RAS

DQ6

Vss

DQ7

DQ2

Vcc

5v Supply

Vss

Ground

Vss

DQ3

No Connect

DQ8

RAS

MODULE OPTIONS

DQ4

Leadless SIM: AK48256S

Leaded SIP: AK48256G

Vcc

ORDERING INFORMATION

MECHANICAL DIMENSIONS

PART NUMBER CODING INTERPRETATION

Inches

Position

Product

= Accutek Memory

Type

4 = Dynamic RAM

5 = CMOS Dynamic RAM

6 = Static RAM

Organization/Word Width

1 = by 1 16 = by 16

4 = by 4 32 = by 32

8 = by 8 36 = by 36

9 = by 9

Size/Bits Depth

64 = 64K

4096 = 4 MEG

8192 = 8 MEG

1024 = 1 MEG 16384 = 16 MEG

256 = 256K

Package Type

G = Single In-Line Package (SIP)

S = Single In-Line Module (SIM)

D = Dual In-Line Package (DIP)

W = .050 inch Pitch Edge Connect

Z = Zig-Zag In-Line Package (ZIP)

Special Designation

P = Page Mode

N = Nibble Mode

K = Static Column Mode

W = Write Per Bit Mode

V = Video Ram

Separator

= Commercial 0⁰C to +70⁰C

M = Military Equivalent Screened

(-55⁰C to +125⁰C)

= Industrial Temperature Tested

(-45⁰C to +85⁰C)

X = Burned In

0.100

TYP

Speed (first two significant digits)

SRAMS

DRAMS

50 nS

60 nS

70 nS

80 nS

8 nS

10 nS

12 nS

15 nS

The numbers and coding on this page do not include all variations

available but are show as examples of the most widely used variations.

Contact Accutek if other information is required.

EXAMPLES:

AK48256SP-10

256K x 8, 100 nSEC DRAM 30 pin SIM Configuration, Page Mode

AK48256GK-80

256K x 8, 80 nSEC DRAM 30 pin SIP Configuration, Static Column Mode

ACCUTEK MICROCIRCUIT CORPORATION

BUSINESS CENTER at NEWBURYPORT

2 NEW PASTURE ROAD, SUITE 1

NEWBURYPORT, MA 01950-4054

VOICE: 978-465-6200 FAX: 978-462-3396

Accutek reserves the right to make changes in specifications at any

time and without notice. Accutek does not assume any responsibil-

ity for the use of any circuitry described; no circuit patent licenses

are implied. Preliminary data sheets contain minimum and maxi-

mum limits based upon design objectives, which are subject to

change upon full characterization over the specific operating condi-

tions.

Email: sales@accutekmicro.com

Internet: www.accutekmicro.com

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