Datasheet > AK591024AGV-70

AK591024AGV-70

更新时间： 2024-02-29 04:26:51

品牌	Logo	应用领域
ACCUTEK		动态存储器
页数	文件大小	规格书
2页	93K
描述
DRAM

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AK591024AGV-70 技术参数

生命周期：	Contact Manufacturer	包装说明：	,
Reach Compliance Code：	compliant	风险等级：	5.75
Base Number Matches：	1

AK591024AGV-70 数据手册

Accutek

Microcircuit

Corporation

AK591024AS / AK591024AG

1,048,576 Word X 9 bit, CMOS

Dynamic Random Access Memory

DESCRIPTION

Front View

30-Pin SIM

The Accutek AK591024 high density memory modules is a random

access memory organized in 1 Meg x 9 bit words. The assembly

consists of two 1 Meg x 4 and one 1 Meg x 1 DRAMs in surface

mount packages 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 better than 6 to 1

density increase over standard DIP packaging.

30-Pin SIP

The operation of the AK591024 is identical to two 1 Meg x 4 plus one

1 Meg x 1 DRAMs. For the lower eight bits, the data input is tied to

data output and brought out separately for each 1 Meg x 4 device,

with common RAS, CAS and WE control. The OE pins are tied to

Vss which dictates the use of early-write cycles to prevent conten-

tion of D and Q. 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. For the ninth bit, the data input (D₉₎and

data output (Q₉) pins are brought out separately and controlled by a

separate PCAS for that bit. Bit nine is generally used for parity.

FEATURES

· Power:

· 1,048,576 x 9 bit organization

1.650 Watt Max Active (60 nS)

1.485 Watt Max Active (70 nS)

1.265 Watt Max Active (80 nS)

23.5 mWatt Standby (max)

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

SIP (Single In-Line Package)

· JEDEC standard pinout

· Operating free air temperature: 0^oto 70^oC

· Upward compatible with and AK594096 and AK5916384

· Downward compaitble with AK59256

· Common CAS, RAS and WE control for the lower eight bits

· 1024 refresh cycles/16ms

· Separate PCAS control for D₉and Q₉

· Functionally and Pin compatible with AK491024

PIN NOMENCLATURE

PIN ASSIGNMENT

FUNCTIONAL DIAGRAM

PIN #

SYMBOL

Vcc

CAS

DQ1

PIN #

SYMBOL

DQ5

DQ₁- DQ₈

D₉

Data In / Data Out

A₀- A₉

RAS

CAS

Data In

RAS

CAS

Q₉

Data Out

DQ1 +

DQ1

DQ2

DQ3

DQ4

DQ2

DQ3

DQ4

A₀- A₉

CAS, PCAS

RAS

Address Inputs

Column Address Strobe

Row Address Strobe

Write Enable

5v Supply

DQ6

DQ2

Vss

DQ7

A₀- A₉

RAS

CAS

DQ1

DQ2

DQ3

DQ4

Vss

DQ3

Vcc

DQ8

DQ5 +

DQ6

DQ7

DQ8

Vss

Ground

RAS

PCAS

No Connect

DQ4

A₀- A₉

RAS

CAS

MODULE OPTIONS

Vcc

PCAS

* WE

Leadless SIM: AK591024ASP

Leaded SIP: AK591024AGP

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