Datasheet > AK59256ASV-80

AK59256ASV-80

更新时间： 2024-11-08 04:13:15

品牌	Logo	应用领域
ACCUTEK		动态存储器
页数	文件大小	规格书
2页	90K
描述
DRAM

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技术参数
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AK59256ASV-80 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

AK59256ASV-80 数据手册

Accutek

Microcircuit

Corporation

AK59256AS / AK59256AG

262,144 Word by 9 bit, CMOS

Dynamic Random Access Memory

DESCRIPTION

Front View

30-Pin SIM

The Accutek AK59256A high density memory modules is a random

access memory organized in 256K x 9 bit words. The assembly

consists of two 256K x 4 and one 256K x 1 DRAMs in surface mount

packages mounted to 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 den-

sity increase over standard DIP packaging.

30-Pin SIP

The operation of the AK59256A is identical to two 256K x 4 DRAMs

plus one 256K x 1 DRAM. For the lower eight bits data input is tied

to data output and brought out separately for each 256K 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.

· Power:

FEATURES

1.26 Watt Max Active (70 nSEC)

1.10 Watt Max Active (80 nSEC)

.935 Wat Max Active (100 nSEC)

22 mWatt Standby (Max)

· 262,144 x 9 bit organization

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

SIP (Single In-Line Package)

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

· JEDEC standard pinout

· Upward compatible with AK491024, AK591024, AK594096

and AK5916384

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

· Separate PCAS control for D₉and Q₉

· Functionally and Pin compatible with AK49256

· Available with access times of 60 nSEC to 100 nSEC

PIN NOMENCLATURE

PIN ASSIGNMENT

FUNCTIONAL DIAGRAM

PIN #

SYMBOL

Vcc

CAS

DQ1

PIN #

SYMBOL

DQ5

DQ₁- DQ₈

D₉

Data In / Data Out

A0 - A8

RAS

CAS

DQ1

DQ2

DQ3

DQ4

RAS

CAS

Data In

Q₉

Data Out

DQ1 +

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 - A8

RAS

CAS

DQ1

DQ2

DQ3

DQ4

Vss

DQ3

Vcc

DQ8

DQ5 +

DQ6

DQ7

DQ8

Vss

Ground

RAS

PCAS

No Connect

DQ4

A0 - A8

RAS

CAS

MODULE OPTIONS

Vcc

PCAS

Leadless SIM: AK59256AS

Leaded SIP: AK59256AG

中文翻译

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与AK59256ASV-80相关器件

型号	品牌	获取价格	描述	数据表
AK59256ASW-60	ACCUTEK	获取价格	DRAM
AK59256ASW-70	ACCUTEK	获取价格	DRAM
AK59256ASW-80	ACCUTEK	获取价格	DRAM
AK59256D	ACCUTEK	获取价格	262,144 X 8 Bit MOS Dynamic Random Access Memory
AK59256G	ACCUTEK	获取价格	262,144 X 8 Bit MOS Dynamic Random Access Memory
AK59256GK10	ACCUTEK	获取价格	DRAM
AK59256GK60	ACCUTEK	获取价格	DRAM
AK59256GKI10	ACCUTEK	获取价格	DRAM
AK59256GKI60	ACCUTEK	获取价格	DRAM
AK59256GKI70	ACCUTEK	获取价格	DRAM

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