AK532256WZ-80中文资料

The Accutek AK532256W high density memory module is a CMOS dynamic RAM organized in 256K x 32bit words.The module con-sists of eight standard 256K x 4DRAMs in plastic SOJ packages.The assembly has eight drams mounted on the front side of a printed circuit board in a 72pad leadless SIM configuration.The operation of the AK532256W is identical to eight 256K x 4DRAMs.There are four CAS lines and two RAS lines.Independent byte control is accomplished by four CAS lines.Each seperate CAS line controls two 256K x 4Drams to form an 8bit byte.The bank of 32bits is controlled by the two lines.A sixteen bit data path can be produced by connecting DQ 1to DQ 17,DQ 2to DQ 18and alter-nately strobing RAS 0with RAS 2.

FEATURES

·262,144x 32bit organization ·72pin Single In-Line Module

·Multiple CAS and RAS lines allow x16or x32bit widths ·CAS -before-RAS Refresh,RAS -only Refresh or Hidden refresh ·Operating free air temperature 0o C to 70o C ·Single 5Volt Power Supply ·512Refresh Cycles,8mSEC ·Power

2.00Watt Max Active (60nS)1.78Watt Max Active (70nS)1.562Watt Max Active (80nS)44mW Max Standby

versions ·Available in leadless SIM or leaded Zip versions

·Upward compatible with AK532512,AK5321024,AK5322048,AK5324096and AK5328192

ADDITIONAL OPTIONS AVAILABLE

·512K x 32version,AK532512·1Meg x 32version,AK5321024·2Meg x 32version,AK5322048·4Meg x 32version,AK5324096·8Meg x 32version,AK5328192

AK532256W

262,144Word by 32Bit CMOS Dynamic Random Access Memory

FUNCTIONAL DIAGRAM

ACCUTEK MICROCIRCUIT CORPORATION BUSINESS CENTER at NEWBURYPORT

2NEW PASTURE ROAD,SUITE1 NEWBURYPORT,MA01950-4054

PHONE:978-465-6200FAX:978-462-3396 Email:sales@https://www.360docs.net/doc/809902417.html,

Internet:https://www.360docs.net/doc/809902417.html, Accutek reserves the right to make changes in specifications at any time and without notice.Accutek does not assume any responsibility for the use of any circuitry described;no circuit patent licenses are implied.Pre-liminary data sheets contain minimum and maximum limits based upon design objectives,which are subject to change upon full characterization over the specific operating conditions.