Details, datasheet, quote on part number: AK632256W
Description256K X 32, 64 Pin Sim Module, Available With Solder or Gold Leads
CompanyAccutek Microcircuit Corporation
DatasheetDownload AK632256W datasheet


Features, Applications

The Accutek AK632256 SRAM Module consists of eight fast high performance SRAMs mounted on a low profile, 64 pin SIM or ZIP Board. The module utilizes four 28 pin x 4 SRAMs in SOJ packages and four decoupling capacitors mounted on each side of a printed circuit board. The SRAMs used have common I/O functions and single output enable functions. Also, four separate chip select (CE) connections are used to independently enable the four bytes. The modules can be supplied in a variety of access time values from 12 nSEC to 45 nSEC in CMOS or BiCMOS technology. The Accutek module is designed to have a maximum seated height of 0.680 inch SIM or 0.540 inch ZIP to provide for the lowest height off the board. By offset-mounting the back surface SRAMs on the SIM version, the module can be mounted in either angled or straight-up SIM sockets. Each conforms to JEDEC standard sizes and pin-out configurations. Using two pins for module memory density identification, PD0 and PD1, minimizes interchangeability and design considerations when changing from one module size to another in customer applications.


x 32 bit organization JEDEC Standardized 64 pin SIM or ZIP format Common I/O, single OE functions with four separate chip selects (CE) Low height, 0.680 inch SIM or 0.540 inch ZIP maximum Upward compatible with 32 (AK532512) and 1 Meg 32 (AK6321024)

Downward compatible with 32 (AK63264) and 32 (AK632128) Presence Detect PD0 and PD1 for identifying module density Fast access times range from 12 nSEC BiCMOS to 45 nSEC CMOS TTL-compatible inputs and outputs Single +5 Volt (10%) power supply Operating temperature range in free air, to 700C

Timing diagrams and basic electrical characteristics are those of the standard x 4 SRAMs used to construct these modules. Accutek's module design allows the flexibility of selecting industry-compatible x 4 SRAMs from several semiconductor manufacturers.

- PD1 Vcc Vss WE Address Inputs Chip Enable Data In/Data Out Output Enable Presence Detect 5v Supply Ground Write Enable

Leadless SIM: AK632256W Leaded SIP: AK632256G Leaded ZIP: AK632256Z

Product AK = Accutek Memory 2 Type 4 = Dynamic RAM 5 = CMOS Dynamic RAM 6 = Static RAM 3 Organization/Word Width 9 4 Size/Bits Depth = 4 MEG = 8 MEG = 1 MEG = 16 MEG 5 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) 6 Special Designation P = Page Mode N = Nibble Mode K = Static Column Mode W = Write Per Bit Mode V = Video Ram 7 Separator - = Commercial M = Military Equivalent Screened I = Industrial Temperature Tested X = Burned In 8 Speed (first two significant digits) DRAMS SRAMS 35 nS The numbers and coding on this page do not include all variations available but are shown as examples of the most widely used variations. Contact Accutek if other information is required.

Module also available using 300 mil SRAMs Height of SIM Version = 0.600" Height of ZIP Version = 0.500"

32, 12 nSEC SRAM Module, SIM Configuration 32, 15 nSEC SRAM Module, ZIP Configuration 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 E-mail: Internet:

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. Preliminary data sheets contain minimum and maximum limits based upon design objectives, which are subject to change upon full characterization over the specific operating conditions.


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