AK632256W-72 262,144 CMOS/BiCMOS Format Static Random Access Memory

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AK632256W-72 262,144 CMOS/BiCMOS Format Static Random Access Memory

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AK632256W-72 262,144 CMOS/BiCMOS Format Static Random Access Memory
Accutek AK632256W-72 SRAM Module consists fast high performance SRAMs mounted profile, Board. module utilizes four 256K SRAMs packages four decoupling capacitors mounted each side printed circuit board. SRAMs used have common functions single output enable functions. Also, four separate chip select (CE) connections used independently enable four bytes. modules supplied variety access time values from nSEC nSEC CMOS BiCMOS technology. Accutek module designed have maximum seated height 0.680 inch provide lowest height board. offset-mounting back surface SRAMs module mounted either angled straight-up sockets. module conforms JEDEC standard sizes pin-out configurations. Using four pins module memory density identification, PD3, minimizes interchangeability design considerations when changing from module size another customer applications.
Front View 72-Pin
FEATURES
262,144 organization JEDEC Standardized pinout Common I/O, single functions with four separate chip selects (CE) height, 0.680 inch maximum Upward compatible with 512K (AK632512) (AK6321024)
Downward compatible with (AK63232), (AK63264) 128K AK632128 Presence Detect identifying module density Fast access times range from nSEC BiCMOS nSEC CMOS TTL-compatible inputs outputs Single Volt (±10%) power supply Operating temperature range free air, 700C
ELECTRICAL SPECIFICATIONS
Timing diagrams basic electrical characteristics those standard 256K SRAMs used construct these modules. Accutek's module design allows flexibility selecting industry-compatible 256K SRAMs from several semiconductor manufacturers.
NOMENCLATURE
DQ32 Address Inputs Chip Enable Data In/Data Output Enable Presence Detect Supply Ground Write Enable Connect
ASSIGNMENT
SYMBOL SYMBOL SYMBOL SYMBOL
FUNCTIONAL DIAGRAM
DQ25 DQ17 DQ26 DQ18 DQ27 DQ19 DQ28 DQ20 DQ21 DQ29 DQ22 DQ38 DQ23 DQ31 DQ24 DQ32 A18/NC A19/NC
PD2/NC PD3/NC DQ10 DQ11 DQ12
DQ13 DQ14 DQ15 DQ16
MODULE OPTIONS
Leadless SIM: AK632256W-72
Open Open
ORDERING INFORMATION
Position
MECHANICAL DIMENSIONS
Inches
PART NUMBER CODING INTERPRETATION
0.680 0.680 0.670
Product Accutek Memory Type Dynamic CMOS Dynamic Static Organization/Word Width Size/Bits Depth 4096 256K 8192 1024 16384 Package Type Single In-Line Package (SIP) Single In-Line Module (SIM) Dual In-Line Package (DIP) .050 inch Pitch Edge Connect Zig-Zag In-Line Package (ZIP) Special Designation Page Mode Nibble Mode Static Column Mode Write Mode Video Separator Commercial +700C Military Equivalent Screened (-550C +1250C) Industrial Temperature Tested (-450C +850C) Burned Speed (first significant digits) DRAMS SRAMS numbers coding this page include variations available shown examples most widely used variations. Contact Accutek other information required.
0.400 0.240 0.260
0.080 0.070 0.475 0.425
0.050 3.995 3.975 4.245 4.255 0.130 0.120
EXAMPLES:
AK632256W72-12 256K nSEC SRAM Module, Configuration ACCUTEK MICROCIRCUIT CORPORATION BUSINESS CENTER NEWBURYPORT PASTURE ROAD, SUITE NEWBURYPORT, 01950-4054 PHONE: 978-465-6200 FAX: 978-462-3396 Email: accutek@seacoast.com Internet: www.accutekmicro.com
Accutek Reserves right make changes specifications time without notice. Accutek does assume responsibility circuitry described; circuit patent licenses implied. Preliminary data sheets contain minimum maximum limits based upon design objectives, which subject change upon full characterization over specific operating conditions.
0.350

AK632256W-72 262,144 CMOS/BiCMOS Format Static Random Access Memory

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