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| Accutek Microcircuit Corporation DESCRIPTION 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 256K 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. 1 AK632256W / AK632256Z 262,144 x 32 Bit CMOS/BiCMOS Static Random Access Memory Front View 64-Pin SIM 1 32 33 64 64-Pin ZIP 32 33 64 FEATURES * 262,144 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 512K x 32 (AK532512) and 1 Meg x 32 (AK6321024) * Downward compatible with 32K x 32 (AK63232), 64K x 32 (AK63264) and 128K x 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 power supply - AK632256W, AK632256Z * Single 3.3 volt power supply - AK632256W/3.3, AK632256Z/3.3 * Operating temperature range in free air, 00C to 700C ELECTRICAL SPECIFICATIONS Timing diagrams and basic electrical characteristics are those of the standard 256K x 4 SRAMs used to construct these modules. Accutek's module design allows the flexibility of selecting industry-compatible 256K x 4 SRAMs from several semiconductor manufacturers. PIN NOMENCLATURE A0 - A17 CE1 - CE4 DQ1 - DQ32 OE PD0 - PD1 Vcc Vss WE Address Inputs Chip Enable Data In/Data Out Output Enable Presence Detect Power Supply Ground Write Enable PIN ASSIGNMENT PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL FUNCTIONAL DIAGRAM CE4 CE3 A17 A16 OE Vss DQ25 DQ17 DQ26 DQ18 DQ27 DQ19 DQ28 DQ20 A3 A10 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 A4 A11 A5 A12 Vcc A13 A6 DQ21 DQ29 DQ22 DQ30 DQ23 DQ31 DQ24 DQ32 Vss 1 2 3 4 5 6 7 8 9 10 11 Vss PD0 PD1 DQ1 DQ9 DQ2 DQ10 DQ3 DQ11 DQ4 DQ12 Vcc A0 A7 A1 A8 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 A2 A9 DQ13 DQ5 DQ14 DQ6 DQ15 DQ7 DQ16 DQ8 Vss WE A15 A14 CE2 CE1 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 MODULE OPTIONS Leadless SIM: AK632256W Leaded SIP: AK632256G Leaded ZIP: AK632256Z 12 13 14 15 16 PD0 = Vss PD1 = Vss ORDERING INFORMATION PART NUMBER CODING INTERPRETATION Position 1 1 2 3 4 5 6 7 8 MECHANICAL DIMENSIONS Inches Top View ZIP Product AK = Accutek Memory 2 Type 4 = Dynamic RAM 5 = CMOS Dynamic RAM 6 = Static RAM 3 Organization/Word Width 1 = by 1 16 = by 16 4 = by 4 32 = by 32 8 = by 8 36 = by 36 9 = by 9 4 Size/Bits Depth 64 = 64K 4096 = 4 MEG 256 = 256K 8192 = 8 MEG 1024 = 1 MEG 16384 = 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 00C to +700C M = Military Equivalent Screened (-550C to +1250C) I = Industrial Temperature Tested (-450C to +850C) X = Burned In 8 Speed (first two significant digits) DRAMS SRAMS 60 = 60 nS 12 = 12 nS 70 = 70 nS 20 = 20 nS 80 = 80 nS 25 = 25 nS 10 = 100 nS 35 = 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" 1 2 3 4 5 6 59 60 61 62 64 63 0.680 MAX .100 x .100 ANGLE NOTCH 0.125 0.155 0.540 MAX 1 .425 .375 1 C L C L 0.125 0.135 CC LL 0.135 0.165 CC LL 0.050 TYP 0.050 TYP 3.590 3.610 64 3.855 3.845 0.100 TYP EXAMPLES: AK632256W-12 256K x 32, 12 nSEC SRAM Module, SIM Configuration AK632256Z-15 256K x 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: sales@accutekmicro.com Internet: www.accutekmicro.com 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. CC LL 0.350 MAX 0.350 MAX |
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