Accutek Microcircuit Corporation AK68512D 524,288 x 8 Bit CMOS Static Random Access Memory DESCRIPTION The Accutek AK68512D high density memory module is a static random access memory organized in 512K x 8 bit words. The assembly consists of two medium speed 128K x 8 SRAMs in thin TSOP packages and a CMOS decoder logic IC mounted on the top side and two medium speed 128K x 8 SRAMs in thin TSOP packages mounted on the bottom surfaces of a printed circuit board. The module is supplied in a 600 mil wide,32 pin DIP (Dual In-Line Package) configuration. This pinout is completely compatible with forthcoming industry standard monolithic designs. These modules are intended for use in applications where limited board space dictates compact module designs. p To w Vie 1 tt Bo om w Vie 1 The operation of the AK68512D is identical to standard monolithic 8 bit word wide SRAMs. The AK68512D offers the features of low power and medium speed by using CMOS devices and makes high density mounting possible with no surface mount technology. FEATURES · 524,288 x 8 bit organization ELECTRICAL SPECIFICATIONS · Fast access time: 85 - 120 nSEC · Completely static RAM, no clock or timing strobe required · Inputs and outputs TTL compatible · Conventional 600 mil wide SIP package with industry compatible pinout Timing diagrams and basic electrical characteristics are those of the standard 128K x 8 SRAMs used to construct these modules. Accutek’s module design allows the flexibility of selecting industry-compatible 128K x 8 SRAMs from any of a number of semiconductor manufacturers. · Single 5 volt power supply - AK68512D · Single 3.3 volt power supply - AK68512D/3.3 · Operating free air temperature 00 to 700C PIN NOMENCLATURE Data In/Data Out A0 - A18 Adress Inputs CE Chip Enable WE Write Enable Vcc 5v Supply Vss Ground OE Output Enable 1 DQ1 - DQ8 PIN ASSIGNMENT TIMING OPTIONS 70 nSEC Access Time 85 nSEC Access Time 100 nSEC Access Time 120 nSEC Access Time A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ1 DQ2 DQ3 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Top View 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC A15 A17 WE A13 A8 A9 A11 OE A10 CE DQ8 DQ7 DQ6 DQ5 DQ4 MECHANICAL DIMENSIONS ORDERING INFORMATION PART NUMBER CODING INTERPRETATION Position 1 3 4 5 5 6 Inches 7 8 2.100 +/- .010 .170 MAX EXAMPLES: .600 +/- .006 The numbers and coding on this page do not include all variations available but are show as examples of the most widely used variations. Contact Accutek if other information is required. .012 .008 Product AK = Accutek Memory Type 4 = Dynamic RAM 5 = CMOS Dynamic RAM 6 = Static RAM Organization/Word Width 1 = by 1 16 = by 16 4 = by 4 32 = by 32 8 = by 8 36 = by 36 9 = by 9 Size/Bits Depth 64 = 64K 4096 = 4 MEG 256 = 256K 8192 = 8 MEG 1024 = 1 MEG 16384 = 16 MEG 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) Special Designation P = Page Mode N = Nibble Mode K = Static Column Mode W = Write Per Bit Mode V = Video Ram Separator - = Commercial 00C to +700C M = Military Equivalent Screened (-550C to +1250C) I = Industrial Temperature Tested (-450C to +850C) X = Burned In Speed (first two significant digits) DRAMS SRAMS 50 = 50 nS 8 = 8 nS 60 = 60 nS 10 = 10 nS 70 = 70 nS 12 = 12 nS 80 = 80 nS 15 = 15 nS .100 TYP 8 4 .018 +/- .002 7 3 1.500 +/- .015 6 2 .300 +/- .010 2 1 AK68512D-70 512K x 8, 70 nSEC SRAM Module, DIP 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 Email: [email protected] 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.