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| Accutek Microcircuit Corporation DESCRIPTION The Accutek AK591024 high density memory modules is a random access memory organized in 1 Meg x 9 bit words. The assembly consists of two 1 Meg x 4 and one 1 Meg x 1 DRAMs in surface mount packages mounted on the front side of a printed circuit board. The module can be configured as a leadless 30 pad SIM or a leaded 30 pin SIP. This packaging approach provides a better than 6 to 1 density increase over standard DIP packaging. The operation of the AK591024 is identical to two 1 Meg x 4 plus one 1 Meg x 1 DRAMs. For the lower eight bits, the data input is tied to data output and brought out separately for each 1 Meg x 4 device, with common RAS, CAS and WE control. The OE pins are tied to Vss which dictates the use of early-write cycles to prevent contention of D and Q. Since the Write-Enable (WE) signal must always go low before CAS in a write cycle, Read-Write and Read-Modify-Write operation is not possible. For the ninth bit, the data input (D9) and data output (Q9) pins are brought out separately and controlled by a separate PCAS for that bit. Bit nine is generally used for parity. AK591024AS / AK591024AG 1,048,576 Word X 9 bit, CMOS Dynamic Random Access Memory Front View 30-Pin SIM + 1 + 30 30-Pin SIP + 1 + FEATURES * 1,048,576 x 9 bit organization * Optional 30 Pad SIM (Single In-Line Module) or 30 Pin leaded SIP (Single In-Line Package) * JEDEC standard pinout * Common CAS, RAS and WE control for the lower eight bits * 1024 refresh cycles/16ms * Separate PCAS control for D9 and Q9 * Power: 1.650 Watt Max Active (60 nS) 1.485 Watt Max Active (70 nS) 1.265 Watt Max Active (80 nS) 23.5 mWatt Standby (max) * Operating free air temperature: 0o to 70oC * Upward compatible with and AK594096 and AK5916384 * Downward compaitble with AK59256 * Functionally and Pin compatible with AK491024 PIN NOMENCLATURE DQ1 - DQ8 D9 Q9 A0 - A9 CAS, PCAS RAS WE Vcc Vss NC Data In / Data Out Data In Data Out Address Inputs Column Address Strobe Row Address Strobe Write Enable 5v Supply Ground No Connect PIN ASSIGNMENT PIN # SYMBOL PIN # SYMBOL FUNCTIONAL DIAGRAM DQ5 A8 A9 NC DQ6 WE Vss DQ7 NC DQ8 Q9 RAS PCAS D9 Vcc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Vcc CAS DQ1 A0 A1 DQ2 A2 A3 Vss DQ3 A4 A5 DQ4 A6 A7 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 A 0 - A9 + RAS + CAS + WE + DQ1 + DQ2 + DQ3 + DQ4 + 10 A0 - A9 * RAS * CAS * WE * DQ1 * DQ2 * DQ3 * DQ4 OE * DQ5 DQ6 DQ7 DQ8 + + + + A0 - A9 * RAS * CAS * WE * DQ1 * DQ2 * DQ3 * DQ4 OE * MODULE OPTIONS Leadless SIM: AK591024ASP Leaded SIP: AK591024AGP 15 PCAS + A0 - A9 * RAS * CAS * WE D9 + Q9 + *D Q* ORDERING INFORMATION PART NUMBER CODING INTERPRETATION Position 1 2 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 1 2 3 4 5 6 7 8 MECHANICAL DIMENSIONS Inches 3 0.505 0.495 4 0.260 0.240 0.085 0.075 0.325 0.275 0.100 TYP 0.505 0.495 5 + 1 + 1 0.100 T.P. 0.100 T.P. 6 3.510 3.490 3.110 3.090 0.024 0.016 7 Do Not Install Do Not Install 8 + + 0.053 0.047 30 0.200" MAX 0.100 TYP 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. EXAMPLES: AK591024AGP-60 1 Meg x 9, 60 nSEC, DRAM, SIP Configuration, 30 Pin AK591024ASP-70 1 Meg x 9, 70 nSEC, DRAM, SIM Configuration, 30 Pin 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: 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. |
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