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| DESCRIPTION Accutek Microcircuit Corporation AK681024G 1,048,579 x 8 Bit CMOS Static Random Access Memory The Accutek AK681024G is a high density SRAM memory module organized in 1 Meg X 8 bit words. The assembly consists of four medium speed 128K X 8 SRAMs in thin TSOP packages, plus a CMOS decoder logic IC and four decoupling capacitor chips, mounted on the front side and four medium speed 128K x 8 SRAMS in thin TSOP packages and four decoupling capacitor chips mounted on the back side of a low-profile printed circuit board. The module configuration is a 36 pin leaded SIP. The memory operates as a single asynchronous 1 Meg X 8 SRAM from a 5V supply, and has common I/O, chip enable, output enable and write enable functions. With the proper choice of SRAMs, it is available in three separate low-standby-power configurations, with access times of 55, 70, 85 or 100 nSEC. The combination of low power, low profile and high density packaging offered by the AK681024G makes it ideal for use in applications where board space and available power are limited and extremely low access times are not required. It is especially useful in VMEbus designs and in places where very close module-to-module spacing is dictated. 1 36 * Range of access times from 55 to 100 nSEC * Low, low-low and ultra-low standby power level versions available * Single 5 volt power supply - AK681024G * Single 3.3 volt power supply - AK681024G/3.3 * Operating free air temerature 00C to 700C (Industrial range version of -100C to 850C also available) * Completely static and asynchronous, no clock or timing strobe required * Low 9.0 Watt Max Active 120 Watt Max Standby Low Low 9.0 Watt Max Active 80 Watt Standby FEATURES * 1,048,576 x 8 bit organization * JEDEC Standard 36 pin SIP format * Common I/O, single OE, CE and WE functions * Low 0.550 inch maximum seated height and thin profile allow maximum board density PIN NOMENCLATURE DQ0 - DQ7 A0 - A19 CE WE OE Vcc Vss NC Data In/Data Out Address Inputs Chip Enable Write Enable Output Enable 5v Supply Ground No Connection PIN ASSIGNMENT PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL PIN # SYMBOL FUNCTIONAL DIAGRAM CE A15 A16 A12 A18 A6 DQ1 Vss A0 28 29 30 31 32 33 34 35 36 A7 A8 A9 DQ7 DQ4 DQ6 A17 Vcc OE 1 2 3 4 5 6 7 8 9 NC Vcc WE DQ2 DQ3 DQ0 A1 A2 A3 10 11 12 13 14 15 16 17 18 A4 Vss DQ5 A10 A11 A5 A13 A14 A19 19 20 21 22 23 24 25 26 27 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM 128K x 8 SRAM Leaded SIP: AK681024G DECODER A19 A18 A17 CE OE WE A0 - A16 DQ0 - DQ7 MODULE OPTIONS ORDERING INFORMATION PART NUMBER CODING INTERPRETATION Position 1 1 2 3 4 5 6 7 8 MECHANICAL DIMENSIONS Inches 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. 0.550" 1 3.500" 36 4.000" 0.150" EXPAMPLES: AK681024G-70LL 1 Meg x 8, 70 nSEC Low Low Power SRAM Module, SIP 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: 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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