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? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 1 of ? 10 f eatures ? ? 8192 x 8 bit static cmos ram ? 70 ns access times ? common data inputs and outputs ? three-state outputs ? typ. operating supply current o 70 ns: 10 ma ? standby current: o < 2 a at t a 70 c ? data retention current at 2 v: o < 1 a at t a 70 c ? ttl/cmos-compatible ? automatic reduction of power dissipation in long read or write cycles ? power supply voltage 5 v ? operating temperature ranges: o 0 to 70 c o -40 to 85 c ? esd protection > 2000 v (mil std 883c m3015.7) ? latch-up immunity > 100 ma ? packages: pdip28 (600 mil) sop28 (330 mil) d escription ? the as6c6264a is a static ram manufactured using a cmos process technology with the following operating modes: - read - standby - write - data retention the memory array is based on a 6- transistor cell. the circuit is activated by the rising edge of e2 (at e1 = l), or the falling edge of e1 (at e2 = h). the address and control inputs open simultaneously. according to the information of w and g, the data inputs, or outputs, are active. in a read cycle, the data outputs are activated by the falling edge of g, afterwards the data word read will be available at the outputs dq0 - dq7. after the address change, the data outputs go high-z until the new read information is available. the data outputs have no preferred state. if the memory is driven by cmos levels in the active state, and if there is no change of the address, data input and control signals w or g, the operating current (at io = 0 ma) drops to the value of the operating current in the standby mode. the read cycle is finished by the falling edge of e2 or w, or by the rising edge of e1, respectively. data retention is guaranteed down to 2 v. with the exception of e2, all inputs consist of nor gates, so that no pull-up/pull-down resistors are required. this gate circuit allows to achieve low power standby requirements by activation with ttl- levels too. if the circuit is inactivated by e2 = l, the standby current p in ? c onfiguration ? p in ? d escription ?
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 2 of ? 10 b lock ? d iagram ? t ruth ? t able ?
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 3 of ? 10 c haracteristics ? all voltages are referenced to vss = 0 v (ground). all characteristics are valid in the power supply volt age range and in the operating te mperature range specified. dynamic measurements are based on a rise and fall time of 5 ns, measured between 10 % and 90 % of vi, as well as input levels of vil = 0 v and vih = 3 v. the timing refe rence level of all input and output signals is 1.5 v, with the exception of the tdis-times, in which cases transition is measured } 200 mv from steady-state voltage. a. stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only, and functional operation of the device at condition above those indicated in the operational sections of this specification is not im plied.exposure to absolute maximum rating conditions for extended periods may affect reliability b. maximum voltage is 7 v c. not more than 1 output should be shorted at the same ti me. duration of the short circuit should not exceed 30 s.
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 4 of ? 10
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 5 of ? 10
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 6 of ? 10 t est ? c onfiguration ? for ? f unctional ? c heck ?
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 7 of ? 10
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 8 of ? 10 the ? information ? describes ? the ? type ? of ? component ? and ? shall? not ? be? considered ? as ? assured ? characteristic. ? terms ? of ? delivery? and ? rights ? to ? change? design ? reserved. ?
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 9 of ? 10 ? o rdering ? i nformation ? alliance organization vcc range package operating temp speed ns as6c6264a-70scn 8k x 8 4.5 - 5.5v 28pin 330 mil sop commercial~ 0 c ? 70 c 70 as6c6264a-70sin 8k x 8 4.5 - 5.5v 28pin 330 mil sop industrial ~ -40 c - 85 c 70 as6c6264a-70pcn 8k x 8 4.5 - 5.5v 28pin 600 mil p-dip commercial~ 0 c ? 70 c 70 as6c6264a-70pin 8k x 8 4.5 - 5.5v 28pin 600 mil p-dip industrial ~ -40 c - 85 c 70 ? ? ? p art ? n umbering ? s ystem ? as6c 6264 a -70 x x n sram prefix device number: low power (64k) die rev access time package option: p=28pin 600mil pdip s=28pin 330mil sop temperature range: c = commercial (0 to 70 c) i = industrial (-40 to + 85 c) n = lead free rohs compliant part ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
? ? march? 2009 ? as6c6264a ? ? 8 k? x ? 8 ? bit ? l o w? p o wer ? c m os ? s ram march / 2009 ? alliance ? memory page? 10 of ? 10 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? alliance ? memory, ? inc ? 511? taylor ? way, ? san ? carlos, ? ca ? 94070, ? usa ? phone: ?650\ 610\ 6800? fax: ? 650\ 620\ 9211? www.alliancememory.com ? ? ? ? copyright ? 2009? alliance ? memory, ? inc. ? all ? rights ? reserved. ? our ? three \ point? logo, ? our ? name ? and ? intelliwatt ? are ? trademarks ? or ? registered ? trademarks ? of ? alliance. ? all ? other ? brand ? and? product ? names? may ? be ? the ? trademarks ? of ? their ? respective ? companies. ? alliance ? reserves ? the ? right ? to ? make ? changes ? to ? this ? document ? and? its ? products ? at ? any ? time ? without ? notice. ? alli ance ? assu mes? no ? responsibility ? for ? any ? errors ? that ? may ? appear ? in ? this ? document. ? the ? data ? contained ? herein ? represents ? alliance's ? best ? data ? and/or ? estimates ? at ? the ? time ? of ? issuance. ? alliance ? reserves ? the ? right ? to ? change ? or ? correct? this ? data ? at ? anytime, ? without ? notice. ? if? the ? product ? described ? herein ? is ? under ? deve lopment, ? significant ? changes ? to ? these? specifications ? are ? possible. ? the ? information ? in ? this ? product?data ? sheet ? is ? intended ? to ? be ? general ? descriptive ? information ? for ? potential ? customers ? and? users, ? and? is ? not ? intended ? to ? operate ? as, ? or ? provide ? any ? guarantee ? or ? warrantee ? to ? any ? user ? or ? customer. ? alliance ? does?not ? assume ? any ? re sponsibility ? or ? liability ? arising ? out ? of ? the ? application ? or ? use ? of ? any ?product?described ? herein, ? and ? disclaims ? any ? express ? or ? implied ? warranties ? related ? to ? the ? sale ? and/or? use ? of ? alliance ? products ? including ? liability ? or ? warranties ? related ? to ? fitness ? for ? a ? particular ? purpose, ? merchantability, ? or ? infringement ? of ? any ? intellectual ? property ? rights, ? exc ept ? as ? express ? agreed ? to ? in ? alliance's ? terms ? and ? conditions ? of ? sale ? (which ? are ? available ? from ? alliance). ? all ? sales ? of ? alliance ? products ? are ? made ? exclusively ? according ? to ? alliance's ? terms ? and ? conditions ? of ? sale. ? the ? purchase ? of ? products ? from ? alliance ? does?not ? convey ? a ? license ? under ? any ? patent ? rights, ? copyrig h ts; ? mask ? works ? rights, ? trademarks, ? or ? any ? other ? intellectual ? property ? rights ? of ? alliance ? or ? third ? parties.? alliance ? does?not ? authorize ? its ? products ? for ? use ? as ? critical? components ? in ? life \ supporting ? systems ?where ? a ? malfunction ? or ? failure ? may ? reasonably ? be ? expected ? to ? result ? in ? significant ? injury ? to ? the ? user, ? and? the ? inclusion ? of ? alliance ? products ? in ? such ? life \ supporting ? systems ? implies ? that ? the ? manufacturer ? assumes ? all ? risk ? of ? such ? use ? and? agrees ?to ? indemnify ? alliance ? against ? all ? claims ? arising ? from ? such ? use. ? copyright ? alliance memory all rights reserved ?

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