september 2006 advance information copyright ? alliance memory. all rights reserved. AS7C1025C 5v 128k x 8 cmos sram (center power and ground) 12/5/06, v. 1.0 alliance memory p. 1 of 9 ? features ? industrial (-40 o to 85 o c) temperature. ? organization: 131,072 x 8 bits ?high speed - 12 ns address access time - 6 ns output enable access time ? low power consumption via chip deselect ? easy memory expansion with ce , oe inputs ? center power and ground ? ttl/lvttl-compatibl e, three-state i/o ? jedec-standard package - 32-pin, 400 mil soj ? esd protection 2000 volts logic block diagram 131,072 x 8 array (1,048,576) sense amp input buffer a10 a11 a12 a13 a14 a15 a16 i/o0 i/o7 oe ce we address decoder address decoder control circuit a9 a0 a1 a2 a3 a4 a5 a6 a7 v cc gnd a8 pin arrangement 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 a16 a15 a14 a13 oe i/o7 i/o6 gnd v cc i/o5 i/o4 a12 a11 a10 a9 a8 a0 a1 a2 a3 ce i/o0 i/o1 v cc gnd i/o2 i/o3 we a4 a5 a6 a7 AS7C1025C 32-pin soj (400 mil)
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 2 of 9 ? functional description the AS7C1025C is a 5v high-performan ce cmos 1,048,576-bit sta tic random access memory (sram) devices organized as 131,072 x 8 bits. they are designed fo r memory applications where fast data acces s, low power, and si mple interfacing are desired. equal address access and cycle times (t aa , t rc , t wc ) of 12 ns with output enable access times (t oe ) of 6 ns are ideal for high- performance applications. th e chip enable input ce permits easy memory and expansion with multiple-bank memory systems. when ce is high, the device enters standby mode. if inputs are still toggling, the device will consume i sb power. if the bus is static, then full standb y power is reached (i sb1 ). a write cycle is accomplished by asserting wr ite enable ( we ) and chip enable ( ce ). data on the input pins i/o0 through i/o7 is written on the rising edge of we (write cycle 1) or ce (write cycle 2). to avoid bus contention, external devices should drive i/o pins only after outputs have been disabled with output enable ( oe ) or write enable ( we ). a read cycle is accomplished by asserting output enable ( oe ) and chip enable ( ce ), with write enable ( we ) high. the chips drive i/o pins with the data word referenced by the input address. when either chip enable or ou tput enable is inactive or writ e enable is active, output driver s stay in high-impedance mode. all chip inputs and outputs are ttl-compatible, and operation is from a single 5 v supply. the AS7C1025C is packaged in common industry stan dard packages. note: 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 these or any other conditions outsid e those indicated in the operational sections of this specificat ion is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. key: x = don?t care, l = low, h = high. absolute maximum ratings parameter symbol min max unit voltage on v cc relative to gnd v t1 ?0.50 +7.0 v voltage on any pin relative to gnd v t2 ?0.50 v cc + 0.5 v power dissipation p d ?1.25w storage temperature (plastic) t stg ?55 +125 o c ambient temperature with v cc applied t bias ?55 +125 o c dc current into outputs (low) i out ?50ma truth table ce we oe data mode h x x high z standby (i sb , i sb1 ) l h h high z output disable (i cc ) lhl d out read (i cc ) llx d in write (i cc )
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 3 of 9 ? notes: v il min = -1.0v for pulse width less than 5ns, once per cycle. v ih max = v cc +2.0v for pulse width less than 5ns, once per cycle. recommended operating conditions parameter symbol min nominal max unit supply voltage v cc 4.5 5.0 5.5 v input voltage v ih 2.2 ? v cc + 0.5 v v il ?0.5 ? 0.8 v ambient operating temperature (industrial) t a ?40 ? 85 o c dc operating characteristics (over the operating range) 1 parameter symbol test conditions AS7C1025C-12 unit min max input leakage current | i li | v cc = max, v in = gnd to v cc ?5 a output leakage current | i lo | v cc = max, ce = v ih , v out = gnd to v cc ?5 a operating power supply current i cc v cc = max ce v il , f = f max, i out = 0 ma ? 160 ma standby power supply current 1 i sb v cc = max ce v ih , f = f max ?40ma i sb1 v cc = max ce v cc ?0.2 v, v in 0.2 v or v in v cc ?0.2 v, f = 0 10 ma output voltage v ol i ol = 8 ma, v cc = min ? 0.4 v v oh i oh = ?4 ma, v cc = min 2.4 ? v capacitance ( f = 1 mhz, t a = 25 o c, v cc = nominal ) 2 parameter symbol signals test conditions max unit input capacitance c in a, ce , we , oe v in = 3dv 8 pf i/o capacitance c i/o i/o v in = v out = 3dv 8 pf note: this parameter is guaranteed by device characterization, but is not production tested.
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 4 of 9 ? key to switching waveforms read waveform 1 (address controlled) 3,6,7,9 read waveform 2 (ce and oe controlled) 3,6,8,9 read cycle (over the operating range) 3,9 parameter symbol AS7C1025C-12 unit notes min max read cycle time t rc 12 ? ns address access time t aa ?12ns3 chip enable ( ce ) access time t ace ?12ns3 output enable ( oe ) access time t oe ?6ns output hold from address change t oh 4?ns5 ce low t o output in low z t clz 3 ? ns 4, 5 ce low to output in high z t chz 0 6 ns 4, 5 oe low to output in low z t olz 0 ? ns 4, 5 oe high to output in high z t ohz 0 5 ns 4, 5 power up time t pu 0 ? ns 4, 5 power down time t pd ?12ns4, 5 undefined/don?t care falling input rising input a ddress d out data valid t oh t aa t rc current supply oe d out t oe t olz t ace t chz t clz t pu t pd i cc i sb 50% 50% data valid t rc1 ce t ohz
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 5 of 9 ? write waveform 1 (we controlled) 10,11 write cycle (over the operating range) 11 parameter symbol AS7C1025C-12 unit notes min max write cycle time t wc 12 ? ns chip enable ( ce ) to write end t cw 8?ns address setup to write end t aw 8?ns address setup time t as 0?ns write pulse width t wp 8?ns write recovery time t wr 0?ns address hold from end of write t ah 0?ns data valid to write end t dw 6?ns data hold time t dh 0 ? ns 4, 5 write enable to output in high z t wz ? 5 ns 4, 5 output active from write end t ow 3 ? ns 4, 5 t aw t ah t wc address we d out t dh t ow t dw t wz t wp t as data valid d in t wr
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 6 of 9 ? write waveform 2 (ce controlled) 10,11 ac test conditions notes: 1 during v cc power-up, a pull-up resistor to v cc on ce is required to meet i sb specification. 2 this parameter is sampled, but not 100% tested. 3 for test conditions, see ac test conditions , figures a and b. 4t clz and t chz are specified with cl = 5 pf, as in figure b. transition is measured 200 mv from steady-state voltage. 5 this parameter is guaranteed, but not 100% tested. 6 we is high for read cycle. 7 ce and oe are low for read cycle. 8 address is valid prior to or coincident with ce transition low. 9 all read cycle timings are referenced from the last valid address to the first transitioning address. 10 n/a 11 all write cycle timings are referenced from the last valid address to the first transitioning address. 12 n/a. 13 c = 30 pf, except all high z and low z parameters where c = 5 pf. t aw address ce we d out t cw t wp t dw t dh t ah t wz t wc t as data valid d in t wr ? output load: see figure b. ? input pulse level: gnd to 30 v. see figure a. ? input rise and fall times: 3 ns. see figure a. ? input and output timing reference levels: 1.5 v. 168 thevenin equivalent: d out +1.728 v 255 c 13 480 d out gnd +5 v figure b: 5 v output load 10% 90% 10% 90% gnd +3.0v figure a: input pulse 3 ns
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 7 of 9 ? package dimensions e d e1 pin 1 b b a1 a2 c e seating plane e2 a 32-pin soj 400 mil symbol 32-pin soj 400 mil min max a 0.132 0.146 a1 0.025 - a2 0.105 0.115 b 0.026 0.032 b 0.015 0.020 c 0.007 0.013 d 0.820 0.830 e 0.354 0.378 e1 0.395 0.405 e2 0.435 0.445 e 0.050 bsc note: this part is compatible with both pin numbering conventions used by various manufacturers.
AS7C1025C 12/5/06, v. 1.0 alliance memory p. 8 of 9 ? ordering codes package volt/temp 12 ns plastic soj, 400 mil 5v industrial AS7C1025C-12jin part numbering system as7c 1025c ?xx x x x sram prefix device number access time package: j = soj 400 mil temperature range i = industrial, -40 c to 85 c n = lead free part
alliance memory, inc. 1116 south amphlett san mateo, ca 94402 tel: 650-525-3737 fax: 650-525-0449 www.alliancememory.com copyright ? alliance memory all rights reserved part number: AS7C1025C document version: v. 1.0 ? copyright 2003 alliance memory, inc. all rights reserved. our three-point logo, our name and intelliwatt are trademarks or re gistered 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. alliance assumes 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 chang e or correct this data at any time, without notice. if the product described herein is under development, significant changes to these specifications are pos sible. the information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intende d to operate as, or provide, any guarantee or warrantee to any user or customer. alliance do es not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warra nties related to the sale and/or use of alliance products i ncluding liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, e xcept as express agreed to in alliance's terms and conditions of sale (which are available from alliance). all sales of alliance products are made exclusivel y according to alliance's terms and conditions of sale. the purchase of products from allia nce does not convey a license under any patent rights, copyrig hts; mask works rights, trademarks, or any other intellectual property rights of allianc e or third parties. alliance do es not authorize its products fo r use as critical components in life-supporting systems where a malfunction or failure may reasonabl y 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 inde mnify alliance against all claims arising from such use. AS7C1025C ? ?
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