LC35256A SANYO | Alldatasheet

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[Ordering number : EN4916A| CMOS LSI LC35256A, AS, AM, AT-70/85/10 256K (32768 words x 8 bits) SRAM with OE and CE Control Pins Overview + 28-pin TSOP (8 x 13.4) plastic package: LC35256AT The LC35256A, AS, AM, and AT are 32768 words x _* Shared I/O pins, three-state outputs 8-bits asynchronous silicon gate CMOS SRAMs. These” No clock required (completely static circuit) products feature a 6-transistor full-CMOS memory cell, Package Dimensions low voltage operation, a low operating current, and an . ultra-low standby current. unit: mm The LC35256A series product control signal inputs 3012A-DIP28 include both an OE pin for high-speed access and a chip enable (CE) pin device selection; thus the LC35256A {LC36256A] series products allow easy memory expansion and are optimal for systems that require low power battery Peoooeroregon backup. The ultra low standby current allows capacitor backup to b tn be used. 1 The 3 volt operation means that the LC35256A series is GUD Coo Sooo optimal for use in portable battery-operated systems. 37.9 OOO AO ye Features ARTE + Supply voltage range: 2.7 to 5.5 V h 5 V operation: 5.0 V 10% O48 NR 28k 3 V operation: 2.7 to 3.6 V + Access times SANYO: DIP28 — 5 Voperation LC35256A, AS, AM, AT-70: 70 ns (max.) unit: mm LC35256A, AS, AM, AT-85: 85 ns (max.) 3133-DIP28S LC35256A, AS, AM, AT-10: 100 ns (max.) — 3 Voperation {LC35256AS] LC35256A, AS, AM, AT-70: 200 ns (max.) LC35256A, AS, AM, AT-85: 250 ns (max.) ne _— LC35256A, AS, AM, AT-10: 500 ns (max.) f a 5 V operation: 1.0 WA (Ta s 60°C), 5.0 "A (Ta s 85°C) iia | 4 3 V operation: 0.8 4A (Ta s 60°C), 4.0 pA (Ta < 85°C) ——_35. ca * Operating temperature range: —40 to +85°C i eI foo oot + Data retention supply voltage: 2.0 to 5.5 V * : STARA AAA * Input levels ° mal

5 V operation: TTL compatible 1 Th it 2

3 V operation: Voc - 0.2 V/0.2 V + 28-pin DIP (600 mil) plastic package: LC35256A Series . 28 pin DIP (300 mil) plastic package: LC35256AS SANYO: DIP28S Series + 28-pin SOP (450 mil) plastic package: LC35256AM Series SANYO Electric Co., Ltd. Semiconductor Business Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 52096HA (OT)/41495TH(OT) No. 4916-1/8

LC35256A, AS, AM, AT-70/85/10 BREAN ASLAM AT-7OVB5II0 unit: mm. unit: mm 3187-SOP28D 3221-TSOP28 [LC35256AM) {LC35256AT) ery s ARRARSARARARRK HORAAAAAAaAnAd WF <| 3 d Hil ¢ 18.0 aioe? F ‘ee | al | thio, | ca in salt ° SANYO: SOP28D 3 SANYO: TSOP26 (TYPE-1) Pin Assignments uf] [23] vce Ae] as zo pete ele [er] Fe toa] es ts eve of fF] s0 De ts jboies “s fs le4] “s rend x 2 13 = 103 mol Bea) ass cay: i eye of] [eo] ee Top view sewes 10 [ral [ia] 1708 vos fal fre} ae ° Block Diagram vee {ia 106 1709 [fa] [x6] 105 ono [ra] [15] 170% 45 e545 3s A g U 512x512 Pin Functions med syle rexsH — oxo mee] {* [ee [ot rain] par i fio; wi, |oamto | ma ea LI z—d> (anes No. 4916-2/8

LC35256A, AS, AM, AT-70/85/10 oo Truth Table [ec a rt J [Readeyte ate opt ce [witeye | Pata opt icc High inpedanco x: Horl Specifications Absolute Maximum Ratings [_avameter OT Symbon [Gonatons ating [unt] Ce Feulpinvorage [vy [dong vd |_| [wormvotage to | SSC tog v8 |] Operating porate [to oto ves |e _| Storage temperature [tig [sto 125 [ro Note; * A minimum value of ~3.0 V is allowable for pulse widths under 30 ns. Input/Output Capacitances at Ta = 25°C, f= 1 MHz [____ Parameter | symbot [Conatons min TY max (| Unt [WOpmeapectenee | Oyo |vigoeov SS SSSCSCSCS*dTSCSi 0 pul preapaclance a Nole: * These values are sampled values, and are not measured for all products.

5 V Operation

DC Recommended Operating Ranges at Ta = —40 to +85°C, Voc = 4.5 to 5.5V a Supply voltage Poo [as so sv out vonage a OEY a a Note: * A minimum value of -3.0V Is allowable for pulse widths under 30 ns. [Pare Symeet [Contos nee] ial alage cet [us [vusoves CS 0 a] Oupuiighlvelvetage | Von [lou=—toma |e Ouputfow evelvotage | Vou [ine20ma SSS operat Vee=¥) ig De rating: = ile min Goat? [rious | [i Cuitory, | Mi Lose. as.amates[ [a [as] lyo=0mA, L035256A,AS,AMAT-10[ | 25 | 30 wy rom ioe YS as | oo Tasers or Td Standby 0.2 V inputs CCS1 | Vin =0l0 Veg current [tasessc 50] Note: * Reference values when Vog = 5 V and Ta = 25°C. SSS No. 4916-3/8

LC35256A, AS, AM, AT-70/85/10 AC test conditions Input pulse voltage level: 0.6 102.4 V Input rise and fall times: Sns Input and output timing level: 15V Output load LC35256A, AS, AM, AT-70: 30 pF + 1 TTL gate (including the jig capacitance) LC35256A, AS, AM, AT-85/10: 100 pF + 1 TTL gate (including the jig capacitance) Read Cycle [ne eee | | a [Readeyeietime tne Pas 00s [Address access time Tt Pas 00s [CE access time Etc P00 os] [OE accessime Tt Ps os [ouwurnoistime Tt ft oto as [CE ouputenabiotme Teor Po Po | [OEouputenadioime Toe Ps Ps Ps [CE ourpurdisabietme | cop PP as | [supa dsabewme | too | | as | es Write Cycle pee [me ge Ee | | [min [max [rin Tmax ina [wie yietime we 0s 00s | [Address sewptime Tags Ps | [wie pulse width tw sss co | [ee sewptime tow to as os [Wie recovery ime tw as [CE wite recovery time Tw | [Datasewp ime ts sa os [Datanoid ime tow Ps [CE darahoid ime Tt PO | [WE ouputenabiotime | woe fs fs ss | [WE ouputcisabioime Two [mo 00s

3 V Operation

DC Recommended Operating Ranges at Ta = -40 to +85°C, Vcc = 2.7 to 3.6 V a |Suepiyvotage | oo Pa [0 Pv en Note: * A minimum value of -2.0 V is allowable for pulse widths under 30 ns. No. 4916-4/8

LC35256A, AS, AM, AT-70/85/10 [Parameter [Synalar in [emo] [Imputteakage curent | ts [Ve OtVeo to eto [Ouputleatage curent | ho |Ver= Vino’ Vor VnsorVne=Van Vig =O Veg | -10[ [1a | wa_| [Ourputhigh evel woage | Von [tous-0SmA Mego f TT [Outputtow evel vortage | Von Pine soma oe [ucesassa.as.amati7o[ [7 [0 | VoE=Vin, curent — J0SVinpus | com | INS [rcasessa.as.am.aro| | a [5 _| yee imgen as as Ven_o2w Vere Veq_02V EL OX Standt - 2Vog-0.2V, corer” [oSVvinpus | ees WWerro Sco [exec oe) a [rasese TCT Note: Reference values when Vog = 3 Vand Ta = 25°C. AC Electrica! Characteristics at Ta = -40 to +85°C, Voc = 2.7 to 3.6 V AC test conditions Input pulse voltage level: 0.2 V to Voc - 2.0 V Input rise and fall times: 10 ns Input and output timing level: 15V Output load LC35256A, AS, AM, AT-70: 30 pF (including the jig capacitance) LC35256A, AS, AM, AT-85/10: 100 pF (including the jig capacitance) Read Cycle Paramerer eS a a SO [min mae Pin max in ax [Readeyclotime te fo aso sos [Acdressaccessine i wf me | [CE accesso Tce P00 5 500s [OE accesstime tw Po tc 50s [Ouputhoidtime te Pe tn [CE ouputenarietme coe J ts [OE ouputenabietme toe ft Pt to as [CEoupurdisadioime | coo PT coos [OEouputcisabiotime tooo Poe t00 Write Cycle [min max [in Tmax in max | [Write cycie time te 00 aso 0 te | [Address seuptime | ts fo PP | Weie poise wien te Peo os [cEsewptme tw toto sos [write recovery time twa PP [CE write recovery ime twas PO ts [Datasewptme tog Pao soto ns [Daahoidime te PP [CE daranoigime to Pe eT [WE ouputenabiowme | woe [tf to to [WE oupitdsasioone | wo [P| Pe fi | OW 4916-578

LC35256A, AS, AM, AT-70/85/10 RCRSRSEAL ASLAM AT 70S Timing Chart Read Cycle"? tac ==, toa = WW WW tcoo FMT MTZ a Lee poe Write Cycle 1 (WE write)*6 two CRS OOOO OOO tos tp NaI

LC35256A, AS, AM, AT-70/85/10 Write Cycle 2 (CE write)*6 tuc cE . NS _ typ °3 twas 1\\ 4 Dour! to High impedance Dour8"s tos tDHs A04920 Note: 1. Set WE high during the read cycle. 2. Extemal reverse phase signals must not be applied when Dour is in the output state. 3. The twp period is defined to be the period where both CE and WE are low. In particular, it is the period between the point where WE falls and the rise of CE or WE, whichever rises first. 4. The toy period is defined to be the period where both CE and WE are low. In particular, itis the period between the point where CE falls and the rise of CE or WE, whichever rises first. _ 5. Dayz 90@s to the high impedance state in any of the following conditions: when OE is high, when CE is high, or when WE is low. 8. OF must be held either high or low during the write cycle. : 7. Dour has the same phase as the write data for this write cyclo Data Retention Characteristics at Ta = -40 to +85°C Syma [Conan im [ema] Daetnion supply vakape Vege Veg=02V [ze ff ss Tv | Tasso [ fer Data retention supply current Voce 30V,VeE2Voc-02v [Taseore | +t ———=«d or daa Tazese [i as Chip enable setup time [con fT es Chip enable hold time Poe Pe Note: 1. Reference values when Voc = 3 V and Ta = 25°C. 2. tao! read cycle time No. 4916-7/8

LC35256A, AS, AM, AT-70/85/10 SO Data Retention Waveforms tcpa Data retention mode ta SF eee, \\ ee RRR / a VOR ~----fannreonnene es tenccnecerenwedyeceenes VeE VaEBVc¢~0.2V GND anne annem nena nanan nnn nn ennnnncen ne nnennrnnnnnnnnnennernneneenecnnene Aoseas 5 V operation: 4.5 V *V, ecu —L 3V operation: 2.7 V a No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. lm Anyone purchasing any products described or contained herein for an above-mentioned use shall: © Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: ® Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. 1 Information {including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production, SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of May, 1996. Specifications and information herein are subject to change without notice. eee No. 4916-8/8