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TMS4256, TMS4257262,144·81T DYNAMIC RANDOM·ACCESS MEMORIESrequirements, and easing board layout. IDD peaks are 150 mA typical, and a -1-V input voltage undershoot can betolerated, minimizing system noise considerations.operation<strong>Al</strong>l inputs and outputs, including clocks, are compatible with Series 74 TTL. <strong>Al</strong>l address and data-in lines are latchedon chip to simplify system design. Data-out is unlatched to allow greater system flexibility.The' 4256 and' 4257 are offered in a 16-pin dual-in-line ceramic or plastic package and are guaranteed for operationfrom 0 DC to 70 DC. These packages are designed for insertion in mounting-hole rows on 300 mil (7,62 mm) centers.address (AO through AS)c-s:Q)jCos:CD3o~-
TMS4256, TMS4257262,144·8IT DYNAMIC RANDOM·ACCESS MEMORIESpage-mode (TMS4256)Page-mode operation allows effectively faster memory access by keeping the same row address and strobing randomcolumn addresses onto the chip. Thus, the time required to setup and strobe sequential row addresses for the samepage is eliminated. The maximum number of columns that can be addressed is determined by tw(RL), the maximumRAS low pulse width. For example, with a minimum cycle time (tc(P) = 100 ns) appr'oximately 100 of the 512 columnsspecified by column AO to column AS can be accessed. Row AS provided in the first page cycle, specifies whichgroup of 512 columns, out of the 1024 internal columns is to be paged.nibble-mode (TMS4257)Nibble-mode operation allows high-speed serial read, write, or read-modify-write access of 1 to 4 bits of data. Thefirst bit is accessed in the normal ~ner wit~ad data coming out at talC) time. The next sequential nibble bitscan be read or written by cycling CAS while RAS remains low. The first bit is determined by the row and columnaddresses, which need to be supplied only for the first access. Row AS and column AS provide the two binary bitsfor initial selection, with row AS being the least significant address. Thereafter, the falling edge of CAS will accessthe next bit of the circular 4-bit nibble in the following sequence:C--(O,O) .. (0,1)--------.,.... ( 1,0) -------1...( l,l):=-JIn nibble-mode, all normal memory operations (read, write, or ready-modify-write) may be performed in any desiredcombination.power-upTo achieve proper device operation. an initial pause of 200 p'S is required after power up followed by a minimum ofeight initialization cycles.logic symbol t(5)RAM 256K X 1AO ....;..;..:...----12009/2100(7)A1(6)A2(12)A3(11)A4A_O_(10)A5262143(13)A6(9)A7(1)ASRAS(4)enCl).(.)'SCl)c......oc.C.::::JtJ)...>oECl)~"Ct:CO~~a:(.)'ECOt:>CCAS(15)23C22W0(3)(2)A,220A\l(14)Qt This symbol is in accordance with IEEE Std 91/ANSI Y32.14 and recent decisions by IEEE and lEe. See explanation on page 10·1.TEXASINSTRUMENTSPOST OFFICE BOX 225012 • DALLAS. TEXAS 752654-65
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SMYOOO2.,MOS MemoryData Book1984II
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ALPHANUMERIC INDEX TO DATA SHEETSSM
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TABLE OF CONTENTSALPHANUMERIC INDEX
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MOSLSIRAMs, ROMs, EPROMsSELECTION G
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If you want to give it a try for yo
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INTERCHANGEABILITY GUIDEPART 1 -ALT
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INTERCHANGEABILITY GUIDEFUJITSUMB 8
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INTERCHANGEABILITY GUIDEMOTOROLAMCM
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INTERCHANGEABILITY GUIDETOSHIBATMM
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INTERCHANGEABILITY GUIDESTATIC RAMS
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Alphanumeric Index, Table of Conten
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GLOSSARY fTIMING CONVENTIONS/DATA S
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GLOSSARY/TIMING CONVENTIONS/DATA SH
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GLOSSARY!TIMING CONVENTIONS/DATA SH
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MOSLSITMS411616,384-811 DYNAMIC RAN
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TMS411616,384·811 DYNAMIC RANDOM·
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1MS411616,384-811 DYNAMIC RANDOM-AC
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TMS411616.384·81T DYNAMIC RANDOM·
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TMS411616,384·811 DYNAMIC RANDOM·
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zIiADDRESSES~!.....RASCASwDO"*. i,*
Page 53 and 54: TMS411616,384-81T DYNAMIC RANDOM-AC
Page 55 and 56: MOSLSITMS416165,536-81T MULTIPORT M
Page 57 and 58: TMS416165,536-811 MULTIPORT MEMORYf
Page 59 and 60: TMS416165,536-BIT MULTIPORT MEMORYs
Page 61 and 62: TMS416165,536-0IT MULTIPORT MEMORYc
Page 63 and 64: TMS416165,536·BIT MUL TIPORT MEMOR
Page 65 and 66: TMS416165,536 o BIT MUL TIPORT MEMO
Page 67 and 68: TMS416165,536·811 MULTIPORT MEMORY
Page 69 and 70: zI[~~~co,.. twiRL) _,RAS:::~ SI l L
Page 71 and 72: TMS416165,536·BIT MULTIPORT MEMORY
Page 73 and 74: ~ ___TMS416165.536-BIT MUL TIPORT M
Page 75 and 76: 0>~a~~i'i_';:;Z~~~d~c:::• s:~lTl~
Page 77 and 78: TMS416165,536-8IT MULTIPORT MEMORY1
Page 79 and 80: MOSLSITMS4164, SMJ416465,536-8IT DY
Page 81 and 82: TMS4164, SMJ416465,536-811. DYNAMIC
Page 83 and 84: TMS416465,536-811 DYNAMIC RANDOM-AC
Page 85 and 86: TMS416465,536·811 DYNAMIC RANDOM·
Page 87 and 88: TMS416465,536-811 DYNAMIC RANDOM-AC
Page 89 and 90: SMJ416465,536-011 DYNAMIC RANDOM-AC
Page 91 and 92: SMJ416465,536-81T DYNAMIC RANDOM-AC
Page 93 and 94: SMJ416465,536-011 DYNAMIC RANDOM-AC
Page 95 and 96: TMS4164, SMJ416465,536·81T DYNAMIC
Page 97 and 98: TMS4164, SMJ416465,536·8IT DYNAMIC
Page 99 and 100: z~~gz~.J:>.c1J
Page 101 and 102: Z~d~~~~0,'...."CIIICCCD:3of. twIRL)
Page 103: MOSLSITMS4256. TMS4257262.144·8IT
Page 107 and 108: TMS4256, TMS4257262,144-8IT DYNAMIC
Page 109 and 110: TMS4256, TMS4257262,144·8IT DYNAMI
Page 111 and 112: TMS4257262.144·8IT DYNAMIC RANDOM
Page 113 and 114: TMS4256, TMS4257262,144·BIT DYNAMI
Page 117 and 118: TMS4257262,144·81T DYNAMIC RANDOM
Page 119 and 120: Z~d~~~~.!..JcoNOTE:'CIIICO(1),- twI
Page 121 and 122: i:Z~d~~z~+:>0Co ......"CCICCCD:3og.
Page 125 and 126: MOSLSITMS4416. SMJ441616.384·WORD
Page 127 and 128: TMS4416, SMJ441616,384·WORD BY 4·
Page 129 and 130: TMS441616,384-WORD BY 4-BI1 DYNAMIC
Page 131 and 132: TMS441616,384-WORD BY 4-BIT DYNAMIC
Page 133 and 134: TMS441616,384-WORD BY 4-BIT DYNAMIC
Page 135 and 136: SMJ441616,384·WORD BY 4·BIT DYNAM
Page 137 and 138: SMJ441616,384-WORD BY 4-B11 DYNAMIC
Page 139 and 140: 1MS4416, SMJ441616,384·WORD BY 4·
Page 141 and 142: TMS4416, SMJ441616,384·WORD BY 4·
Page 143 and 144: z~~~z@towRAs-{rCASAO·A7wDQG:::'.!A
Page 145 and 146: 1:'QltC(()3oc..(()C3~~n_:::Z~~~;;;
Page 147 and 148: MOSLSITMS446465,536-WORD BY 4-BIT D
Page 149 and 150: TMS446465,536-WORD 8Y 4-81T DYNAMIC
Page 151 and 152: TMS446465,536·WORD BY 4·BIT DYNAM
Page 153 and 154: 1MS446465,536·WORD BY 4·B11 DYNAM
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TMS446465,536·WORD BY 4·BIT DYNAM
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TMS446465,536-WORD BY 4-BIT DYNAMIC
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RASCAS----{! '.,ReIVIH i~VIL I tRLC
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~~~n_;;;z~~. ~~tTlg ;O~d ;;;t::=z~@
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~Z~~iZ~tw '"[:;-~~~~~:TCDCO ".;:r0~
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MEMORY SUPPORTLSITMS4500ADYNAMIC RA
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TMS4500ADYNAMIC RAM CONTROLLERpin d
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TMS4500ADYNAMIC RAM CONTROLLERarbit
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TMS4500ADYNAMIC RAM CONTROLLERswitc
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TMS4500ADYNAMIC RAM CONTROLLERacces
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TMS4500ADYNAMIC RAM CONTROLLERoutpu
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TMS4500ADYNAMIC RAM CONTROLLERtypic
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TMS4500ADYNAMIC RAM CONTROLLERtypic
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•••••MOSLSI65,536 X 4 Org
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TM4164EC465,536 BY 4·BIT DYNAMIC R
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MOSLSITM4164EL965,536 BY 9·BIT DYN
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TM4164EL965,536 BY 9-BIT DYNAMIC RA
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••••••••0MOSLSI65,5
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TM4164FL865,536 BY 8·BIT DYNAMIC R
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MOSLSITMS2516. SMJ251616.384-BIT ER
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TMS2516, SMJ251616,384-BIT ERASABLE
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TMS251616,384·BIT ERASABLE PROGRAM
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SMJ251616,384-BIT ERASABLE PROGRAMM
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o 441MS2516, SMJ251616,384·B11 ERA
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MOSLSITMS2532, SMJ253232,768·BIT E
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TMS253232,768-BI1 ERASABLE PROGRAMM
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MOSLSITMS2564, SMJ256465,536-BIT ER
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TMS256465,536-BIT ERASABLE PROGRAMM
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TMS2564 r SMJ256465 r536-BIT ERASAB
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MOSLSITMS2708, TMS27L08, SMJ2708, S
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TMS270B, TMS27LOBSMJ270B, SMJ27LOB1
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TMS2708. TMS27L081024·WORD BY 8·B
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SMJ2708, SMJ27L081024·WORD BY 8·B
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TMS2708, TMS27L08SMJ2708, SMJ27L081
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MOSLSITMS27162048·WORD BY 8·BIT E
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TMS27162048·WORD BY 8·BIT ERASABL
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TMS27162048-WORD BY 8-BIT ERASABLEP
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TMS2732A32,76B-BIT ERASABLE PROGRAM
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TMS2732A32,768-BIT ERASABLE PROGRAM
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TMS2732A32,768·BIT ERASABLE PROGRA
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MOSLSITMS276465,536-BI1 ERASABLE PR
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TMS276465,536·BIT ERASABLE PROGRAM
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MOSLSITMS27128131,072·BIT ERASABLE
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TMS27128131,072·BI1 ERASABLE PROGR
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TMS27128131,072·BIT ERASABLE PROGR
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TMS27128131,072·BIT ERASABLE PROGR
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MOSLSITMS46648192·WORD BY 8·BIT R
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TMS46648192·WORD BY 8·BIT READ·O
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MOSLSITMS47324096~WORD BY B·BIT RE
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MOSLSITMS47648192·WORD BY 8·BIT R
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MOSLSI, TMS49648192·WORD BY 8·BIT
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MOSLSITMS4712816,384·WORD BY 8·BI
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TMS4712816,384·WORD BY 8·BIT READ
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TMS4712816,384-WORD BY 8-BIT READ-O
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MOSLSITMS4725632.768·WORD BY 8·BI
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TMS4725632.768·WORD BY 8·BIT READ
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MOSLSITMS2114, TMS2114L1024·WORD B
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TMS2114, TMS2114L1024·WDRD BY 4·B
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TMS2114. TMS2114L1024·WORD BV 4·B
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ADVANCED MEMORYDEVELOPMENT•Fast A
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TMS2150CACHE ADDRESS COMPARATORabso
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TMS2150CACHE ADDRESS COMPARATORPARA
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MOSLSITMS40162048·WORD BY 8·BIT S
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TMS4016204H-WORD BY H-BIT STATIC RA
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TMS40162048-WDRD BY 8-BIT STATIC RA
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MOSLSITMS4044, TMS40L444096-WORD BY
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TMS4044, TMS40L444096·WORD BY 1·B
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TMS4044, TMS40L444096·WORD BY l·B
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MILITARYCMOSLSISMJ55172048-WORD BY
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SMJ5517204a·WORD BY a·BIT STATIC
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SMJ55172048·WORD BY 8·BIT STATIC
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SMJ55172048-WDRD BY 8-BIT STATIC RA
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SMJ5517204B·WORD BY B·BIT STATIC
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However, the TMS 4164 provides the
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EXPANSION OF 3242 FOR 256-CYCLE REF
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•9-6
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PAD OPENINGIN OVERCOATPADMETALPADME
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Figure 5 shows how the driver outpu
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cpI UO,leWJOJUI suo'le:>!ldd"f\)W(3
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The falling edge of RAS causes R 1
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~--------::~~:~:~~~:--------~~7,34(
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J-Lead AdvantageTexas Instruments P
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Surface Mount Component Availabilit
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fiSECONDARYVAPOR(VAPOR BLANKET)..Fi
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l>'C'2.ri'Q),..o·:::Jen5'....... o
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l>"C'2..(i"Dl...0":=(I)5"....o...3D
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An external refresh counter has bee
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l>'C'CC:)"Q).-+o·::::sen:ro ... ""
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uo!~ew"oJul suo!~ea!ldd"CD .,.., w7
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DOTCLOCKCLOCK ACLOCK C2 xWCLKRAS (A
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B. If dynamic RAM refresh is enable
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•9-38
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The TMS4416/TMS4500A board is arran
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RAS ~CAS \ I2AI \ I '-2BI '-iiD1Ro2
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9-44
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ALEACXRASMAO-MA7CASFIGURE 1 -ALE LE
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The ALE high to ClK low time is giv
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ClKALEACXRASMAO-MA7CASREFREQROY•
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CDinN~1~12 MHzClKINClKOUTWE/iOclKRD
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UO!leWJOJUI SUOlle:ludd"com~'~,i'74
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coen(J)CLOCKWRITEREADROYALEA14-A5MS
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. Access Grant CyclesThe precharge
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whereta(C)tp(BFR)(-103 + tc2 - tp(B
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•9-62
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tt(REH)TCHLLtAEL-RELRAS rise time (
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. Refresh CyclesOn refresh cycles t
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wherethus,fCLKfCLKtCACfCLK[1/2 (tCA
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R/W approach does a normal read-mod
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II(0~""6 MHzI UO!leWJO,ulSUo!le:l!l
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ClKAlE.ACR\ ,----\,\ ,----R/W\ ,---
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4. Row address setup and hold timeT
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CLKrWRITE -------I.~ ..~---REFRESH-
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The read access time on access gran
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implementations in order to relieve
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"C'2..c:rm...o·j(I)....5'o3...mo·
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RELATIVE MEMORY SIZEARCHIVAL STORAG
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increments till satisfied. This pro
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In the example shown in Figure 5, t
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»'C"E..crQ)r+0':::Jtil:;-....o...3
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•9-94
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184LOGIC SYMBOLS1. INTRODUCTIONEXPl
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LOGIC SYMBOLS4.DIAGRAMATIC SUMMARYI
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lOGIC SYMBOLSWhen RAS goes low, it
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MECHANICAL DATAgeneralElectrical ch
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MECHANICAL DATAceramic packages -ce
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MECHANICAL DATAplastic packages (N
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MECHANICAL DATAceramic chip carrier
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Texas InstrumentsSemiconductor Tech
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TI Sales Offices TI DistributorsALA
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Printed in U.S.A.•TEXASINSTRUMENT
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