ASCEND Semiconductor 4Mx4 EDO Data sheetDescriptionThe device CMOS Dynamic RAM organized as 4,194,304 words x 4 bits with extended data out access mode. It is fabricated with an advanced submicron CMOS technology and designed to operate from a single 3.3V oniy power supply. Low voltage operation is more suitable to be used on battery backup, portable elec-tronic application. lt is packaged in JEDEC standard 26/24-pin plastic SOJ or TSOP(II).Features• Single 3.3V(%) only power supply • High speed t RAC acess time: 50/60ns • Low power dissipation- Active mode : 432/396 mW (Mas) - Standby mode: 0.54 mW (Mas)• Extended - data - out(EDO) page mode access • I/O level: CMOS level (Vcc = 3.3V)• 2048 refresh cycle in 32 ms(Std.) or 128 ms(S-version)• 4 refresh modesh: - RAS only refresh- CAS - before - RAS refresh - Hidden refresh - Self-refresh(S-version)10±Pin Name FunctionA0-A10Address inputs- Row address - Column address - Refresh address DQ1~DQ4Data-in / data-out RAS Row address strobe CAS Column address strobe WE Write enable OE Output enable Vcc Power (+ 3.3V)VssGroundVCC 1DQ12DQ23DQ34DQ45VCC6891011 NC 12 WE 13A0 A117 A218 A319VSS RAS CAS OE A8A7A6A5A4VSSAD404M42VSPin Description Pin Configuration21222324 2526151416 A1026/24-PIN 300mil Plastic SOJA9VCC 1DQ12DQ23DQ34DQ45VCC6891011 NC 12 WE 13A0 A117 A218 A319VSS RAS CAS OE A8A7 A6A5 A4VSSAD404M42VT212223242526151416 A1026/24-PIN 300mil Plastic TSOP (ll)A9A0-A10A0-A10A0-A10WECASNO. 2 CLOCK GENERATORCOLUMN ADDRESS BUFFERS (11)REFRESH CONTROLLERREFRESH COUNTERBUFFERS (11)ADDRESS ROW NO. 1 CLOCK GENERATORA0RASA1A2A3A4A5A6A7A8CONTROLLOGICDATA-IN BUFFERDATA-OUT BUFFEROEDQ1.DQ4.COLUMN DECODER2048SENSE AMPLIFIERSI/O GATING2048x42048x2048x4MEMORY ARRAY2048R O W D E C O D E RVcc VssBlock DiagramA9A10TRUTH TABLENotes: 1. EARLY WRITE only.FUNCTIONRASCAS WE OE ADDRESSESDQ SNotesROW COL STANDBY H X X X X High-Z READL L H L ROW COL Data-Out WRITE: (EARLY WRITE )L L L X ROW COL Data-lnREAD WRITE L L ROW COL Data-Out,Data-ln EDO-PAGE-MODE READ1st Cycle L H L ROW COL Data-Out 2nd CycleL H L n/a COL Data-Out EDO-PAGE MODE WRITE1st CycleL L X ROW COL Data-In 2nd Cycle L L Xn/a COL Data-InEDO-PAGE-MODEREAD-WRITE 1st Cycle L ROW COL Data-Out, Data-In 2nd Cycle L n/a COL Data-Out, Data-In HIDDEN REFRESHREAD L H L ROW COL Data-Out WRITEL L X ROW COL Data-In 1RAS-ONLY REFRESH L H X X ROW n/a High-Z CBR REFRESHLHXXXHigh-ZH X →H L →L H →H L →H L →H L →H L →H L →H L →L H →H L →H L →L H→L H L →→L H L→→H L→Absolute Maximum RatingsRecommended DC Operating ConditionsCapacitanceTa = 25°C, V CC = 3.3V%, f = 1MHz Note: 1. Capacitance measured with effective capacitance measuring method. 2. RAS, CAS = V IH to disable Dout.ParameterSymbol Value Unit Voltage on any pin relative to Vss V T -0.5 to + 4.6V Supply voltage relative to Vss V CC -0.5 to + 4.6V Short circuit output current I OUT 50mA Power dissipation P D 1.0WOperating temperature T OPT 0 to + 70°C Storage temperatureT STG-55 to + 125°CParameter/Condition Symbol3.3 Volt VersionUnitMinTyp MaxSupply VoltageV CC 3.0 3.33.6V Input High Voltage, all inputs V IH 2.0-V CC + 0.3V Input Low Voltage, all inputsV IL-0.3-0.8VParameterSymbol Typ Max Unit Note Input capacitance (Address)C I1 -5pF 1Input capacitance (RAS, CAS, OE, WE)C I2-7pF 1Output capacitance(Data-in, Data-out)C I/O-7pF1, 210±DC Characteristics :(T a = 0 to 70°C, V CC = + 3.3V%, V SS = 0V)Parameter Symbol Test Conditions AD404M42V Unit Notes-5-6Min Max Min MaxOperating current I CC1RAS cyclingCAS, cyclingt RC = min-120-110mA1, 2Standby Current LowpowerS-versionI CC2LVTTL interfaceRAS, CAS = V IHDout = High-Z-0.5-0.5mACMOS interfaceRAS, -0.2VDout = High-Z-0.15-0.15mAStandardpowerversionLVTTL interfaceRAS, CAS = V IHDout = High-Z-2-2mACMOS interfaceRAS,-0.2VDout = High-Z-0.5-0.5mARAS- only refresh current I CC3RAS cycling, CAS = V IHt RC = min-120-110mA1, 2 EDO page mode current I CC4t PC = min-90-80mA1, 3CAS- before- RAS refresh current I CC5t RC = minRAS, CAS cycling-120-110mA1, 2Self- refresh current (S-Version)I CC8 - 550 - 55010±CAS V CC≥CAS V CC≥t RASS100µs≥µADC Characteristics :(T a = 0 to 70°C , V CC = +3.3V %, V SS = 0V)Notes:1. I CC is specified as an average current. It depends on output loading condition and cycle rate when the device is selected. I CC max is specified at the output open condition.2. Address can be changed once or less while RAS = V IL .3. For I CC4, address can be changed once or less within one EDO page mode cycle time.Parameter Symbol Test Conditions AD404M42VUnitNotes-5-6Min MaxMin MaxInput leakage current I LI + 0.3V -55-55Output leakage current I LO + 0.3V Dout = Disable -55-55Output high Voltage V OH I OH = -2mA 2.4- 2.4-V Output low voltage V OLI OL = +2mA-0.4-0.4V10±0V Vin V CC ≤≤µA 0V Vout V CC ≤≤µAAC Characteristics(T a = 0 to + 70°C , V cc = 3.3V %, V ss = 0V) *1, *2, *3, *4Test conditions• Output load: one TTL Load and 100pF (V CC = 3.3V %)• Input timing reference levels:V IH = 2.0V, V IL = 0.8V (V CC = 3.3V %)• Output timing reference levels:V OH = 2.0V, V OL = 0.8V10±10±10±Read, Write, Read- Modify- Write and Refresh Cycles (Common Parameters)ParameterSymbol AD404M42V UnitNotes-5-6Min MaxMin MaxRandom read or write cycle time t RC 84-104-ns RAS precharge timet RP 30-40-ns CAS precharge time in normal mode t CPN 10-10-ns RAS pulse width t RAS 50100006010000ns 5CAS pulse width t CAS 8100001010000ns 6Row address setup time t ASR 0-0-ns Row address hold time t RAH 8-10-ns Column address setup time t ASC 0-0-ns 7Column address hold time t CAH 8-10-ns RAS to CAS delay timet RCD 12371445ns 8RAS to column address delay time t RAD 10251230ns 9Column address to RAS lead time t RAL 25-30-ns RAS hold time t RSH 8-10-ns CAS hold timet CSH 38-40-ns CAS to RAS precharge time t CRP 5-5-ns 10OE to Din delay time t OED 12-15-ns Transition time (rise and fall)t T 150150ns 11Refresh periodt REF -32-32ms Refresh period (S- Version)t REF -128-128ms CAS to output in Low- Z t CLZ 0-0-ns CAS delay time from Din t DZC 0-0-ns OE delay time from Dint DZO-0-nsRead CycleWrite Cycle Parameter SymbolAD404M42V Unit Notes-5-6Min Max Min MaxAccess time from RAS t RAC-50-60ns12 Access time from CAS t CAC-14-15ns13, 14 Access time from column address t AA-25-30ns14, 15 Access time from OE t OEA-12-15nsRead command setup time t RCS0-0-ns7 Read command hold time to CAS t RCH0-0-ns10, 16 Read command hold time to RAS t RRH0-0-ns16 Output buffer turn-off time t OFF012015ns17 Output buffer turn-off time from OE t OEZ012015ns17Parameter SymbolAD404M42V Unit Notes -5-6Min Max Min MaxWrite command setup time t WCS0-0-ns7, 18 Write command hold time t WCH8-10-nsWrite command pulse width t WP8-10-nsWrite command to RAS lead time t RWL13-15-nsWrite command to CAS lead time t CWL8-10-nsData-in setup time t DS0-0-ns19 Data-in hold time t DH8-10-ns19 WE to Data-in delay t WED10-10-nsRead- Modify- Write CycleRefresh Cycle Parameter SymbolAD404M42V Unit Notes-5-6Min Max Min MaxRead-modify- write cycle time t RWC108-133-nsRAS to WE delay time t RWD64-77-ns18 CAS to WE dealy time t CWD26-32-ns18 Column address to WE delay time t AWD39-47-ns18 OE hold time from WE t OEH8-10-nsParameter SymbolAD404M42VUnit Notes -5-6Min Max Min MaxCAS setup time (CBR refresh) t CSR5-5-nsCAS hold time (CBR refresh)t CHR8-10-ns10 RAS precharge to CAS hold time t RPC5-5-ns7 RAS pulse width (self refresh)t RASS100-100-RAS precharge time (self refresh)t RPS90-110-nsCAS hold time (CBR self refresh)t CHS-50--50-nsWE setup time t WSR0-0-nsWE hold time t WHR10-10-nsµsEDO Page Mode CycleEDO Page Mode Read Modify Write CycleParameterSymbol AD404M42VUnit Notes-5-6Min MaxMin MaxEDO page mode cycle timet PC 20-25-ns EDO page mode CAS precharge time t CP 10-10-ns EDO page mode RAS pulse width t RASP 5010560105ns 20Access time from CAS precharge t CPA -30-35ns 10, 14RAS hold time from CAS precharge t CPRH 30-35-ns OE high hold time from CAS high t OEHC 5-5-ns OE high pulse widtht OEP 10-10-ns Data output hold time after CAS low t COH 5-5-ns Output disable delay from WEt WHZ 310310ns WE pulse width for output disable whenCAS hight WPZ7-7-nsParameterSymbol AD404M42V Unit Notes -5-6Min MaxMin MaxEDO page mode read- modify- write cycle CAS precharge to WE delay timet CPW 45-55-ns 10EDO page mode read- modify- write cycle timet PRWC56-68-nsNotes :1. AC measurements assume t T = 2ns.2. An initial pause of 100 is required after power up, and it followed by a minimum of eightinitialization cycles (RAS - only refresh cycle or CAS - before - RAS refresh cycle). If the internal refresh counter is used, a minimun of eight CAS - before - RAS refresh cycles are required.3. In delayed write or read-modify-write cycles, OE must disable output buffer prior to applying data to the device.4. All the V CC and V SS pins shall be supplied with the same voltages.5. t RAS (min) = t RWD (min)+t RWL (min)+t T in read-modify-write cycle.6. t CAS (min) = t CWD (min)+t CWL (min)+t T in read-modify-write cycle.7. t ASC (min), t RCS (min), t WCS (min), and t RPC are determined by the falling edge of CAS .8. t RCD (max) is specified as a reference point only, and t RAC (max) can be met with the t RCD (max) limit.Otherwise, t RAC is controlled exclusively by t CAC if t RCD is greater than the specified t RCD (max) limit. 9. t RAD (max) is specified as a reference point only, and t RAC (max) can be met with the t RAD (max) limit.Otherwise, t RAC is controlled exclusively by t AA if t RAD is greater than the specified t RAD (max) limit. 10. t CRP , t CHR , t RCH , t CPA and t CPW are determined by the rising edge of CAS .11. V IH (min) and V IL (max) are reference levels for measuring timing or input signals. Therefore, transitiontime is measured between V IH and V IL .12. Assumes that t RCD tRCD (max) and t RAD t RAD (max). If t RCD or t RAD is greater than the maximum recommended value shown in this table, t RAC exceeds the value shown. 13. Assumes that (max) and (max).14. Access time is determined by the maximum of t AA , t CAC , t CPA . 15. Assumes that (max) and (max). 16. Either t RCH or t RRH must be satisfied for a read cycle.17. t OFF (max) and t OEZ (max) define the time at which the output achieves the open circuit condition (highimpedance). t OFF is determined by the later rising edge of RAS or CAS.18. t WCS , t RWD , t CWD , and t AWD are not restrictive operating parameters. They are included in the datasheet as electrical characteristics only. If (min), the cycle is an early write cycle and the data out will remain open circuit (high impedance) throughout the entire cycle. If (min),(min), (min) and (min), the cycle is a read-modify-write and the data output will contain data read from the selected cell. If neither of the above sets of conditions is satisfied, the condition of the data output (at access time) is indeterminate.19. These parameters are referenced to CAS separately in an early write cycle and to WE edge in adelayed write or a read-modify-write cycle.20. t RASP defines RAS pulse width in EDO page mode cycles.µs ≤≤t RCD t RCD ≥t RADt RAD ≤t RCD t RCD ≤t RAD t RAD ≥t WCS t WCS ≥t RWD t RWD ≥t CWDt CWD ≥t AWD t AWD ≥t CPW t CPW≥Timing Waveforms• Read Cyclet RC t RASt RPtCRPtCPNtRRHtRCHt OEZ t OFF tOEA tCACt AAtRACt CLZD OUTtRCS t ASR tRAH tASC tCAH tRAD t RALtCAStRSH tRCDt TtCSHRASCASADDRESSWEDQ1~DQ4Note : = don’t care OEt OFFRowColumn= Invalid Dout•Early Write CycletRC t RASt RPt WCHt DSt DHt WCS t RALtCAStRSH tRCDt TtCSHRASCASWEDQ1~DQ4tCRPtASRtRAH tASCtCAH ADDRESSColumnRowtCPND INtRADt RAL• Delayed Write CycletRC t RASt RPt RWL t RCSt CAStRSH tRCDt TtCSHRASCAStASR tRAH tCAHADDRESSColumnRow tASC D INDQ1~DQ4WEtCRPtCPNt DHt DSt OEHt OEDOEt DSOPENt WPt CWL• Read - Modify - Write CycletRWC t RASt RPtRWDt WPtRADtRWL tCAStCWL tRCDt TtCPNRASCASWEtCRP t ASRtRAHtASCtCAHADDRESS Column RowDQ1~DQ4t DHt DSOEtRCStAWD tCWD D INt OEDt OEHt OEZt OEA t CAC t RACt AADQ1~DQ4D OUTOPENtDZCtDZO• EDO Page Mode Read CycletRASPtCPRHt RCStCAStRSH tRCDt OEAtCSHRASCAStASRtRAHtCAHADDRESStCASWEtCRPt CPOEDQ1~DQ4OPENtOEPD OUT 1t PCt CPtCAStCPNtCRPtRADtCAHtASCt ASCtCAHt ASCt RAL Row Column 1t OEAt OEHCtRRH tRCHt RACt AAt AAt AA t CPA t CPA t OEZt OFFt OFFt CACt OEZt CAC t CACt COHD OUT NWE OE Column 2Column N Rowt RPD OUT 2• EDO Page Mode Early Write CycletRASPtRPt WCSt CAStRSH tRCDRASCAStASRtRAHtCAHADDRESStCASWEt CPDQ1~DQ4t PCt CPt CAStCPNtCRP tCAH tASCtASC tCAH tASC Row Column 1t DS WE Column 2Column Nt WCH t WCS t WCH t WCS t WCHt DH t DS t DH t DS t DHD IN 1D IN 2D IN Nt TtCSH• EDO Page Mode Read-Early-Write Cyclet RASPtCPRHt RCStCAStRSH tRCDt OEAtCSHRASCAStASRtRAHtCAHADDRESStCASWEtCRPt CPOEDQ1~DQ4OPENtWEDt PCt CPtCAStCPNtCRPtRADtRAHtASCt ASCtCAHt ASCt RAL Row Column 1tWCStRCHt RACt AAt AAt CPA t DHt WHZt CACt CACt COHWE OE Column 2Column N Rowt RPt CAL tWCHDataDoutput 2Data Input NDataDoutput 1t DStCSH• EDO Page Mode Read-Modify-Write Cyclet RASPt CPRHt RCStCASt WP RASCASt ASRtRAHtCAHADDRESSt CASWEtRCDCPDQ1~DQ4tPRWCt CPtCAStCRPtRADtCAHtASCt ASCtCAH tASC Row Column 1tRWLtRCSt OEDt DZOt CAC WE OEt RPt RAL D OUT 2D OUT ND OUT 1tTt Column NColumn 2Column 1tRWD tAWD tCWDtCWLtRCStCWDtAWD tCPW tCWL tCPW tAWD tCWDtCWL t OEDt OEDt OEHt OEHt OEHt CAC t CAC t OEA t AAt RACt OEZt OEAt AA t CPAt OEZt OEAt AA t CPAt OEZ t DSt DHt WP t DSt DHt WP t DSt DHOPENOPENOPEN D IN 1D IN ND IN 2DQ1~DQ4t DZCt DZOt DZCt DZCt DZO• Read Cycle with WE Controlled Disablet WPZt RCStCAStRCDt TtCSHRASCASt ASRtRAHtCAHADDRESSColumnRow tASCD DQ1~DQ4WEt OEZt DSt WHZOEt RCH t OEA t CACt AAt RACt CLZOUTtRADRASADDRESSt RC t CRPt ASRt RAHt Tt RPCROWt OFFCAS t RASt RPOPENt CRPDQ1~DQ4RASt CSRt WSRt RPt T t RPCt OFFCAS t RASt RPOPENt CRPDQ1~DQ4t RPCt CHRt RASt RPt RCt RCt CHRt CSRt WHRt WSRt WHRWECAS-Before-RAS Refresh CycleRASWEt RPCt OFFt CSRt CHSt WSRCASt RASS t RPSOPENDQ1~DQ4t WHRHigh lmpedance• Hidden Refresh Cyclet RPt RASRASt RCDt CRPADDRESSWEt CHRt CASt RSHt RAHt ASRt ASCt CAHt RAL ROW t RCHt OEZCASDQ1~DQ4t Tt RCSD t RASt RASt RPt RPt RC t RCt RCt RADt RRHt OFF t OFFt OEA t CACt AAt RACCOlumnOUTOE(READ)(REFRESH)(REFRESH)Ordering informationAD404M42VSA-5• AD• Ascend Memory Product • 40 • Device Type• 4M4 • Density and Organization • 2• Refresh Rate, 2: 2K Refresh • V• T: 5V, V: 3.3V• S • Package Type (S : SOJ, T : TSOP II)• A• Version• 5• Speed (5: 50 ns, 6: 60 ns)Part Number Access time PackageAD404M42VSA-5AD404M42VSA-6AD404M42VTA-5AD404M42VTA-650 ns 60 ns 50 ns 60 ns300mil 26/24-Pin Plastic SOJTSOP IIPackaging information • 300 mil, 26/24-Pin Plastic SOJ• 300 mil, 26/24-Pin TSOP II。
