MEMORY DATABOOK - Al Kossow's Bitsavers

• DYNAMIC RAM • MSM414256RS .-----------------AC CHARACTERISTICS (CONT.)ParameterMSM414256-10 MSM41 4256-12Symbolr-----.-----+------r----~MIN MAX MIN MAXUnitNoteWrite command pulse widthtwp 30 35nsWrite command to RAS lead time40 40nsWrite command to CAS lead time,Data-in set-up timetCWL 40 40tDS o onsnsData-in hold time30 35nsData-in hold time from RAS80 95nsCAS to WE delayRAS to WE delayRead command hold timereference to RASAccess time from OEOE data delay timeOE hold timeTurn-off delay time from OEOE set-up timeRAS to CAS set-up time(CAS before RAS)RAS to CAS hold time(CAS before RAS)CAS active delay from RASprechargeCAS precharge time(CAS before RAS)Read/write cycle(Refresh counter test)RAS pulse width(Refresh counter test)CAS precharge time(Refresh counter test)tCWD 80 90tRWD 130 150tRRH 20 20tOEA 30 30tOED 25 25tOEH o otOEZ o 25 o 25tOES 30 30tFCS 20 25tFCH 30 30tRPC 20 20tCPR 20 25385 435tTRAS 285 10000 325 10000tCPT 50 - 60 -ns 9ns 9ns 10nsnsns 11nsnsnsnsnsnsns 11ns 11ns 11Read/write cycle time (Page mode) tpRWC 175 195ns182