1 - Al Kossow's Bitsavers

TMS441616,384-WORD BY 4-BIT DYNAMIC RAMtiming requirements over recommended supply voltage range and operating free-air temperature rangePARAMETERtc(P)Page mode cycle timetc(rd) Read cycle time *tc(W) Write cycle timetc(rdW) Read-write/read·modify·write cycle timetw(CH) Pulse width, CAS high (precharge time) * *tw(CL) Pulse width, CAS low ttw(RH) Pulse width RAS high (precharge time)twiRl) Pulse width, RAS low*tw(W) Write pulse widthttTransition times (rise and fall) for RAS and CAStsu(CA) Column address setup timetsu(RA) Row address setup timetsu(D) Data setup timetsu(rd) Read command setup timetsu(WCH) Write command setup time before CAS hightsu(WRH) Write command setup time before RAS highth(CLCA) Column address hold time after CAS lowth(RA) Row address hold timeth(RLCA) Column address hold time after RAS lowth(CLD) Data hold time after CAS lowth(RLD) Data hold time after RAS lowth(WLD) Data hold time after W lowth(RHrd) Read command hold time after RAS highth(CHrd) Read command hold time after CAS highth(CLW) Write command hold time after CAS lowth(RLW) Write command hold time after RAS lowtRLCH Delay time,RAS low to CAS hightCHRL Delay time, CAS high to RAS lowtCLRH Delay time, CAS low to RAS highDelay time, CAS low to W lowtCLWL(read, modify-write· cycle only) •••Delay time, RAS low to CAS lowtRLCL(maximum value specified only to guarantee access time)Delay time, RAS low to W lowtRLWL(read modify-write-cYcie only) • * *tWLCL Delay time, W low to CAS low (early write cycle)tGHD Delay time, G high before data applied at DQtrfRefresh time intervalALT.SYMBOLtpctRCtwctRWCtcptCAStRPtRAStwptTtASCtASRtDStRCStCWLtRWLtCAHtRAHtARtDHtDHRtDHtRRHtRCHtWCHtWCRtCSHtCRP.tRSHtCWDtRCDtRWDtwcstREFTMS4416-15 TMS4416-20MIN MAX MIN MAXUNIT140 210 ns260 330 ns260 330 ns360 440 ns50 80 ns80 10,000 120 10,000 ns100 120 ns150 10,000 200 10,000 ns40 50 ns3 50 3 50 ns0 0 ns0 0 ns0 0 ns0 0 ns60 80 ns60 80 ns40 50 ns20 25 ns110 130 ns60 80 ns130 160 ns40 50 ns10 10 ns0 0 ns60 80 ns130 160 ns150 200 ns0 0 ns80 120 ns120 150 ns20 70 25 80 ns190 230 ns-5 -5 ns30 40 ns4 4 mst/)Q)CJ-SQ)c+oJ...o0.0.:1en>-...oEQ)~"Cc:::CO~