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TM248CBK32F-70 Datasheet(PDF) 7 Page - Texas Instruments |
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TM248CBK32F-70 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 9 page TM124BBK32F, TM124BBK32U 1048576 BY 32BIT DYNAMIC RAM MODULE TM248CBK32F, TM248CBK32U 2097152 BY 32BIT DYNAMIC RAM MODULE SMMS649A − DECEMBER 1994 − REVISED JUNE 1995 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 timing requirements over recommended ranges of supply voltage and operating free-air temperature (continued) ’124BBK32F - 60 ’248CBK32F - 60 ’124BBK32F - 70 ’248CBK32F - 70 ’124BBK32F - 80 ’248CBK32F - 80 UNIT MIN MAX MIN MAX MIN MAX UNIT tWCH Hold time, W low after CAS low 10 15 15 ns tWRH Hold time, W high after RAS low (CBR refresh only) 10 10 10 ns tCHR Delay time, RAS low to CAS high (CBR refresh only) 10 10 10 ns tCRP Delay time, CAS high to RAS low 5 5 5 ns tCSH Delay time, RAS low to CAS high 60 70 80 ns tCSR Delay time, CAS low to RAS low (CBR refresh only) 5 5 5 ns tRAD Delay time, RAS low to column address (see Note 10) 15 30 15 35 15 40 ns tRAL Delay time, column address to RAS high 30 35 40 ns tCAL Delay time, column address to CAS high 30 35 40 ns tRCD Delay time, RAS low to CAS low (see Note 10) 20 45 20 52 20 60 ns tRPC Delay time, RAS high to CAS low (CBR only) 0 0 0 ns tRSH Delay time, CAS low to RAS high 15 18 20 ns tREF Refresh time interval 16 16 16 ms tT Transition time 3 30 3 30 3 30 ns NOTE 10: The maximum value is specified only to assure access time. device symbolization (TM124BBK32F illustrated) TM124BBK32F -SS YYMMT YY = Year Code MM = Month Code T = Assembly Site Code -SS = Speed Code NOTE: Location of symbolization may vary. |
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