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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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TM124MBK36B-80 Datenblatt(PDF) 9 Page - Texas Instruments |
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TM124MBK36B-80 Datenblatt(HTML) 9 Page - Texas Instruments |
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9 / 11 page  TM124MBK36B, TM124MBK36R 1048576 BY 36-BIT TM248NBK36B, TM248NBK36R 2097152 BY 36-BIT DYNAMIC RAM MODULE SMMS137E – JANUARY 1991 – REVISEDJUNE 1995 9 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 switching characteristics over recommended ranges of supply voltage and operating free-air temperature PARAMETER ’124MBK36B-60 ’248NBK36B-60 ’124MBK36B-70 ’248NBK36B-70 ’124MBK36B-80 ’248NBK36B-80 UNIT MIN MAX MIN MAX MIN MAX tCAC Access time from CAS low 15 18 20 ns tAA Access time from column address 30 35 40 ns tRAC Access time from RAS low 60 70 80 ns tCPA Access time from column precharge 35 40 45 ns tCLZ CAS to output in low impedance 0 0 0 ns tOFF Output disable time after CAS high (see Note 6) 0 15 0 18 0 20 ns NOTE 6: tOFF is specified when the output is no longer driven. timing requirements over recommended ranges of supply voltage and operating free-air temperature ’124MBK36B-60 ’248NBK36B-60 ’124MBK36B-70 ’248NBK36B-70 ’124MBK36B-80 ’248NBK36B-80 UNIT MIN MAX MIN MAX MIN MAX tRC Cycle time, random read or write (see Note 7) 110 130 150 ns tRWC Cycle time, read write 130 153 175 ns tPC Cycle time, page-mode read or write (see Note 8) 40 45 50 ns tRASP Pulse duration, page mode, RAS low 60 100 000 70 100 000 80 100 000 ns tRAS Pulse duration, nonpage mode, RAS low 60 10 000 70 10 000 80 10 000 ns tCAS Pulse duration, CAS low 15 10 000 18 10 000 20 10 000 ns tCP Pulse duration, CAS high 10 10 10 ns tRP Pulse duration, RAS high (precharge) 40 50 60 ns tWP Pulse duration, write 15 15 15 ns tASC Setup time, column address before CAS low 0 0 0 ns tASR Setup time, row address before RAS low 0 0 0 ns tDS Setup time, data 0 0 0 ns tRCS Setup time, read before CAS low 0 0 0 ns tCWL Setup time, W low before CAS high 15 18 20 ns tRWL Setup time, W low before RAS high 15 18 20 ns tWCS Setup time, W low before CAS low 0 0 0 ns tWSR Setup time, W high (see Note 9) 10 10 10 ns NOTES: 7. All cycles assume tT = 5 ns. 8. To assure tPC min, tASC should be ≥ 5 ns. 9. CBR refresh only |
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