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TM4EP72BPB Datasheet(PDF) 8 Page - Texas Instruments |
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TM4EP72BPB Datasheet(HTML) 8 Page - Texas Instruments |
8 / 13 page TM4EP72BPB, TM4EP72BJB, 4194304 BY 72BIT TM4EP72CPB, TM4EP72CJB 4194304 BY 72BIT EXTENDEDDATAOUT BUFFERED DYNAMIC RAM MODULES SMMS686A − AUGUST 1997 − REVISED FEBRUARY 1998 8 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 capacitance over recommended ranges of supply voltage and ambient temperature, f = 1 MHz (see Note 2) PARAMETER ’4EP72xxB UNIT PARAMETER MIN MAX UNIT Ci(A) Input capacitance, A0 − A10 6 pF Ci(OE) Input capacitance, OEx 6 pF Ci(CAS) Input capacitance, CASx 6 pF Ci(RAS) Input capacitance, RASx 65 pF Ci(W) Input capacitance, WEx 6 pF Co Output capacitance 9 pF NOTE 2: VDD= NOM supply voltage ± 10%, and the bias on pins under test is 0 V. switching characteristics over recommended ranges of supply voltage and ambient temperature (see Note 3) PARAMETER ’4EP72xxB-50 ’4EP72xxB-60 ’4EP72xxB-70 UNIT PARAMETER MIN MAX MIN MAX MIN MAX UNIT tAA Access time from column address (see Note 4) 30 35 40 ns tCAC Access time from CASx (see Note 4) 18 20 23 ns tCPA Access time from CASx precharge (see Note 4) 33 40 45 ns tRAC Access time from RASx (see Note 4) 50 60 70 ns tOEA Access time from OEx (see Note 4) 18 20 23 ns tCLZ Delay time, CASx to output in low impedance 2 2 2 ns tREZ Output buffer turn off delay from RASx (see Note 5) 3 13 3 15 3 18 ns tCEZ Output buffer turn off delay from CASx (see Note 5) 5 18 5 20 5 23 ns tOEZ Output buffer turn off delay from OEx (see Note 5) 5 18 5 20 5 23 ns tWEZ Output buffer turn off delay from WEx (see Note 5) 3 13 3 15 3 18 ns NOTES: 3. With ac parameters, it is assumed that tT = 2 ns. 4. Access times are measured with output reference levels of VOH = 2 V and VOL = 0.8 V. 5. The maximum values of tREZ, tCEZ, tOEZ, and tWEZ are specified when the outputs are no longer driven. Data in must not be driven until one of the applicable maximum values is satisfied. EDO timing requirements (see Note 3) ’4EP72xxB-50 ’4EP72xxB-60 ’4EP72xxB-70 UNIT MIN MAX MIN MAX MIN MAX UNIT tHPC Cycle time, EDO page mode, read-write 20 25 30 ns tPRWC Cycle time, EDO read-write 55 64 71 ns tCSH Delay time, RASx active to CASx precharge 38 46 56 ns tCHO Hold time, OEx from CASx 7 10 10 ns tDOH Hold time, output from CASx 5 5 5 ns tCAS Pulse duration, CASx active 8 10 000 10 10 000 12 10 000 ns tWPE Pulse duration, WEx active (output disable only) 7 7 7 ns tOCH Setup time, OEx before CASx 8 10 10 ns tCP Pulse duration, CASx precharge 8 10 10 ns tOEP Precharge time, OEx 5 5 5 ns NOTE 3: With ac parameters, it is assumed that tT = 2 ns. |
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