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TMS44400_1998 Datasheet(PDF) 8 Page - Texas Instruments |
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TMS44400_1998 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page TMS44400, TMS44400P, TMS46400, TMS46400P 1048576-WORD BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORIES SMHS562C – MAY 1995 – REVISED NOVEMBER 1996 8 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 capacitance over recommended ranges of supply voltage and operating free-air temperature, f = 1 MHz (see Note 6) PARAMETER MIN MAX UNIT Ci(A) Input capacitance, A0 – A10 5 pF Ci(RC) Input capacitance, CAS and RAS 7 pF Ci(OE) Input capacitance, OE 7 pF Ci(W) Input capacitance, W 7 pF Co Output capacitance 7 pF NOTE 6: VCC = 5 V ± .5 V for the TMS44400 devices, VCC = 3.3 V ± 0.3 V for the TMS46400 devices, and the bias on pins under test is 0 V. switching characteristics over recommended ranges of supply voltage and operating free-air temperature PARAMETER ’4x400 - 60 ’4x400P - 60 ’4x400 - 70 ’4x400P - 70 ’4x400 - 80 ’4x400P - 80 UNIT MIN MAX MIN MAX MIN MAX tAA Access time from column address 30 35 40 ns tCAC Access time from CAS low 15 18 20 ns tCPA Access time from column precharge 35 40 45 ns tRAC Access time from RAS low 60 70 80 ns tOEA Access time from OE low 15 18 20 ns tCLZ CAS to output in low impedance 0 0 0 ns tOFF Output-disable time after CAS high (see Note 7) 0 15 0 18 0 20 ns tOEZ Output-disable time after OE high (see Note 7) 0 15 0 18 0 20 ns NOTE 7: tOFF is specified when the output is no longer driven. |
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