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TMS44100P Datasheet(PDF) 10 Page - Texas Instruments |
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TMS44100P Datasheet(HTML) 10 Page - Texas Instruments |
10 / 25 page TMS44100, TMS44100P, TMS46100, TMS46100P 4194304-WORD BY 1-BIT DYNAMIC RANDOM-ACCESS MEMORIES SMHS561A – MARCH 1995 – REVISED JUNE 1995 10 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 timing requirements over recommended ranges of supply voltage and operating free-air temperature (continued) ’4x100 - 60 ’4x100P - 60 ’4x100 - 70 ’4x100P - 70 ’4x100 - 80 ’4x100P - 80 UNIT MIN MAX MIN MAX MIN MAX tCSR Delay time, CAS low to RAS low (CBR refresh only) 5 5 5 ns tCHS Hold time, CAS low after RAS high, self refresh –50 –50 –50 ns tCWD Delay time, CAS low to W low (read-write operation only) 15 18 20 ns tRAD Delay time, RAS low to column address (see Note 15) 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 15) 20 45 20 52 20 60 ns tRPC Delay time, RAS high to CAS low 0 0 0 ns tRSH Delay time, CAS low to RAS high 15 18 20 ns tRWD Delay time, RAS low to W low (read-write operation only) 60 70 80 ns tTAA Access time from address (test mode) 35 40 45 ns tTCPA Access time from column precharge (test mode) 40 45 50 ns tTRAC Access time from RAS (test mode) 65 75 85 ns tREF Refresh time interval ’4x100 16 16 16 ms tREF Refresh time interval ’4x100P 128 128 128 ms tT Transition time 2 50 2 50 2 50 ns NOTE 15: The maximum value is specified only to assure access time. PARAMETER MEASUREMENT INFORMATION 1.31 V VCC = 5 V CL = 100 pF Output Under Test Output Under Test CL = 100 pF (b) ALTERNATE LOAD CIRCUIT (a) LOAD CIRCUIT RL = 218 Ω R1 = 828 Ω R2 = 295 Ω Figure 1. Load Circuits for Timing Parameters |
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