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TM124BBK32-60 Datasheet(PDF) 7 Page - Texas Instruments |
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TM124BBK32-60 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 11 page TM124BBK32, TM124BBK32S 1048576 BY 32-BIT TM248CBK32, TM248CBK32S 2097152 BY 32-BIT DYNAMIC RAM MODULE SMMS132D – JANUARY 1991 – REVISED JUNE 1995 7 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) PARAMETER TEST CONDITIONS ’248CBK32-60 ’248CBK32-70 ’248CBK32-80 UNIT PARAMETER TEST CONDITIONS MIN MAX MIN MAX MIN MAX UNIT VOH High-level output voltage IOH = – 5 mA 2.4 2.4 2.4 V VOL Low-level output voltage IOL = 4.2 mA 0.4 0.4 0.4 V II Input current (leakage) VCC = 5 V, VI = 0 V to 6.5 V, All other pins = 0 V to VCC ±20 ±20 ±20 µA IO Output current (leakage) VCC = 5.5 V, VO = 0 V to VCC, CAS high ±20 ±20 ±20 µA ICC1 Read- or write-cycle current (see Note 3) VCC = 5.5 V, Minimum cycle 856 736 656 mA ICC2 Standby current After 1 memory cycle, RAS and CAS high, VIH = 2.4 V (TTL) 32 32 32 mA ICC2 Standby current After 1 memory cycle, RAS and CAS high, VIH = VCC – 0.2 V (CMOS) 16 16 16 mA ICC3 Average refresh current (RAS only or CBR) (see Note 3) VCC = 5.5 V, Minimum cycle, RAS cycling, CAS high (RAS only), RAS low after CAS low (CBR) 1680 1440 1280 mA ICC4 Average page current (see Note 4) VCC = 5.5 V, tPC = minimum, RAS low, CAS cycling 736 656 576 mA NOTES: 3. Measured with a maximum of one address change while RAS = VIL 4. Measured with a maximum of one address change while CAS = VIH capacitance over recommended ranges of supply voltage and operating free-air temperature f = 1 MHz (see Note 5) ’124BBK32 ’248CBK32 UNIT MIN MAX MIN MAX UNIT Ci(A) Input capacitance, address inputs 40 80 pF Ci(R) Input capacitance, RAS 28 28 pF Ci(C) Input capacitance, CAS 14 28 pF Ci(W) Input capacitance, W 56 112 pF Co(DQ) Output capacitance on DQ pins 7 14 pF NOTE 5: VCC = 5 V ± 0.5 V and the bias on pins under test is 0 V. switching characteristics over recommended ranges of supply voltage and operating free-air temperature PARAMETER ’124BBK32-60 ’248CBK32-60 ’124BBK32-70 ’248CBK32-70 ’124BBK32-80 ’248CBK32-80 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 tCLZ CAS to output in low Z 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. |
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