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IS43DR86400B Datasheet(PDF) 18 Page - Integrated Silicon Solution, Inc |
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IS43DR86400B Datasheet(HTML) 18 Page - Integrated Silicon Solution, Inc |
18 / 29 page IS43/46DR86400B, IS43/46DR16320B Integrated Silicon Solution, Inc. – www.issi.com – 18 Rev. I, 8/01/2012 ODT DC Electrical Characteristics Parameter/Condition Symbol Min. Nom. Max. Units Notes Rtt effective impedance value for EMRS(A6=0, A2=1); 75 ohm Rtt1(eff) 60 75 90 ohms 1 Rtt effective impedance value for EMRS(A6=1, A2=0); 150 ohm Rtt2(eff) 120 150 180 ohms 1 Rtt effective impedance value for EMRS(A6=A2=1); 50 ohm Rtt3(eff) 40 50 60 ohms 1 Deviation of VM with respect to VDDQ/2 deltaVM -6 +6 % 2 Note: 1. Measurement Definition for Rtt(eff): Apply VIH(AC) and VIL(AC) to test pin seperately, then measure current I(VIH(AC)) and I(VIL(AC)) respectively )) AC ( VIL (I )) AC ( VIH (I ) AC ( VIL ) AC ( VIH ) eff ( Rtt − − = 2. Measurement Defintion for VM: Measure voltage (VM) at test pin (midpoint) with no load: % 100 x 1 VDDQ VM x 2 VM − = ∆ ODT AC Electrical Characteristics and Operating Conditions Symbol Parameter/Condition Min. Max. Units Notes tAOND ODT turn-on delay 2 2 tCK tAON ODT turn-on tAC(Min) tAC(Max)+1ns ns 1 tAONPD ODT turn-on (Power-Down Mode) tAC(Min)+2 ns 2tCK+tAC(Max)+1ns ns 3 tAOFD ODT turn-off delay 2.5 2.5 tCK tAOF ODT turn-off tAC(Min) tAC(Max)+0.6ns ns 2 tAOFPD ODT turn-off (Power-Down Mode) tAC(Min)+2ns 2.5tCK+tAC+1ns ns 3 tANPD ODT to Power-Down Mode Entry L:atency 3 tCK 4 tAXPD ODT Power Down Exit Latency 8 tCK 4 Notes: 1. ODT turn on time min is when the de vice leaves high impedance and ODT resistance begins to turn on. ODT turn on time max is when the ODT resistance is fully on. Both are measured from t AOND. 2. ODT turn off time min is when the device starts to turn-off ODT resistance. ODT turn off time max is when the bus is in high impedance. Both are measured from tAOFD. 3. For Standard Active Power-Down (with MR S A12 = “0”), the non power -down timings (tAOND, tAON, tAOFD and tAOF) apply. 4. tANPD an d tAXPD define the timing limit when either Power Down Mode Timings (tAONPD, tAOFPD) or Non-Power Down Mode timings ( tAOND, tAOFD) have to be applied |
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