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HY5PS12821LF 数据表(PDF) 11 Page - Hynix Semiconductor |
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HY5PS12821LF 数据表(HTML) 11 Page - Hynix Semiconductor |
11 / 35 page Rev. 1.0 / Feb. 2005 11 1HY5PS12421(L)F HY5PS12821(L)F HY5PS121621(L)F 3.1 DC Operating Conditions 3.1.1 Recommended DC Operating Conditions (SSTL_1.8) 3.1.2 ODT DC electrical characteristics Note 1: Test condition for Rtt measurements Note 2: Optional for DDR2-400/533/667 Measurement Definition for Rtt(eff): Apply VIH (ac) and VIL (ac) to test pin separately, then measure current I(VIH (ac)) and I( VIL (ac)) respectively. VIH (ac), VIL (ac), and VDDQ values defined in SSTL_18 Measurement Definition for VM : Measurement Voltage at test pin(mid point) with no load. Symbol Parameter Rating Units Notes Min. Typ. Max. VDD Supply Voltage 1.7 1.8 1.9 V VDDL Supply Voltage for DLL 1.7 1.8 1.9 V 4 VDDQ Supply Voltage for Output 1.7 1.8 1.9 V 4 VREF Input Reference Voltage 0.49*VDDQ 0.50*VDDQ 0.51*VDDQ mV 1, 2 VTT Termination Voltage VREF-0.04 VREF VREF+0.04 V 3 There is no specific device VDD supply voltage requirement for SSTL-1.8 compliance. However under all conditions VDDQ must be less than or equal to VDD. 1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is expected to be about 0.5 x VDDQ of the transmitting device and VREF is expected to track variations in VDDQ. 2. Peak to peak ac noise on VREF may not exceed +/-2% VREF (dc). 3. VTT of transmitting device must track VREF of receiving device. 4. VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and VDDDL tied together PARAMETER/CONDITION SYMBOL MIN NOM MAX UNITS NOTES Rtt effective impedance value for EMRS(A6,A2)=0,1; 75 ohm Rtt1(eff) 60 75 90 ohm 1 Rtt effective impedance value for EMRS(A6,A2)=1,0; 150 ohm Rtt2(eff) 120 150 180 ohm 1 Rtt effective impedance value for EMRS(A6,A2)=1,1; 550 ohm Rtt2(eff) 40 50 60 ohm 1,2 Deviation of VM with respect to VDDQ/2 delta VM -6 +6 % 1 delta VM = 2 x Vm VDDQ x 100% - 1 3. AC & DC Operating Conditons Rtt(eff) = V IH (ac) - VIL (ac) I(V IH (ac)) - I(VIL (ac)) |
类似零件编号 - HY5PS12821LF |
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类似说明 - HY5PS12821LF |
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