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M378T6553CZ0-CD5 Datasheet(PDF) 11 Page - Samsung semiconductor |
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M378T6553CZ0-CD5 Datasheet(HTML) 11 Page - Samsung semiconductor |
11 / 22 page Rev. 1.2 Aug. 2005 256MB, 512MB, 1GB Unbuffered DIMMs DDR2 SDRAM Absolute Maximum DC Ratings Note : 1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. Storage Temperature is the case surface temperature on the center/top side of the DRAM. For the measurement conditions, please refer to JESD51-2 standard. AC & DC Operating Conditions Recommended DC Operating Conditions (SSTL - 1.8) Note : 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. AC parameters are measured with VDD, VDDQ and VDDL tied together. Symbol Parameter Rating Units Notes VDD Voltage on VDD pin relative to VSS - 1.0 V ~ 2.3 V V 1 VDDQ Voltage on VDDQ pin relative to VSS - 0.5 V ~ 2.3 V V 1 VDDL Voltage on VDDL pin relative to VSS - 0.5 V ~ 2.3 V V 1 VIN, VOUT Voltage on any pin relative to VSS - 0.5 V ~ 2.3 V V 1 TSTG Storage Temperature -55 to +100 °C 1, 2 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 |
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