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W3HG128M64EEUXXXD4ISG Datasheet(PDF) 4 Page - White Electronic Designs Corporation |
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W3HG128M64EEUXXXD4ISG Datasheet(HTML) 4 Page - White Electronic Designs Corporation |
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4 / 14 page  W3HG128M64EEU-D4 March 2006 Rev. 0 ADVANCED 4 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs RECOMMENDED DC OPERATING CONDITIONS All voltages referenced to VSS Parameter Symbol Min Max Units Notes Supply Voltage VCC 1.7 1.9 V - I/O Reference Voltage VREF 0.49 x VCC 0.51 x VCC V1 I/O Termination Voltage (system) VTT VREF - 40 VREF + 40 mV 2 NOTE: 1. VREF is expected to equal VCCQ/2 of the transmitting device and to track variations in the DC level of the same. Peak-to-peak noise (non-common mode) on VREF may not exceed ±1 percent of the DC value. Peak-to-peak AC noise on VREF may not exceed ±2 percent of VREF (DC). This measurement is to be taken at the nearest VREF bypass capacitor. 2. VTT is not applied directly to the device. VTT is a system supply for signal termination resistors, is expected to be set equal to VREF and must track variations in the DC level of VREF. ABSOLUTE MAXIMUM DC CHARACTERISTICS Symbol Parameter Min Max Units VCC VCC Supply Voltage Relative to VSS -0.5 2.3 V VIN, VOUT Voltage on any Pin Relative to VSS -0.5 2.3 V TSTG Storage Temperature -55 100 °C TCASE DDR2 SDRAM Device Operating Temperature* 0 85 °C TOPR Operating Temperature (Ambient) 0 65 °C II Input Leakage Current; Any input 0V ≤ VIN ≤ VCC; VREF input 0V ≤ VIN ≤0.95V; (All other pins not under test = 0V) Command/Address, RAS#, CAS#, WE# S#, CKE -40 40 µA CK, CK# -20 20 DM -5 5 IOZ Output Leakage Current; 0V ≤ VOUT ≤ VCCQ; DQs and ODT are disabled DQ, DQS, DQS# -5 5 µA IVREF VREF Leakage Current; VREF = Valid VREF level -16 16 µA * TCASE specifies as the temperature at the top center of the memory devices. CAPACITANCE TA = 25°C, f = 100MHz, VCC = 1.8V, VREF = VSS Parameter Symbol Max Unit Input Capacitance (A0-A12) CIN1 35 pF Input Capacitance (RAS#,CAS#,WE#) CIN2 35 pF Input Capacitance (CKE0) CIN3 31 pF Input Capacitance (CK0, CK0#) CIN4 15 pF Input Capacitance (CS0#) CIN5 31 pF Input Capacitance (DQS0#-DQS17#) CIN6 6pF Input Capacitance (BA0-BA1) CIN7 35 pF Data input/output Capacitance (DQ0-DQ63) COUT 6pF NOTE: * These capacitance values are based on worst case component values in conjunction with the circuit boards associated parasitic net capacitance. |
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