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VG36643241BT-7 Datasheet(PDF) 7 Page - Vanguard International Semiconductor |
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VG36643241BT-7 Datasheet(HTML) 7 Page - Vanguard International Semiconductor |
7 / 72 page Document : 1G5-0099 Rev.1 Page 7 VIS Preliminary VG3664321(4)1(2)BT CMOS Synchronous Dynamic RAM A. C Characteristics : (Ta = 0 to 70°C VDD = 3.3V 0.3VSS = 0V) Test Conditions for LVTTL Compatible : AC input Levels (VIH/VIL) 2.0/0.8V Input timing reference level/ Output timing reference level 1.4V Input rise and fall time 1ns Output load condition 50pF ± Test Conditions for SSTL - 3 Interface Input Hihg (min)/Input low (max) Voltage VREF + 0.4V/ VREF - 0.4V Input Reference Voltage (VREF) 0.45 x VDDQ Timing Reference Levels of Output Signals 0.45 x VDDQ Input Signal MAX. Slew Rate 1V/ns Input Signal MAX. Peak to Peak Swing 2.0V Output Circuit See Figure Below Min. Required output pull - up under AC test load VTT + 0.8V Min. Required output pull - down under AC test load VTT - 0.8V Ω AC Test Load Circuits (for LVTTL interface) : VDDQ VDDQ VOUT Device Under Test 50PF Z = 50 VDDQ VREF VOUT Device Under Test VDDQ 0.45 * VDDQ RS = 25Ohms RT1 = 50 Ohms VTT = 0.45 * VDDQ VREF = 0.45 * VDD VTT = 0.45 * VDDQ RT2 = 50 Ohms CLOAD = 30 pF Z = 50 Ohms VIN VSS AC Test Load Circuits (for SSTL - 3 interface) : 50 1.4V Ω |
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