MEMORY DATABOOK - Al Kossow's Bitsavers

.EPROM·MSM27256AS •• ----------------------------------------DC CHARACTERISTICS(VCC = 5V±5%, Vpp = VCC, Ta = O°C -70°C)LimitsParameter Symbol Conditions UnitMin. Typ. Max.Input Leakage Current III VIN =5.25V - - 10 /-lAOutput Leakage Current ILO VOUT =5.25V - - 10 /-lAVCC Power Current (Stand-by) ICC, CE =VIH - - 35 mAVCC Power Current (Operation) ICC2 CE =VIL - - 100 mAProgram Power Current Ipp, Vpp=VCC - - 5 mAInput Voltage "H" Level VIH - 2.0 - VCC+1 VInput Voltage "L" Level VIL - -0.1 - 0.8 VOutput Voltage "H" Level VOH IOH =-400/-lA 2.4 - - VOutput Voltage "L" Level VOL IOL =2.1 mA - - 0.45 VAC CHARACTERISTICS(VCC = 5V±5%, Vpp = VCC, Ta = O°C -70°C)27256-15 27256-20 27256-25Parameter Symbol Conditions UnitMin. Max. Min. Max. Min. Max.Address Access Time tACC CE =OE =VIL - 150 - 200 - 250 nsCE Access Time tCE OE =VIL - 150 - 200 - 250 nsOE Access Time tOE CE =VIL - 70 - 75 - 100 nsOutput Oisable Time tOF CE =VIL 0 50 0 55 0 60 nsMeasurement conditionInput pulse level .......................... 0.45V and 2.4VInput timing reference level ............... 0.8V and 2.0VOutput load .............................. 1 TTL GATE + 100pFOutput timing reference level .............. 0.8V and 2.0V380