memory products - Al Kossow's Bitsavers

ST27256PBLOCK DIAGRAMVee 0-----.GNOO---DATA OUTPUTS00-07A(}·A1tADDRESS IINPUTS,DECODER262.1.4.49ITCELL MATRIXS-7s71ABSOLUTE MAXIMUM RATINGSSymbolVIVppTambTstgParameterAll Input or Output voltages with respect to groundSupply voltage with respect to groundAmbient temperature under biasStorage temperature range. Value+ 6.25 to - 0.6+14 to -0,6-10to +80.- 65 to +125Voltage on pin 24 with respect to ground+ 13.5 to -0.6VStresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating onlyand functional operation of the device at these or any other conditions above those indicated In the operational sections of this specificationis not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.UnitVV·C·COPERATING MODES==-------=MODECE OEVpp Vee OUTPUTSA9 AO (11.13, .(20) (22) (24) (10) (1) (28) 15-19)READ VIL VIL X X Vee Vee DQUTOUTPUT DISABLE VIL VIH X X Vee Vee HIGHZSTANDBY VIH X X X Vee Vee HIGH ZPROGRAM VIL VIH X X Vpp Vee DINVERIFY VIH VIL X X Vpp Vee DQUTOPTIONAL VERIFY VIL VIL X X Vpp Vee DQUTPROGRAM INHIBIT VIH VIH X X Vpp Vee HIGH ZELECTRONIC SIGNATURE VIL VIL VH VIL Vee . Vee ... MAN.CODESVIL VIL VH VIH Vee Vee DEV.CODENOTE: X can be VIH or VIL2110166