memory products - Al Kossow's Bitsavers

t=-: SGS-THOMSONIt., L ~O©OO@~[!,[~©'U'oo@~o©~MKI48Z02/12(B)-15/20/252K x 8 ZEROPOWERTM RAM• INDUSTRIAL TEMPERATURE RANGE -40°Cto +85°C• PREDICTED WORST CASE BATTERY LIFE OF6 YEARS @ 85 OC• DATA RETENTION IN THE ABSENCE OFPOWER• DATA SECURITY PROVIDED BY AUTOMATICWRITE PROTECTION DURING POWERFAILURE• +5 VOLT ONLY READIWRITE• CONVENTIONAL SRAM WRITE CYCLES• LOW POWER-440 mW ACTIVE; 5.5 mWSTANDBY• 24-PIN DUAL IN LINE PACKAGE, JEDEC 24 PINMEMORY PINOUT• READ-CYCLE TIME EQUALS WRITE-CYCLETIME• ON BOARD LOW-BATTERY WARNING CIR­CUITRY• TWO POWER-FAIL DESELECT TRIP POINTSAVAILABLEMK148Z02 4.75V~VPFD~4.50VMKI48Z12 4.50V~VPFD~4.20VR/WPart Number Access Time Cycle TimeMK148ZX2-15 150 ns 150 nsMK148ZX2-20 200 ns 200 nsMKI48ZX2-25 250 ns 250 nsBDIP-24(Plastic with Battery Top Alt)FIGURE 1_ PIN CONNECTIONSA7 1 24 VeeAs 2 23 AsAs 3 22 AgA4 4 21 ViA3 5 20 GA2 6 19 A,oA, 7 18 EAo 8 17 DQ7DQo 9 16 DQsDQ, 10 15 DQsDQ2 11 14 DQ4GND 12 13 DQ3TRUTH TABLE (MKI48Z02/12)Vcc E Cl W MODE DQVIH X X Deselect High-ZVee (Min) VIL VIL VIH Read DOUTVIL VIH VIH Read High-ZVsoDeselectsVso X X X Battery High-ZBack-upPIN NAMESAo - A10 Address Inputs Vee System Power (+5 V)E Chip Enable W Write EnableGND Ground G Output EnableDao-Da7 Data InlData OutJune 19881/11325