memory products - Al Kossow's Bitsavers

MK48C02A/12A(K, N)·15/20/252K x 8 ZEROPOWERTM RAM• LON CURRENT (1 pi. @ 7O"C) BATTERY INPUTFOR 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~U.,NDIP-28(Plastic Package)KPLCC32(Plastic Chip Carrier)• READ-CYCLE TIME EQUALS WRITE-CYCLETIME• LOW-BATTERY WARNING• TWO POWER-FAIL DESELECT TRIP POINTSAVAILABLEMK48C02A 4.75V~VPFD~4.50VMK48C12A 4.50V~VPFD~4.20V• POWER FAIL INTERRUPT OUTPUTRIWPart Number Access Time Cycle TimeMK48CX2A-15 150 ns 150 nsMK48CX2A-20 200 ns 200 nsMK48CX2A-25 250 ns 250 nsFIGURE 1. PIN CONNECTIONSva 1 28 VeeN.C. 2 27 N.C.A7 3 26 INTA. 4 25 A.As 5 24 A.A. 6 23 ViA. 7 22 GA. 8 21 A,.A, 9 20 EA. 10 19 DQ7DQ. 11 18 DQ.DQ, 12 17 DQ.DQ. 13 16 DQ.GND 14 15 DQ.!C ~ ~ ~ ~ ~ II• • • , 32 31 30••A8PIN NAMESAr,- A,o Address Inputs VccSystem Power (+5 V)E Chip Enable W Write EnableGND Ground G Output EnableDOo-D0 7 Data In/Data Out VB Battery InputINTPower Fail Interrupt (Open Drain Type)14 15 16 17 18 19 20NCNo ConnectionJune 19881/10289