memory products - Al Kossow's Bitsavers

MK48Z08118/09/19(B)-15/20/25AC ELECTRICAL CHARACTERISTICS (POWER-DOWN/POWER-UP TIMING)(O"C sT AS +70"C)SYM PARAMETER MIN MAXtF VPFD (Max) to VpFD (Min) Vee Fall Time 300tFB VPFD (Min) to Vso Vee Fall Time 10tAB Vso to VpFD (Min) Vee Rise Time 1tR VpFD (Min) to VpFD (Max) Vee Rise Time 0tREe E1 or W at V1H or E2 at V1L after Power-Up 120tpFX INT Low to Auto Deselect 10 40tpFH VPFD (Max) to INT High 120tFB VPFD (Min) to Vso 10UNITS NOTES,.s 2,.s 3,.s,.s,.s,.s,.s 4,.sDC ELECTRICAL CHARACTERISTICS (POWER-DOWN/POWER-UP TRIP POINT VOLTAGES)(O"C sT AS + 70 "C)SYM PARAMETER MIN TYPVPFD Power-fail Deselect Voltage (MK48Z08l09) 4.50 4.6VPFD Power-fail Deselect Voltage (MK48Z18119) 4.20 4.3Vso Battery Back-up Switchover Voltage 3MAX4.754.50UNITS NOTESV 1V 1V 1NOTES:1. All voltages referenced to GND.2. VpFD (Max) to VpFD (Min) fall times of less tF may result in deselectioniwriteprotection not occurring until 40 ,.s after Vee passes VpFD (Min). VpFD(Max) to (Min) fall times of less than 10 ¢l may cause corruption of RAM data.3. VpFD (Min) to VSO fall times of less than tFB may cause corruption of RAMdata.4. INT may go high anytime after Vee exceeds VpFD (min) and is guaranteedto go high tpFH after Vee exceeds VpFD (max).CAUTIONNegative Undershoots Below -0.3 volts are not allowedon any pin while in Battery Back-up mode.6112318