memory products - Al Kossow's Bitsavers

MK41 H66/MK41 H67(N, P)-20/25/35The MK41H66. Chip Select pin provides a highspeed chip select access, allowing fast read cyclesdespite decoder delays.OPERATIONSREAD MODEThe MK41H6617 is in the Read Mode whenever WE(Write Enable) is high and CE/CS (Chip Enable/Select)is low, providing a ripple-through accessFIGURE 2. READ-READ-READ-WRITE TIMING.. to anyone of 16,384 locations in the static storagearray. Valid data will be available at the Data Outputpin (a) within tM after the last address inputsignal is stable, provld!!]g that the CE/CS accesstime is satisfied. If CE/CS access time is not met,data access will be measured from the limitingparameter (tCM rather than the address. The stateof the Data Output pin is controlled by the CE/CS,and WE control signals. The a may be in an indeterminatestate at tCL' but the a will always have validdata at tAA.t,, __ ~ __ t,, __ ~ __'"=1 -'"=~-~~---~~---~I toe H-I----1 too------'-------'--'----~_____'___'__r t" r----------,--,---------------:---~--j toeQREAD CYCLE TIMINGAC ELECTRICAL CHARACTERISTICS(OOCsTAs70OC) (Vcc = 5.0 V ± 10 percent)SYM PARAMETER MIN MAXtRC Read Cycle Time 20tAA Address Access Time 20teL Chip Enable to Low-Z (MK41H67) 5tCL Chip Select to Low-Z (MK41 H66) 5teA Chip Enable Access Time (MK41H67) 20tCA Chip Select Access Time (MK41H66) 10tRCS Read Command Setup Time 0tRCH Read Command Hold Time 0tOH Valid Data Out Hold Time 5tcz Chip Enable to High-Z (MK41H67) 8tez Chip Select to High-Z (MK41H66) 7twEZ Write Enable to High-Z 8MK41H6X-20 MK41H6X-25 MK41H6X-35MIN MAX MIN MAX UNITS NOTES25 35 ns25 35 ns 15 5 ns 25 5 ns 225 35 ns 112 15 ns 10 0 ns0 0 ns5 5 ns 110 13 ns 28 10 ns 210 13 ns 22110478