SMJ44C256 Datasheet, PDF (18/21 Pages) Texas Instruments – 262144 BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORY

SMJ44C256
262144 BY 4-BIT
DYNAMIC RANDOM-ACCESS MEMORY
SGMS034C – MAY 1989 – REVISED JUNE 1995
PARAMETER MEASUREMENT INFORMATION
RAS
Memory Cycle
tw(RL)
Refresh Cycle
tw(RH)
tw(RL)
Refresh Cycle
tw(RH)
CAS
tw(CL)
td(RLCH)R
A0 – A8
tsu(RA)
th(RA)
tsu(CA)
th(CA)
Row Col
tsu(rd)
W
DQ1–DQ4
ta(R)
th(RHrd)
ta(C)
ta(CA)
ta(G)
G
Don’t Care
Don’t Care
Valid Data
tdis(CH)
tdis(G)
Figure 10. Hidden-Refresh-Cycle (Enhanced Page Mode) Timing
18
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