SMJ44C251B Datasheet, PDF (38/53 Pages) Texas Instruments – 262144 BY 4-BIT MULTIPORT VIDEO RAM

SMJ44C251B
262144 BY 4-BIT
MULTIPORT VIDEO RAM
SGMS058A – MARCH 1995 – REVISED JUNE 1995
PARAMETER MEASUREMENT INFORMATION
RAS
CAS
tw(RH)
td(RHCL)RF
tc(rd)
tw(RL)
td(CLRL)RF
td(RLCH)RF
td(CHRL)
A0 – A8
Don’t Care
DSF
Don’t Care
TRG
Don’t Care
W
Don’t Care
tdis(CH)
DQ0 – DQ3 Valid Out
Hi-Z
NOTE A: In persistent write-per-bit operation, W must be high at the falling edge of RAS during the refresh cycle.
Figure 26. CBR-Refresh-Cycle Timing
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