IC62C256 Datasheet, PDF (7/10 Pages) Integrated Circuit Solution Inc – 32K X 8 LOW POWER CMOS STATIC RAM

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AC WAVE.ORMS
WRITE CYCLE NO. 2^(OE is HIGH During Write Cycle) ^(1,2)
ADDRESS
OE
t WC
VALID ADDRESS
t HA
CS ^LOW
WE
DOUT
t SA
DATA UNDEFINED
t AW
t PWE1
t HZWE
DIN
HIGH-Z
t LZWE
t SD
t HD
DATAIN VALID
WRITE CYCLE NO. 3^(OE is LOW During Write Cycle) ⁽¹⁾
ADDRESS
OE ^LOW
t WC
VALID ADDRESS
t HA
CS _LOW
WE
DOUT
t SA
DATA UNDEFINED
DIN
t AW
t PWE2
t HZWE
HIGH-Z
t LZWE
t SD
t HD
DATAIN VALID
Notes:
1. The internal write time is defined by the overlap of Cs LOW and WE LOW. All signals must be in valid states to initiate a
Write, but any one can go inactive to terminate the Write. The Data Input Setup and Hold timing are referenced to the
rising or falling edge of the signal that terminates the write.
2. I/O will assume the High-Z state if OE ≥ VIH.
Integrated Circuit Solution Inc.
7
ALSR010-0A 05/23/2001