cym1441 Cypress Semiconductor Corporation., cym1441 Datasheet - Page 4

• Manufacturer Part Number: cym1441
• Description: 256k X 8 Static Ram Module
• Manufacturer: Cypress Semiconductor Corporation.

Switching Waveforms
Document #: 38-05271 Rev. **
Read Cycle No. 2
Write Cycle No. 1 (WE Controlled)
Write Cycle No. 2 (CS Controlled)
Notes:
DATAOUT
DATAOUT
8.
9.
ADDRESS
ADDRESS
DATAOUT
CURRENT
DATAIN
DATAIN
SUPPLY
Address valid prior to or coincident with CS transition LOW.
If CS goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
WE
WE
CS
CS
V
CS
CC
[6,8]
HIGH IMPEDANCE
t
PU
(continued)
t
LZCS
t
DATA UNDEFINED
DATA UNDEFINED
SA
t
ACS
[5,9]
[5]
t
SA
50%
t
SCS
t
t
AW
AW
t
RC
t
t
WC
WC
t
HZWE
t
HZWE
DATA VALID
DATA VALID
t
t
PWE
PWE
t
t
t
SCS
SD
SD
DATA VALID
HIGH IMPEDANCE
HIGH IMPEDANCE
t
t
HD
HD
t
LZWE
t
t
HA
HA
t
HZCS
t
PD
50%
IMPEDANCE
CYM1441
HIGH
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