CY62256-55 CYPRESS [Cypress Semiconductor], CY62256-55 Datasheet - Page 6

• Manufacturer Part Number: CY62256-55
• Description: 256K (32K x 8) Static RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-05248 Rev. *C
Switching Waveforms
Write Cycle No. 1 (WE Controlled)
Notes:
14. Address valid prior to or coincident with CE transition LOW.
15. Data I/O is high impedance if OE = V
16. If CE goes HIGH simultaneously with WE HIGH, the output remains in a high-impedance state.
17. During this period, the I/Os are in output state and input signals should not be applied.
Read Cycle No. 2
ADDRESS
DATA OUT
Write Cycle No. 2 (CE Controlled)
ADDRESS
CURRENT
DATA I/O
DATA I/O
SUPPLY
CE
WE
V
WE
OE
CE
OE
CE
CC
[13, 14]
NOTE
HIGH IMPEDANCE
17
t
PU
(continued)
t
LZCE
t
SA
IH
t
HZOE
.
t
t
ACE
LZOE
[10, 15, 16]
[10, 15, 16]
t
SA
50%
t
DOE
t
AW
t
AW
t
RC
t
WC
t
WC
DATA
t
t
PWE
SD
DATA
t
IN
SCE
t
SD
VALID
DATA VALID
IN
VALID
t
HD
t
HA
t
HA
t
HD
t
t
HZOE
HZCE
t
PD
50%
CY62256
IMPEDANCE
Page 6 of 12
HIGH
ICC
ISB