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CY7C197(1995) 데이터 시트보기 (PDF) - Cypress Semiconductor
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CY7C197
(Rev.:1995)
256Kx1 Static RAM
Cypress Semiconductor
CY7C197 Datasheet PDF : 10 Pages
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CY7C197
Switching Waveforms
Read Cycle No.1
[12,13]
t
RC
ADDRESS
DATA OUT
t
AA
t
OHA
PREVIOUS DATA VALID
Read Cycle No.2
[12]
t
RC
CE
DATA OUT
V
CC
SUPPLY
CURRENT
t
ACE
t
LZCE
HIGH IMPEDANCE
t
PU
50%
DATA VALID
C197-6
DATA VALID
t
HZCE
HIGH
IMPEDANCE
t
PD
ICC
50%
ISB
Write Cycle No.1 (WE Controlled)
[11]
ADDRESS
CE
WE
DATA IN
DATA OUT
t
WC
t
SCE
t
AW
t
SA
DATA UNDEFINED
t
HA
t
PWE
t
SD
t
HD
DATA VALID
t
HZWE
t
LZWE
HIGH IMPEDANCE
Notes:
12. WE is HIGH for read cycle.
13. Device is continuously selected, CE = V
IL
.
C197-7
C197-8
5
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