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CY7C109
CY7C1009
Document #: 38-05032 Rev. **
Page 6 of 12
Data Retention Waveform
Switching Waveforms
Read Cycle No. 1[10, 11]
Read Cycle No. 2 (OE Controlled)[11, 12]
Notes:
10. Device is continuously selected. OE, CE1 = VIL, CE2 = VIH.
11. WE is HIGH for read cycle.
12. Address valid prior to or coincident with CE1 transition LOW and CE2 transition HIGH.
4.5V
4.5V
CE
VCC
tCDR
VDR > 2V
DATA RETENTION MODE
tR
109-5
PREVIOUS DATA VALID
DATA VALID
tRC
tAA
tOHA
109–6
ADDRESS
DATA OUT
109–7
50%
50%
DATA VALID
tRC
tACE
tDOE
tLZOE
tLZCE
tPU
HIGH IMPEDANCE
tHZOE
tHZCE
tPD
HIGH
OE
CE1
ICC
ISB
IMPEDANCE
ADDRESS
CE2
DATA OUT
VCC
SUPPLY
CURRENT