CY7C199
Document #: 38-05160 Rev. ** Page 6 of 16
Switching Characteristics Over the Operating Range[3,7] (continued)
7C199-20 7C199-25 7C199-35 7C199-45
Parameter Description Min. Max. Min. Max. Min. Max. Min. Max. Unit
READ CYCLE
tRC Read Cycle Time 20 25 35 45 ns
tAA Address to Data Valid 20 25 35 45 ns
tOHA Data Hold from Address
Change 333 3ns
tACE CE LOW to Data Valid 20 25 35 45 ns
tDOE OE LOW to Data Valid 9 10 16 16 ns
tLZOE OE LOW to Low Z[8] 000 0ns
tHZOE OE HIGH to High Z[8, 9] 9111515ns
tLZCE CE LOW to Low Z[8] 333 3ns
tHZCE CE HIGH to High Z[8, 9] 9111515ns
tPU CE LOW to Power-Up 0 0 0 0 ns
tPD CE HIGH to Power-Down 20 20 20 25 ns
WRITE CYCLE[10,11]
tWC Write Cycle Time 20 25 35 45 ns
tSCE CE LOW to Write End 15 18 22 22 ns
tAW Address Set-Up to Write End 15 20 30 40 ns
tHA Address Hold from Write End 0 0 0 0 ns
tSA Address Set-Up to Write Start 0 0 0 0 ns
tPWE WE Pulse Width 15 18 22 22 ns
tSD Data Set-Up to Write End 10 10 15 15 ns
tHD Data Hold from Write End 0 0 0 0 ns
tHZWE WE LOW to High Z[9] 10 11 15 15 ns
tLZWE WE HIGH to Low Z[8] 333 3 ns
Switching Waveforms
Read Cycle No. 1[12, 13]
Notes:
12. Device is continuously selected. OE, CE = VIL.
13. WE is HIGH for read cycle.
ADDRESS
DATA OUT PREVIOUS DATA VALID DATA VALID
tRC
tAA
tOHA
C199–8