Cypress CY7C145 - Manual (Page 7)

CY7C145, CY7C144
Document #: 38-06034 Rev. *D Page 7 of 21
t
SD
Data Set-Up to Write End 10 15 15 25 ns
t
HD
Data Hold From Write End 0 0 0 0 ns
t
HZWE
[11,12] R/W LOW to High Z 10 15 20 25 ns
t
LZWE
[11,12] R/W HIGH to Low Z 3 3 3 3 ns
t
WDD
[13] Write Pulse to Data Delay 30 50 60 70 ns
t
DDD
[13] Write Data Valid to Read Data
Valid
25 30 35 40 ns
BUSY TIMING
[14]
t
BLA
BUSY LOW from Address
Match
15 20 20 30 ns
t
BHA
BUSY HIGH from Address
Mismatch
15 20 20 30 ns
t
BLC
BUSY LOW from CE LOW 15 20 20 30 ns
t
BHC
BUSY HIGH from CE HIGH 15 20 20 30 ns
t
PS
Port Set-Up for Priority 5 5 5 5 ns
t
WB
R/W LOW after BUSY LOW 0 0 0 0 ns
t
WH
R/W HIGH after BUSY HIGH 13 20 30 30 ns
t
BDD
BUSY HIGH to Data Valid 15 25 35 55 ns
INTERRUPT TIMING [14]
t
INS
INT Set Time 15 25 25 35 ns
t
INR
INT Reset Time 15 25 25 35 ns
SEMAPHORE TIMING
t
SOP
SEM Flag Update Pulse (OE
or SEM)
10 10 15 20 ns
t
SWRD
SEM Flag Write to Read Time 5 5 5 5 ns
t
SPS
SEM Flag Contention
Window
5 5 5 5 ns
Notes
13. For information on part-to-part delay through RAM cells from writing port to reading port, refer to Read Timing with Port-to-Port Delay waveform.
14. Test conditions used are Load 2.
Switching Characteristics
Over the Operating Range [9] (continued)
Parameter Description
7C144-15
7C145-15
7C144-25
7C145-25
7C144-35
7C145-35
7C144-55
7C145-55
Unit
Min Max Min Max Min Max Min Max
[+] Feedback