CY7C9689
CY7C9689 Receiver TTL Switching Characteristics, FIFO Enabled Over the Operating Range
Parameter
Description
RXCLK Clock Cycle Frequency With Receive FIFO Enabled
RXCLK Input Period
Min.
Max.
Unit
MHz
ns
f
t
t
t
t
t
t
t
t
t
t
t
t
t
50
RIS
20
6.5
6.5
0.7
0.7
4
RXCLKIP
RXCPWH
RXCPWL
RXCLK Input HIGH Time
ns
RXCLK Input LOW Time
ns
[16]
RXCLKIR
[18]
RXCLK Input Rise Time
5
5
ns
[16]
[18]
RXCLK Input Fall Time
ns
RXCLKIF
RXENS
RXENH
RXRSS
RXRSH
RXCES
RXCEH
RXA
Receive Enable Set-Up Time to RXCLK↑
ns
Receive Enable Hold Time from RXCLK↑
1
ns
Receive FIFO Reset (RXRXT) Set-Up Time to RXCLK↑
Receive FIFO Reset (RXRXT) Hold Time from RXCLK↑
Receive Chip Enable (CE) Set-Up Time to RXCLK↑
Receive Chip Enable (CE) Hold Time from RXCLK↑
Flag and Data Access Time From RXCLK↑ to Output
Sample of CE LOW by RXCLK↑, Output High-Z to Active HIGH or LOW,
4
ns
1
ns
4
ns
1
ns
1.5
0
15
ns
[19]
ns
RXZA
or Sample of RXEN Asserted by RXCLK↑, Output High-Z to Active HIGH
or LOW
[19]
t
t
Sample of CE LOW by RXCLK↑ to Output Valid,
1.5
1.5
20
20
ns
ns
RXOE
or Sample of RXEN Asserted by RXCLK↑ to RXDATA Outputs Valid
[19]
Sample of CE HIGH by RXCLK↑ to Output in High-Z,
RXZA
or Sample of RXEN Asserted by RXCLK↑ to RXDATA Outputs in High-Z
CY7C9689 Transmitter TTL Switching Characteristics, FIFO Bypassed Over the Operating Range
Parameter
Description
Min.
2
Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
t
t
t
t
t
t
t
t
t
Flag Access Time From REFCLK↑ to Output
Write Data Set-Up Time to REFCLK↑
15
TRA
4
REFDS
Write Data Hold Time from REFCLK↑
2
REFDH
Transmit Enable Set-Up Time to REFCLK↑
4
REFENS
REFENH
REFCES
REFCEH
REFZA
Transmit Enable Hold Time from REFCLK↑
2
Transmit Chip Enable (CE) Set-Up Time to REFCLK↑
Transmit Chip Enable (CE) Hold Time from REFCLK↑
Sample of CE LOW by REFCLK↑, Output High-Z to Active HIGH or LOW
Sample of CE LOW by REFCLK↑ to Flag Output Valid
Sample of CE HIGH by REFCLK↑ to Flag Output High-Z
4
2
0
1.5
1.5
20
20
REFOE
REFAZ
Note:
19. Parallel data output specifications are only valid if all outputs are loaded with similar DC and AC loads.
24
CYPRESS [ CYPRESS ]
