CS8904
Crystal LAN™ Quad Ethernet Transceiver
SWITCHING CHARACTERISTICS - MODE 3 (TA = 25 °C; VDD = 5 V; Note 6.)
Parameter
Receive Timing - Start of Frame
RX+/RX- active to RxDATA active
Symbol
Min
Max
Unit
tDATA
tCD
-
-
1200
ns
ns
ns
ns
ns
RX+/RX- active to CD active
800
Receive data setup from RxCLK
Receive data hold from RxCLK
RxCLK shutoff delay from CD active
tRDS
tRDH
tSWS
35
50
-110
-
-
-
Receive Timing - End of Frame
RxDATA throughput delay
tRD
-
-
-
250
400
100
ns
ns
ns
CD turn off delay
tCDOFF
tSWE
RxCLK switching delay after CD off
Transmit Timing
TxENBL setup from TxCLK
tEHCH
tCHEL
tDSCH
tCHDU
tSTUD
tTPD
10
10
10
10
-
-
ns
ns
ns
ns
ns
ns
TxENBL hold after TxCLK
TxDATA setup from TxCLK
TxDATA hold after TxCLK
Transmit startup delay
-
-
-
400
400
Transmit throughput delay
-
Loopback Timing
LOOP setup from TxENBL
tKHEH
tKHEL
tCAEA
10
10
-
-
-
ns
ns
ns
LOOP hold after TxENBL
CD startup delay after TxENBL
255
Notes: 6. COLL asserts active-low in Mode 3.
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
26
DS191PP2
CIRRUS [ CIRRUS LOGIC ]
