CS8904
Crystal LAN™ Quad Ethernet Transceiver
SWITCHING CHARACTERISTICS - MODE 1 (TA = 25 °C; VDD = 5 V; Note 4.)
Parameter
Receive Timing - Start of Frame
RX+/RX- active to RxDATA active
Symbol
Min
Max
Unit
tDATA
tCD
tRDS
tRDH
-
1200
ns
ns
ns
ns
RX+/RX- active to CD active
Receive data setup from RxCLK
Receive data hold from RxCLK
-
620
35
50
-
-
Receive Timing - End of Frame
RxCLK hold after CD off
tRCH
tRD
5
-
-
bit times
ns
RxDATA throughput delay
CD turn off delay
250
400
tCDOFF
-
ns
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
80
-
-
-
ns
ns
ns
LOOP hold after TxENBL
CD startup delay after TxENBL
Notes: 4. COLL asserts active-high in Mode 1.
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
22
DS191PP2
CIRRUS [ CIRRUS LOGIC ]
