lxt9785 Intel Corporation, lxt9785 Datasheet - Page 178

• Manufacturer Part Number: lxt9785
• Description: Advanced 8-port 10/100 Mbps Phy Transceivers
• Manufacturer: Intel Corporation

LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
180
Figure 41. Intel
Table 62. Intel
RxData output delay from REFCLK
rising edge
RxData Rise/Fall Time
Receive start of /J/ to CRS asserted
Receive start of /T/ to CRS de-
asserted
SYNC setup to REFCLK rising edge
SYNC hold from REFCLK rising edge
NOTE: The table latency values are derived with the hardware configuration pins FIFOSEL[1:0] set at a
1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production
2. “BT” signifies bit times at the line rate (that is, BT = 100 ns if using 10BASE-T, BT = 10 ns if using
testing.
100BASE-TX or 100BASE-FX).
®
®
REFCLK
RxData
LXT9785/LXT9785E SMII - 100BASE-FX Receive Timing Parameters
LXT9785/LXT9785E SMII - 100BASE-FX Receive Timing
SYNC
default configuration of 00 (32 bits of initial fill).
TPFI
Parameter
t
3
t
5
Sym
t1
t2
t3
t4
t5
t6
t
6
Min
1.5
1.5
1.0
–
–
–
t
1
Typ
18
23
–
1
–
–
1
t
2
Max
26
27
5
–
–
–
Units
BT
BT
ns
ns
ns
ns
Revision Date: August 28, 2003
2
2
t
4
Document Number: 249241
Minimum C
Maximum C
Synchronous
sampling of SMII
Synchronous
sampling of SMII
Revision Number: 007
Test Conditions
Datasheet
–
–
–
L
L
= 5 pF
= 20 pF