LXT972 Level One, LXT972 Datasheet - Page 46

• Manufacturer Part Number: LXT972
• Description: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
• Manufacturer: Level One

LXT972 3.3V Dual-Speed Fast Ethernet Transceiver
Figure 31: MDIO Input Timing
Figure 32: MDIO Output Timing
Table 32: MDIO Timing Parameters
46
MDIO setup before MDC,
sourced by STA
MDIO hold after MDC,
MDC to MDIO output delay,
source by PHY
MDC period
sourced by STA
1. Typical values are at 25° C and are for design aid only; not guaranteed and not subject to production testing.
Parameter
M D I O
M D I O
M D C
M D C
Sym
t1
t2
t3
t4
Min
125
10
5
–
t3
t4
Typ
–
–
–
–
1
t1
Max
150
–
–
–
t2
Units
ns
ns
ns
ns
Test Conditions
MDC = 8 MHz
–
–
–