Datasheet

78Q2120C
10/100BASE-TX
Transceiver
Page: 24 of 35 © 2009 Teridian Semiconductor Corporation Rev 1.3
MDIO Interface Input Timing
CHARACTERISTICS SYMBOL CONDITIONS MIN NOM MAX UNIT
Setup Time: MDC to MDIO
MIO
SU
10 ns
Hold Time: MDC to MDIO
MIO
HD
10 ns
Max Frequency: MDC F
max
25 MHz
MDIO as an Input to the 78Q2120C
MDIO Interface Output Timing
CHARACTERISTICS SYMBOL CONDITIONS MIN NOM MAX UNIT
MDC to MDIO data delay MC2D 30 ns
MDIO output from high Z to
driven after MDC
MCZ2D 30 ns
MDIO output from driven to
high Z after MDC
MCD2Z 30 ns
MDIO as an Output from the 78Q2120C
MDC
MDIO
MCZ2D MC2D MCD2Z
MDC
MDIO
MIO
SU
MIO
HD