TLK2226_09 Datasheet, PDF (10/52 Pages) Texas Instruments – 6 PORT GIGABIT ETHERNET TRANSCEIVER

TLK2226
SLLS689D – JANUARY 2006 – REVISED DECEMBER 2006
MDIO TIMING REQUIREMENTS
over recommended operating conditions (unless otherwise noted)
t_period
t_setup
t_hold
T_data
PARAMETER
MDC period
MDIO setup to ↑ MDC
MDIO hold to ↑ MDC
MDC ↑ to MDIO valid
TEST CONDITIONS
See Figure 11
See Figure 11
See Figure 11
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MIN NOM MAX UNIT
400
ns
10
ns
10
ns
0
300
ns
MDC
t PERIOD
t SETUP
t HOLD
MDIO
Figure 11. MDIO Read/Write Timing
TXP
TXN
50 ohm transmission line
50 ohm transmission line
RXP
VDDA
50
4.2K
50
6.3K
GND
RXN
TRANSMITTER
MEDIA
RECEIVER
Figure 12. Example High Speed I/O AC Coupled Mode
10
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