78Q2120 Ver la hoja de datos (PDF) - TDK Corporation
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78Q2120 Datasheet PDF : 33 Pages
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78Q2120
10/100BASE-TX
Ethernet Transceiver
ELECTRICAL SPECIFICATIONS (continued)
DIGITAL TIMING CHARACTERISTICS
TRANSMIT INPUTS TO THE 78Q2120
MII TRANSMIT INTERFACE
CHARACTERISTICS
SYMBOL CONDITIONS
MIN
Setup Time: TX_CLK to
TXSU
15
TXD[3:0], TX_EN, TX_ER
Hold Time: TX_CLK to
TXHD
0
TXD[3:0], TX_EN, TX_ER
CKIN-to-TX_CLK Delay
TCKIN
20
TX_CLK Duty-Cycle
40
NOM MAX
35
60
UNIT
ns
ns
ns
%
MII RECEIVE INTERFACE
CHARACTERISTICS
Receive Output Delay:
RX_CLK to RXD[3:0],
RX_DV, RX_ER
RX_CLK Duty-Cycle
RECEIVE OUTPUTS FROM THE 78Q2120
SYMBOL CONDITIONS
RXDLY
20
MIN
NOM MAX
10
30
40
60
UNIT
ns
%
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