Datasheet

DS_21x3_001 78Q2123/78Q2133 Data Sheet
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Electrical Specifications......................................................................................................................23
4.1 AbsoluteMaximum Ratings .........................................................................................................23
4.2 RecommendedOperatingConditions .........................................................................................23
4.3 DCCharacteristics .......................................................................................................................23
4.4 Digital I/O Characteristics ............................................................................................................24
4.5 DigitalTiming Characteristics ......................................................................................................25
4.5.2 MII Transmit Interface .......................................................................................................25
4.5.3 MII Receive Interface.........................................................................................................26
4.6 MDIO Interface Input Timing ........................................................................................................26
4.6.1 MDIO Interface Output Timing ..........................................................................................27
4.6.2 MDIO Interface Output Timing ..........................................................................................28
4.6.3 100BASE-TX System Timing ............................................................................................29
4.6.4 10BASE-T System Timing.................................................................................................29
4.7 Analog Electrical Characteristics .................................................................................................30
4.7.1 100BASE-TX Transmitter..................................................................................................30
4.7.2 100BASE-TX Transmitter (Informative).............................................................................30
4.7.3 100BASE-TX Receiver......................................................................................................30
4.7.4 10BASE-T Transmitter ......................................................................................................31
4.7.5 10BASE-T Transmitter (Informative) .................................................................................31
4.7.6 10BASE-T Receiver ..........................................................................................................31
4.8 Isolation Transformers .................................................................................................................33
4.9 ReferenceCrystal .........................................................................................................................33
4.9.1 External XTLP Oscillator Characteristics...........................................................................34
5 Package Pin Designations ..................................................................................................................35
6 Package Information............................................................................................................................36
7 Ordering Information...........................................................................................................................36
Revision History ...........................................................................................................................................37
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