ICS1894-32
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE PHYCEIVER
IDT®
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 33
ICS1894-32 REV M 021512
DC Operating Characteristics for REFIN
The table below lists the 3.3V DC characteristics for the REFIN pin.
DC Operating Characteristics for MII Pins
The table below lists DC operating characteristics for the Media Independent Interface (MII) for the ICS1894-32.
Timing Diagrams
Timing for Clock Reference (REFIN) Pin
The table below lists the significant time periods for signals on the clock reference (REFIN) pin. The REFIN Timing
Diagram figure shows the timing diagram for the time periods.
REFIN Timing Diagram
Parameter Symbol Min. Max. Units
Input High Voltage V
IH
2.97 – V
Input Low Voltage V
IL
–0.33 V
Parameter Conditions Min. Typ. Max. Units
MII Input Pin Capacitance – – – 8 pF
MII Output Pin Capacitance – – – 14 pF
MII Output Drive Impedance VDDIO = 3.3V – 20 – Ω
Time
Period
Parameter Conditions Min. Typ. Max. Units
t1 REFIN Duty Cycle (MII) – 45 50 55 %
t2 REFIN Period (MII) – – 40 – ns
t1 REFIN Duty Cycle (RMII) – 45 50 55 %
t2 REFIN Period (RMII) – – 20 – ns