ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
DC Operating Characteristics for REF_IN
The table below lists the 3.3V DC characteristics for the REF_IN pin.
Parameter
Input High Voltage
Input Low Voltage
Symbol
Min.
2.97
–
Max.
–
Units
V
V
V
IH
V
0.33
IL
DC Operating Characteristics for MII Pins
The table below lists DC operating characteristics for the Media Independent Interface (MII) for the ICS1894-40.
Parameter
Conditions
Min.
Typ.
–
Max.
Units
pF
MII Input Pin Capacitance
MII Output Pin Capacitance
MII Output Drive Impedance
–
–
–
–
8
14
–
–
–
pF
VDDIO = 3.3V
20
Ω
Timing Diagrams
Timing for Clock Reference (REF_IN) Pin
The table below lists the significant time periods for signals on the clock reference (REF_IN) pin. The REF_IN
Timing Diagram figure shows the timing diagram for the time periods.
Time
Parameter
Conditions
Min. Typ. Max. Units
Period
t1
t2
t1
t2
REF_IN Duty Cycle (MII)
REF_IN Period (MII)
–
–
–
–
45
–
50
40
50
20
55
–
%
ns
%
REF_IN Duty Cycle (RMII)
REF_IN Period (RMII)
45
–
55
–
ns
REF_IN Timing Diagram
t1
REF_IN
t2
IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
33
ICS1894-40
REV G 060110
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
