ICS1894-40 Datasheet, PDF (32/52 Pages) Integrated Device Technology – 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE

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.
Note: The REF_IN input switch point is 50% of VDD.
Parameter
Input High Voltage
Input Low Voltage
Symbol
V_IH
V_IL
Test Conditions
VDD_IO = 3.47 V
VDD_IO = 3.14 V
Min.
2.97
–
Max.
–
0.33
Units
V
V
DC Operating Characteristics for Media Independent Interface
The table below lists DC operating characteristics for the Media Independent Interface (MII) for the ICS1894-40.
Parameter
MII Input Pin Capacitance
MII Output Pin Capacitance
MII Output Drive Impedance
Conditions
–
–
VDD_IO = 3.3V
Min.
–
–
–
Typ.
–
–
60
Max.
8
14
–
Units
pF
pF
Ω
Timing Diagrams
Timing for Clock Reference In (REF_IN) Pin
The table below lists the significant time periods for signals on the clock reference in (REF_IN) pin. The REF_IN
Timing Diagram figure shows the timing diagram for the time periods.
Note: The REF_IN switching point is 50% of VDD.
Time
Period
Parameter
t1 REF_IN Duty Cycle
t2 REF_IN Period
Conditions
–
–
Min. Typ. Max. Units
45
50
55
%
–
40
–
ns
REF_IN Timing Diagram
t1
REF_IN
t2
IDT™ / ICS™ 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE 32
ICS1894-40 REV C 092909