ICS1894-40
10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
PHYCEIVER
Crystal or Oscillator Connection
NOTE: 25 pF crystal load
ICS1894-40
capacitors were required to
bring the ppm for the 25 MHz
crystal within the ±50 ppm on
the IDT 1894 PHY evaluation
board. The crystal used had a
recommended load capacitance
of 18 pF.
MII w/ Crystal Input
REF_OUT
36
REF_IN
37
25.000MHz
25 pF
25 pF
ICS1894-40
REF_OUT
REF_IN
37
MII w/ Oscillator Input
36
NC
33 Ohm (optional)
CMOS
25.000
MHz
10 pF (optional)
ICS1894-40
REF_OUT
36
REF_IN
37
RMII w/ Oscillator Input
NC
33 Ohm (optional)
CMOS
50.000
MHz
10 pF (optional)
IDT® 10BASE-T/100BASE-TX INTEGRATED PHYCEIVER WITH RMII INTERFACE
13
ICS1894-40
REV G 060110
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
