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(Advance Version)
IP178A
The major differences in application circuit between IP178 and IP178A
No more external bias and series resistors
IP178
0.1u
AVCC
RXIP
RXIM
95.3 R
95.3 R
RD +
RD -
transformer
IP178A
0.1u
RXIP
RXIM
RD +
RD -
transformer
GND
GND
GND
MDI-MDIX
CT
AVCC
No more A/D bypass capacitors & add a pull up resistor to turn on auto MDI_MDIX
IP178
VRTP
VRBM
VRTM
VRBP
472p
472p
IP178A
NC
NC
NC
NC
MDI_MDIX_EN
R
pin134=NC
VCC
pin134=
Transmit circuit is the same as receive circuit for MDI-MDIX function.
IP178
AVCC
TXOP
TXOM
TD +
TD -
transformer
IP178A
TXOP
TXOM
TD +
TD -
transformer
GND
0.1u
TCT
AVCC
CT
AVCC
MDI-MDIX
Preliminary, Specification subject to change without notice
2
IP178A-DS-P05
Sep. 09, 2002