DP83848J_07 NSC [National Semiconductor], DP83848J_07 Datasheet - Page 32
DP83848J_07
Manufacturer Part Number
DP83848J_07
Description
Manufacturer
NSC [National Semiconductor]
Datasheet
1.DP83848J_07.pdf
(78 pages)
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5.0 Design Guidelines
5.1 TPI NETWORK CIRCUIT
Figure 11 shows the recommended circuit for a 10/100
Mb/s twisted pair interface. To the right is a partial list of
recommended transformers. It is important that the user
realize that variations with PCB and component character-
istics requires that the application be tested to ensure that
the circuit meets the requirements of the intended applica-
tion.
CAPACITORS CLOSE TO
PLACE RESISTORS AND
THE DEVICE.
RD+
RD-
TD-
TD+
49.9 Ω
49.9 Ω
49.9 Ω
49.9 Ω
Figure 11. 10/100 Mb/s Twisted Pair Interface
Vdd
Vdd
0.1µF
0.1µF
32
All values are typical and are +/- 1%
Vdd
Pulse H1102
Pulse H2019
Pulse J0011D21
Pulse J0011D21B
NOTE: CENTER TAP IS PULLED TO VDD
0.1µF*
*PLACE CAPACITORS CLOSE TO THE
0.1µF*
TRANSFORMER CENTER TAPS
COMMON MODE CHOKES
MAY BE REQUIRED.
1:1
1:1
T1
RD-
RD+
TD-
TD+
RJ45
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