TLK111_14 Datasheet, PDF (10/110 Pages) Texas Instruments – PHYTER® Industrial Temperature 10/100Mbs Ethernet Physical Layer Transceiver

TLK111
SLLSEF8B – AUGUST 2013 – REVISED JANUARY 2014
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3.2 Power Supply Configuration
The TLK111 provides best-in-class flexibility of power supplies.
3.2.1 Single Supply Operation
If a single 3.3V power supply is desired, the TLK111 internal regulator provides the necessary core supply
voltages. Ceramic capacitors of 10µf and 0.1µf should be placed close to the PFBOUT (pin 23) which is
the output of the internal regulator. The PFBOUT pin should be connected to the PFBIN1 and PFBIN2 on
the board. A small capacitor of 0.1µF should be placed close to the PFBIN1 (pin 18) and PFBIN2 (pin 37).
To operate in this mode, connect the TLK111 supply pins as shown in Figure 3-1.
3.3V
Supply
Pin 22
10mF 10nF 1nF 100pF ^(AVDD33)
0.1μF
0.1μF
Pin 18
(PFBIN1)
10μF
0.1μF
Pin 23
(PFBOUT)
Pin 37
(PFBIN2)
Pin 13
(RD–)
Pin 14
(RD+)
49.9W
49.9W
3.3V
Supply
3.3V
Supply
1mF
0.1mF
1mF
1:1
RD –
RD +
Pin 16
(TD–)
Pin 17
(TD+)
Pin 32
(VDD_IO)
49.9W
3.3V
Supply
1mF
0.1mF*
49.9W
100pF 1nF 10nF 10mF
TD –
TD +
1mF
0.1mF* ^{1:1 T1}
RJ45
3.3V
Supply
Pin 48
(VDD_IO)
100pF 1nF 10nF 10mF
Figure 3-1. Power Connections for Single Supply Operation
10
Hardware Configuration
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