TLK105 Datasheet, PDF (8/99 Pages) Texas Instruments – Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer Transceiver

TLK105
TLK106
SLLSEB8A – AUGUST 2012 – REVISED MARCH 2013
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PIN
NAME
AMDIX_EN (RX_ER)
MII_MODE (RX_DV)
TYPE
NO.
DESCRIPTION
28
S, O, PU
This option sets the Auto-MDIX mode. By default, it enables Auto-MDIX. An external pull-
down resistor disables Auto-MDIX mode.
MII Mode Select: This option selects the operating mode of the MAC data interface. This
26 S, O, PD pin has a weak internal pull-down, and it defaults to normal MII operation mode. An
external pull-up causes the device to operate in RMII mode.
3.2 Power Supply Configuration
The TLK10x provides best-in-class flexibility of power supplies.
3.2.1 Single Supply Operation
If a single 3.3V power supply is desired, the TLK10x internal regulator provides the necessary core supply
voltages. Ceramic capacitors of 10µf and 0.1µf should be placed close to the PFBOUT (pin 15) 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 13) and PFBIN2 (pin 24).
To operate in this mode the TLK10x supply pins should be connected as shown in Figure 3-1.
3.3V
Supply
Pin 14
10mF 10nF 1nF 100pF ^(AVDD33)
0.1μF
0.1μF
Pin 13
(PFBIN1)
10μF
0.1μF
Pin 15
(PFBOUT)
Pin 24
(PFBIN2)
Pin 9
(RD–)
Pin 10
(RD+)
49.9W
49.9W
3.3V
Supply
3.3V
Supply
1mF
0.1mF
1mF
1:1
RD –
RD +
Pin 11
(TD–)
Pin 12
(TD+)
49.9W
3.3V
Supply
1mF
0.1mF*
49.9W
TD –
TD +
1mF
0.1mF* ^{1:1 T1}
RJ45
3.3V
Supply
Pin 21
(VDD33_IO)
100pF 1nF 10nF 10mF
Figure 3-1. Power Connections for Single Supply Operation
8
Hardware Configuration
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