TLK100_11 Datasheet, PDF (11/88 Pages) Texas Instruments – Industrial Temp, Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

TLK100
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1.8 V
Supply
Pin 41
(VDD33_V18)
Pin 40
(V18_PFBOUT)
Pin 2
(V18_PFBIN )
Pin 4
(V18_PFBIN2)
TLK100
Pin 5
(RD–)
Pin 6
(RD+)
Pin 8
(TD–)
Pin 9
(TD+)
49.9W
49.9W
SLLS931B – AUGUST 2009 – REVISED DECEMBER 2009
1.8V
Supply
1.8V
Supply
0.1mF
1:1
RD–
RD+
0.1mF*
49.9W
49.9W
1.8V
Supply
0.1mF
0.1mF*
TD–
1:1 T1
TD+
RJ45
Figure 2-2. Power Scheme for Operation With External 1.8V Supply
– External 1.1V rail – When external 1.1V rail is available – Connect the external 1.1V to the following
pins: VA11_PFBOUT (pin 10), VDD11 (pin 20), VA11_PFBIN1 (pin 1), VA11_PFBIN2 (pin 7),
VDD33_VA11 (pin 11) and VDD33_VD11 (pin 21) as shown in Figure 2-3:
1.1 V
Supply
Pin 11
(VDD33_VA11)
Pin 10
(VA11_PFBOUT)
TLK100
Pin 1
(VA11_PFBIN1)
Pin 7
(VA11_PFBIN2)
Pin 21
(VDD33_VA11)
Pin 20
(VDD11)
Figure 2-3. Power Scheme for Operation With External 1.1V Supply
• Lowest-power operation – When 1.1V and 1.8V supplies are already available in addition to 3.3V,
designers can take advantage of the lowest-power configuration of the TLK100. By supplying external
1.8 and 1.1V as explained above, all the internal regulators are powered down and the device is fully
driven by the external supplies giving the lowest power operation.
Copyright © 2009, Texas Instruments Incorporated
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Pin Descriptions
11