TLK105LRHBR datasheet(7/105 Pages) TI1

Part #	TLK105LRHBR

Description	Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer Transceiver

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Manufacturer	TI1 [Texas Instruments]

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TLK105L

TLK106L

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SLLSEE3A – AUGUST 2013 – REVISED NOVEMBER 2013

2.8

Power and Bias Connections

TYPE

DESCRIPTION

NAME

NO.

RBIAS

16

I

Bias Resistor Connection: Use a 4.87k

Ω 1% resistor connected from RBIAS to GND.

PFBOUT

15

O

Power Feedback Output: Place 10µf and 0.1

μF capacitors (ceramic preferred) close to PFBOUT.

In single-supply operation, connect this pin to PFBIN1 and PFBIN2 (pin 13 and pin 24). See Figure 3-1

for proper placement.

In multiple supply operation, this pin is not used.

Power Feedback Input: These pins are fed with power from PFBOUT (pin 15) in single supply

PFBIN1

13

operation.

I

In multiple supply operation, connect a 1.55V external power supply to these pins. Connect a small

PFBIN2

24

capacitor of 0.1µF close to each pin. To power down the internal linear regulator, write to register

0x00d0.

VDD_IO

21

P

I/O 3.3V, 2.5V, or 1.8V Supply - For details, see Section 3.2.3

AVDD33

14

P

Analog 3.3V power supply

Ground

Ground Pad

GND

P

Pad

Pin Descriptions

7

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