TLK100_11 Datasheet, PDF (9/88 Pages) Texas Instruments – Industrial Temp, Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

TLK100
www.ti.com
2.8 10 Mb/s and 100 Mb/s PMD Interface
SLLS931B – AUGUST 2009 – REVISED DECEMBER 2009
PIN
NAME
NO.
TD–, TD+ 8, 9
RD–, RD+ 5, 6
TYPE
DESCRIPTION
Differential common driver transmit output (PMD Output Pair). These differential outputs are automatically
configured to either 10BASE-T or 100BASE-TX signaling.
I/O
In Auto-MDIX mode of operation, this pair can be used as the Receive Input pair. These pins require 1.8V
or 3.3V bias for operation.
Differential receive input (PMD Input Pair). These differential inputs are automatically configured to accept
either 100BASE-TX or 10BASE-T signaling.
I/O
In Auto-MDIX mode of operation, this pair can be used as the Transmit Output pair. These pins require
1.8V or 3.3V bias for operation.
2.9 Power and Bias Connections
PIN
NAME
TYPE
NO.
DESCRIPTION
RBIAS
3
I Bias Resistor Connection. Use a 4.99kΩ 1% resistor connected from RBIAS to GND.
V18_PFBOUT
40
O
1.8V Power Feedback Output. A 1μF capacitor (ceramic preferred), should be placed close to the
V18_PFBOUT.
In single supply operation, connect this pin should be connected to V18_PFBIN1 and V18_PFBIN2 (pin
2 and pin 4). See Figure 2-1 for proper placement pin.
In multiple supply operation, when supplying 1.8V from external supply, this pin should be connected
together with VDD33_V18 (pin 41), V18_PFBIN1 and V18_PFBIN2 (pin 2 and pin 4) to the 1.8V external
supply source. See Figure 2-2 for proper placement pin.
VA11_PFBOUT 10
O
1.1V Analog Power Feedback Output. A 1 μF capacitor (Ceramic preferred), should be placed close to
the VA11_PFBOUT.
In single supply operation this pin should be connected to VA11_PFBIN1 and V11_PFBIN2 (pin 1 and
pin 7). See Figure 2-1 for proper placement pin.
In multiple supply operation, when supplying 1.1V from external supply, this pin should be connected
together with VDD33_VA11 (pin 11), V11_PFBIN1 and V11_PFBIN2 (pin 1 and pin 7) to 1.1V external
supply source. See Figure 2-3 for proper placement pin.
V18_PFBIN1
2
1.8V Power Feedback Input. These pins are fed with power from V18_PFBOUT (pin 40) in single supply
operation.
I
V18_PFBIN2
4
1.8V from external source in multiple supply operation. A small 1μF capacitor should be connected close
to each pin.
VA11_PFBIN1
1
VA11_PFBIN2
7
1.1V Analog Power Feedback Input. These pins are fed with power from: VA11_PFBOUT (pin 10) in
single supply operation.
I
1.1V from external source in multiple supply operation. A small capacitor of 0.1 μF should be connected
close to each pin.
VDD11
20
O 1.1V Core Power Output. A capacitor of 1μF (Ceramic preferred) , should be placed close to the VDD11
VDD33_IO
17
P I/O 3.3V Supply
29
External supply input to 1.1V analog regulator
VDD33_VA11
11
P This pin should be connected to 3.3V or 2.5V external supply, in single supply operation.
In multiple supply operation this pin should be connected to external 1.1V supply source.
VDD33_V18
External supply input to 1.8V regulator
41
P In single supply operation, this pin should be connected to a 3.3V or 2.5V external supply. In multiple
supply operation this pin should be connected to an external 1.8V supply source.
External supply input to 1.1V Core regulator
VDD33_VD11
21
P This pin should be connected to 3.3V or 2.5V external supply, in single supply operation.
In multiple supply operation this pin should be connected to external 1.1V supply source.
VSS
38
P Ground pin for Oscillator
GNDPAD
49
P Ground Pad
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Pin Descriptions
9