Avago Technologies PEX 8605 - Manual (Page 2)

PEX8605
© PLX Technology, www.plxtech.com Page 2 of 13 2 May 2013, version 1.7
2.3 Power, Ground Pin Connections
Signal Name Dual-Row
QFN Pkg.
Pin #
TQFP
Package
Pin # Signal
Type Checked Recommendations
IO Power Pins (2.5 or 3.3 V)
In the simplest applications, all pins in this group
can be powered from a common 2.5 V or 3.3 V
DC voltage source. All pins in this group must be
at the same voltage. See the PEX8605 RDK
schematic for a reference circuit, including
recommended bypass cap network.PEX8605
PEX_VDDA_P0
PEX_VDDA_P1
PEX_VDDA_P2
PEX_VDDA_P3
B8
B13
B44
B50
14
26
101
114
APWR
YES
NO
UNKNOWN
Power for SerDes Analog Circuits (4 Pins)
Power for these pins should be filtered from the
main IO supply, VDD_IO. See the PEX8605
RDK schematic for a reference circuit.
Note: If stand-by power (D3cold) is implemented,
power for these pins should be filtered from the
auxiliary power supply, VAUX_IO.
VDD_IO
A30, A43, B3,
B31, B41
3, 4, 56, 70,
84, 92
IOPWR
YES
NO
UNKNOWN
Power for Digital IO Circuits (5 Pins)
Main supply for digital IO circuits.
Important Note: Data Sheet version 1.2 corrects
pins A26 and B19 as VAUX_IO. Designs
powering VDD_IO and VAUX_IO supplies
separately may be impacted by this change.
VAUX_IO
A18, A26, A64,
B19
33, 42, 49, 127
IOPWR
YES
NO
UNKNOWN
Auxiliary Power Supply (4 Pins)
If stand-by power is implemented, this power
supply should be derived from Vaux (3.3V).
Otherwise, connect these pins to the VDD_IO
supply.
Core Logic, SerDes, and PLL Power Pins
In the simplest applications, all 1.0 V supply pins
can be powered from a common 1.0 V DC voltage
source. See the PEX8605 RDK schematic for a
reference circuit.
PEX_VDDD0_P0
PEX_VDDD0_P1
PEX_VDDD0_P2
PEX_VDDD0_P3
PEX_VDDD1_P0
PEX_VDDD1_P1
PEX_VDDD1_P2
PEX_VDDD1_P3
B7
B12
B45
B51
A7
A13
B46
B52
12
24
103
116
9
21
106
119
DPWR
YES
NO
UNKNOWN
1.0 V Power for SerDes Digital Circuits (8
Pins)
Power for these pins should be filtered from the
main 1.0 V supply, VDD_CORE. See the PEX
8603 RDK schematic for a reference circuit.
Note: If stand-by power (D3cold) is implemented,
power for these pins should be filtered from the
auxiliary power 1.0V supply, VAUX_CORE.