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VSC8221 Datasheet(PDF) 25 Page - Microsemi Corporation

Part # VSC8221
Description  Single Port 10/100/1000BASE-T PHY with1.25 Gbps SerDes for SFPs/GBICs
PDF  138 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8221 Datasheet(HTML) 25 Page - Microsemi Corporation

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VSC8221
Data Sheet
VMDS-10106 Revision 4.1
December 2006
25 of 26
26
Table 13. Power Supply and Ground Connections
100
TFBGA
BALL
Supply
Name
Recommended PCB
Power Plane
Type
Nominal
Supply
Voltage
(V)
Description
Digital i/O Power Supply Pins
H4
VDDiO1
1 The i/O power supplies on the PHY are separated on the chip itself to facilitate support for different VDDiO supply voltages. These VDDiO
supplies can be run independently at 2.5V OR 3.3V i/O.
V+iO
P
3.3V or
2.5V
Power for the RXLOS/SiGDET and
MODDEF0/CLKOUT pins
H8
VDDiOMiCRO1
V+iO
P
3.3V or
2.5V
Power for SMi and EEPROM interface
C4
VDDiOCTRL1
V+iO
P
3.3V or
2.5V
Power for JTAG i/O
Digital Core Power Supply Pins
G10,F3,G3,
F8,H7
VDD12
V+12
P
1.2V
Power for internal digital logic, PLL and
SerDes/SGMii i/O Power
Analog Power Pins
C8,D9
VDD33A
V+33A
P
3.3V
Power for MDi, CMODE, PLL, and LED
blocks
C9
VDDREG
V+33REG
P
3.3V
Power for on-chip switching regulator
E9
VDD12A
V+12A
P
1.2V
Power for internal PLL and ADC
Ground Pins
D4,D5,D6,
D7,E4,E5,
E6,E7,F4,
F5,F6,F7,
G4,G5,G6,
G7,C6,C7,
D8,E8,H6
VSS
GND
G
0V
Ground for all blocks
Table 14. No Connects
100 TFBGA
BALL
Signal Name
Type
Description
C1,D1,E1,
F1,G1,H1,
J1,K1,D2,
E2,F2,G2,
H2,J2,K2,
H3,J3,K3,
J4,K4,H5,
J5,K5,J6,K6
NC
NC
No Connect - must be left floating



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