LAN9117_08 Datasheet, PDF (19/136 Pages) SMSC Corporation – High Performance Single-Chip 10/100 Non-PCI Ethernet Controller

High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
Table 2.5 System and Power Signals (continued)
PIN
NO.
NAME
SYMBOL
BUFFER NUM
TYPE
PINS
DESCRIPTION
19,27,
I/O Ground
GND_IO
P
34,41,
47,54,
60,96
81,85,
+3.3V Analog
VDD_A
P
89
Power
77,80, Analog Ground
VSS_A
P
86,88
3,65
Core Voltage
VDD_CORE
P
Decoupling
1,66
Core Ground
GND_CORE
P
7
PLL Power
VDD_PLL
P
4
PLL Ground
VSS_PLL
P
8
Reference Power
VDD_REF
P
11 Reference Ground
VSS_REF
P
8
Ground for I/O pins
3
+3.3V Analog power supply pins. See
Note 2.1
4
Ground for analog circuitry
2
1.8 V from internal core regulator.
Both pins must be connected
together externally and then tied to a
10uF 0.1-Ohm ESR capacitor, in
parallel with a 0.01uF capacitor to
Ground next to each pin. These pins
must not be used to supply power to
other external devices. See Note 2.1
2
Ground for internal digital logic
1
1.8V Power from the internal PLL
regulator. This external pin must be
connected to a 10uF 0.1-Ohm ESR
capacitor, in parallel with a 0.01uF
capacitor to Ground. This pin must
not be used to supply power to other
external devices. See Note 2.1
1
GND for the PLL
1
Connected to 3.3v power and used
as the reference voltage for the
internal PLL
1
Ground for internal PLL reference
voltage
Note 2.1
Please refer to the SMSC application note AN 12.5 titled “Designing with the LAN9118 -
Getting Started”. It is also important to note that this application note applies to the whole
SMSC LAN9118 family of Ethernet controllers. However, subtle differences may apply.
SMSC LAN9117
19
DATASHEET
Revision 1.5 (07-11-08)