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LAN9115

Highly Efficient Single- Chip 10/100 Non-PCI Ethernet Controller

SMSC -> Microchip 

Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

Datasheet

Table 2.5 System and Power Signals (continued)

PIN

NO.

3,65

1,66

7

4

8

11

NAME

SYMBOL

BUFFER NUM

TYPE

PINS

DESCRIPTION

Core Voltage

VDD_CORE

P

Decoupling

Core Ground

GND_CORE

P

PLL Power

VDD_PLL

P

PLL Ground

VSS_PLL

P

Reference Power

VDD_REF

P

Reference Ground

VSS_REF

P

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. 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. 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 LAN9115

19

DATASHEET

Revision 1.1 (05-17-05)

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