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RTL8139C

REALTEK 3.3V SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT

Realtek Semiconductor 

RTL8139C(L)

5.4 Power Pins

Symbol

VDD

GND

Type

P

P

P

P

Pin No

1, 12, 25, 35, 46, 58,

59, 106, 109, 119

77, 90, 96

7, 18, 30, 40, 55, 56,

62, 111, 112, 113, 124

74, 80, 85, 93

Digital Power +3.3V

Analog Power +3.3V

Digital Ground

Analog Ground

Description

5.5 LED Interface

Symbol

LED0, 1, 2

Type

O

Pin No

99, 98, 97

LED pins

Description

LEDS1-0

LED0

LED1

LED2

00

Tx/Rx

LINK100

LINK10

01

Tx/Rx

LINK10/100

FULL

10

Tx

LINK10/100

Rx

During power down mode, the LEDs are OFF.

11

Tx

LINK100

LINK10

5.6 Attachment Unit Interface

Symbol

TXD+

TXD-

RXIN+

RXIN-

X1

X2

Type

O

O

I

I

I

O

Pin No

92

91

87

86

79

78

Description

100/10BASE-T transmit (Tx) Data

100/10BASE-T receive (Rx) Data

25 MHz Crystal/OSC. Input

Crystal Feedback Output: This output is used in crystal connection

only. It must be left open when X1 is driven with an external 25 MHz

oscillator.

5.7 Test and Other Pins

Symbol

RTT2-3

RTSET

NC

Type

TEST

I/O

-

Pin No

81, 82

84

54, 71, 72, 73, 94

Description

Chip test pins.

This pin must be pulled low by a 1.7KΩ resistor.

Reserved

2002/01/10

9

Rev.1.4

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