netboard-3p RTL8305NB sch

RTL8305NB 原理图

1

X'Former

POWERR8

VDCU2

VDD331 2 Vin Vout VSS CE NC 4 5C5 100uF/16V CE2\5 C6 0.1uF c0603

VDD33BT4 TXOP3 C30 1000pf C7 0.1uF c0603 C13 0.1uF c0805 C18 0.1uF c0603 C15 0.1uF c0603 C34 0.1uF c0603 C35 0.1uF c0603 C36 0.1uF c0603 GND c0603 RXIP3 TXON3 COMT3 RXIN3

1 2 3 4J3 CON4

1 3 4 5 7

16 14 13 12 10PM45-1040M

TX3+ TX3COMTB3 RX3RX3+ C38 68pF_2kv c1206 GND R21 33 r0603 RX3+ RX3TX3TX3+

J2 CON4

0 R0805

C2

C3 C4 100uF/16V CE2\5

3

R9 0 R0805

0.1uF 0.1uF c0603 c0603

1 2 3 4

COMT45

ME6211C33M5G SOT23-5 GND

GND

PHJ2 PHJ8x5

T3 RXIP2 VDD33 VDD10 C37 1000pf GND R5 0 r0603 R1 0 R1206 R2 0 R1206 R3 0 R1206 R4 0 r0603 VDD33A VDD33B R7 0 r0603 C19 0.1uF c0805 C20 0.1uF c0603 C21 0.1uF c0603 C22 0.1uF c0603 C23 0.1uF c0603 C24 0.1uF c0603 C25 0.1uF c0603 C33 0.1uF c0603 C29 1000pf GND GND c0603 RXIP1 c0603 TXOP2 TXOP1 TXON1 COMT2 RXIN1 RXIN2 COMT1 TXON2

1 2 3 4 5 6 7 8 9 10

20 RX2+ 19 18 17 16 15 14 13 12RX2COMTB1 TX2TX2+ TX1+ TX1COMTB2 RX1R19 33 r0603 C32 68pF_2kv c1206 GND R15 33 r0603 COMT48

RX2+ RX2TX2+ TX2-

Jumper

1 2 3 4 5 6 7 8

A1 A2 A3 A4 A5 A6 A7 A8

11 RX1+PM48-2064K

RX1+ RX1TX1+ TX1-

GND

9 10 11 12 13 14 15 16

B1 B2 B3 B4 B5 B6 B7 B8 NC2

VDD33

VDD10 RESETB Internal 3.3v to 1.0vA

P2LED VDD33 P3LED

VOUT

18

NC1

17

A

VDD33A

VDD10

VDD330.1uF C0603 4.7uF C0603 VDD33A

RESET

CIN1

CIN2

V10OUT DVDDL P4LED P3LED P2LED/DIS_RST_BLNK DVDDH P1LED P0LED/DIS_EEE LDIND/DIS_LD RESETB SDA/MDIO SCL/MDC

36 35 34 33 32 31 30 29 28 27 26 25

U1

R11 470K r0603 RESETB P2LED R30 330 r0603

GND VDD10

VDD33B XO XI IBREF

Close to 05NB

R6 2.49K_1% r0603

VDD33B

37 38 39 40 41 42 43 44 45 46 47 48

V33IN AVDDHPLL XO X1 AVDDLPLL IBREF AVDDL RXIP0 RXIN0 TXON0 TXOP0 AVDDH

RTL8305NBAVDDL RXIP1 RXIN1 TXON1 TXOP1 AVDDH DVDDL AVDDH TXOP2 TXON2 RXIN2 RXIP2

DVDDL AVDDL RXIP4 RXIN4 TXON4 TXOP4 AVDDH TXOP3 TXON3 RXIN3 RXIP3 AVDDL

24 23 22 21 20 19 18 17 16 15 14 13

C14 0.1uF c0603 VDD33B GND TXOP3 TXON3 RXIN3 RXIP3

1D6 LED GND

Port 2 LED2

Layout Note:

CLOCKP3LED R31 330 r0603

GND

49

E_PAD

Place crystal as close to 8305NB as possibleRTL8305NB_QFN48 Y1 XI

1 2 3 4 5 6 7 8 9 10 11 12

GND

VDD33B

1D7 LED GND

1

225MHz C12 27pF c0603 GND

XO

RXIP1 RXIN1 TXON1 TXOP1

TXOP2 TXON2 RXIN2 RXIP2

C11 27pF c0603 GND

Port 3 LED2Title netboard-3p Size Date: Document Number Sheet 1 of 1 Rev A.0