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Ethernet HUB(RTL8305N-CG)
Ethernet Power
+3.5V_ST_LAN
ETNHUB_DVDD33
ETNHUB_AVDD33
ETNHUB_DVDD33
L8403
L8401
BLM18PG121SN1D
BLM18PG121SN1D
C8422
C8419
C8425
0.1uF
0.1uF
22uF
16V
16V
10V
IC8400
MP20045DQ-LF-Z
ETNHUB_AVDD33
EP[GND]
R8407
VIN_1
EN
10K
1
8
C8400
R8408
2.2uF
VIN_2
PG
100K
25V
2
7
VOUT_1
GND
3
6
R8409
VOUT_2
FB
10K 1%
4
5
Vout
R2
R8406
R1
C8430
2K
2.2uF
1%
Vout=1.5*(1+R1/R2)
25V
ETNHUB_AVDD18
ETNHUB_DVDD18
C8406
C8410
0.1uF
0.1uF
THE
SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE
SYMBOL MARK OF THE SCHEMETIC.
Copyright
2014 LG Electronics Inc. All rights reserved.
Only for training and service purposes
ETNHUB_AVDD33
C8405
0.1uF
C8429
C8426
16V
0.1uF
0.1uF
16V
16V
ETNHUB_EPHY_RXIN1
ETNHUB_EPHY_RXIP1
LAN1
ETNHUB_EPHY_TXOP1
ETNHUB_EPHY_TXON1
ETNHUB_EPHY_TXON2
ETNHUB_EPHY_TXOP2
TO PHY Chip
ETNHUB_EPHY_RXIP2
ETNHUB_EPHY_RXIN2
ETNHUB_EPHY_RXIN3
LAN2
ETNHUB_EPHY_RXIP3
Differential 100 ohm
No Via
Close to
ETNHUB_DVDD18
ETNHUB_AVDD18
L8406
L8407
BLM18PG121SN1D
BLM18PG121SN1D
C8435
C8438
0.1uF
22uF
16V
10V
OPT
C8407
C8411
C8418
C8424
0.1uF
0.1uF
0.1uF
0.1uF
Xtal_matching
Xtal_matching
C8440-*1
C8441-*1
10pF
10pF
50V
50V
Place Close To RTL8305N
Xtal_OLD
Xtal_OLD
C8440
C8441
8pF
8pF
50V
50V
3
2
XTAL_2
GND_1
4
1
GND_2
XTAL_1
25MHz
X8400
R8422
1M
ETNHUB_AVDD18
OPT
ETNHUB_AVDD33
R8424
R8423
Place Close To RTL8305N
1.69K
270
1%
1%
1.96K
AVDD18_1
LED_ACT[0]/BCINDROP
1
36
TXON[1]
LED_ACT[1]/GYSPD100
2
35
THERMAL
TXOP[1]
LED_ACT[2]/P4ANEG
3
34
49
RXIP[1]
P4FLCTRL/CPU_INTT
R8440
4
33
IC8401
RXIN[1]
RESET
5
32
AVDD18_2
DVDD18_4
RTL8305N_REALTEK
6
31
RXIN[2]
LED_ACT[3]/EN48PASS1
7
30
RXIP[2]
LED_ACT[4]
8
29
TXOP[2]
DVDD33
9
28
TXON[2]
SDA_MDIO
10
27
R8434
TXON[3]
SCL_MDC
11
26
TXOP[3]
ENEEPROM
12
25
R8436
1K
LAN2
PHY TO RTL matching
TR0P
C8442
0.1uF
TR0N
C8443
0.1uF
TR1P
C8444
0.1uF
TR1N
C8445
0.1uF
Place to center position between two chips
ETNHUB_DVDD18
ETNHUB_DVDD33
LAN_ACT0
GYSPD
LAN_ACT2
100
ETNHUB_INT
Realtek WOL
R8452
22
/ETHERNET_RESET
RST_PHY_MICOM
R8449
22
/RST_PHY
LAN_ACT3
RST_PHY_CPU
33
EPHY_MDIO
R8435
33
EPHY_MDC
ETNHUB_DVDD33
EPHY_MDC
EPHY_MDIO
ETNHUB_AVDD18
L8408-*1
UBW2012-121F
SHENCHEN_NEW
L8408
MAG_NEW
ETNHUB_EPHY_TXOP2
R8416
49.9
C8446
R8417
0.1uF
49.9
ETNHUB_EPHY_TXON2
ETNHUB_EPHY_RXIP2
R8418
49.9
C8447
R8419
0.1uF
49.9
ETNHUB_EPHY_RXIN2
Place close to chip
xxLY960H-ZA
STRAPPING PIN CONFIG
LAN_ACT0
LAN_ACT2
LAN_ACT3
ETNHUB_ENDEFER
R8466
22
/ETHERNET_RESET
RST_PHY_MICOM
R8467
22
/RST_PHY
RST_PHY_CPU
GYSPD
LED_ACT[2]/P4ANEG : Auto-negotiation Enable/Disable
All Strapping Pins are internal pull-up
2014.06.23
HUB
84
LGE Internal Use Only
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