Microchip Technology KSZ8061MNX User Manual

Schematic and Layouts
 2016 Microchip Technology Inc. DS50002449A-page 29
FIGURE A-4: BOARD SCHEMATIC 4 OF 4
VDDL_EN
3.3V
AVDDH
3.3V VDDIO
3.3V
5.0V
AVDDL
DVDDLVDDL
VDDL3.3V
5.0V 3.3V_U2
5.0V
3.3V VDDL
DC_IN_EXT 5V_HDR
EXT_GND
DC_IN
3.3V 3.3V_U2
3.3V
SIGD (3)
GND
Place GND test points evenly across PCB.
GND GNDGND
KSZ8061 Power
3.3V Power for KSZ8061MNX
VOUT = 1.24 X [ 1 + ( R114 / R115 ) ]
VOUT = 1.25 X [ 1 + ( R112 / R113 ) ]
VDDL Power for KSZ8061MNX
Open: Regulator enabled
Closed: Regulator controlled by SIGD pin of KSZ8061
3.3V Power for Second PHY (KSZ8081MNX)
Jumper
Closed: Second PHY (KSZ8081) is powered
Open: Second PHY is unpowered
3.3V VDDL
2.1mm Power
Jack
VOUT = 1.24 X [ 1 + ( R117 / R118 ) ]
Power source options:
DC_IN_EXT (J26) must be used for EMC testing.
5V_HDR (J44) may be used in non-EMC environment.
DC_IN_EXT:
Nominal: 5V
Maximum: 13V or limited by attached MII board
Jumper
Closed: KSZ8061 is powered
Open: KSZ8061 is unpowered
When using terminal block (3.3V only),
1. Remove JP1 and JP4 to disable LDOs U4 and U5.
2. Install R98.
TP1TP1
C5
2.2uF
C5
2.2uF
D2
LED - RED SMD
D2
LED - RED SMD
21
FB4
FBEAD
FB4
FBEAD
1 2
+
C1
220uF / 50V Elect
+
C1
220uF / 50V Elect
JP4 JUMPERJP4 JUMPER
R115
1.50K
R115
1.50K
FB3
FBEAD
FB3
FBEAD
1 2
C6
1uF
C6
1uF
U6
MIC5305_adj / MQF
U6
MIC5305_adj / MQF
EN
1
GND
2
VIN
3
VOUT
4
ADJ
5
BYP
6
+ C28
10uF Tant
+ C28
10uF Tant
JP1 JUMPERJP1 JUMPER
C25
10uF
C25
10uF
JP2 JUMPERJP2 JUMPER
J8
PWRJACK-TH
J8
PWRJACK-TH
1
3 2
R114
2.49K
R114
2.49K
FB1
FBEAD
FB1
FBEAD
1 2
R94 optR94 opt
+
C15
10uF Tant
+
C15
10uF Tant
JP3
3X1
JP3
3X1
1
2
3
TP3TP3
C56
1uF
C56
1uF
R99
4.7K
R99
4.7K
C60
2.2uF / 50V
C60
2.2uF / 50V
R117
2.49K
R117
2.49K
C54
1uF
C54
1uF
C58
1uF
C58
1uF
U5
MIC29302WU / TO-263-5
U5
MIC29302WU / TO-263-5
EN
1
VIN
2
GND
3
VOUT
4
ADJ
5
R116
220
R116
220
R112
1.50K
R112
1.50K
+ C19
10uF Tant
+ C19
10uF Tant
R46
4.7K
R46
4.7K
U4
MIC29302WU / TO-263-5
U4
MIC29302WU / TO-263-5
EN
1
VIN
2
GND
3
VOUT
4
ADJ
5
R98 optR98 opt
R95 optR95 opt
TP2TP2
R89
4.7K
R89
4.7K
+
C13
10uF Tant
+
C13
10uF Tant
TP12TP12
TP4TP4
J9
Term_Block_2
J9
Term_Block_2
1
2
C2
0.1uF
C2
0.1uF
R113
26.7K
R113
26.7K
+
C84
22uF Tant
+
C84
22uF Tant
L1
TDK ZJYS81
L1
TDK ZJYS81
1
2
4
3
C27
10uF
C27
10uF
TP33TP33
FB2
FBEAD
FB2
FBEAD
1 2
C72
1uF
C72
1uF
C77
2.2uF / 50V
C77
2.2uF / 50V
C81
1uF
C81
1uF
+
C14
10uF Tant
+
C14
10uF Tant
R118
1.50K
R118
1.50K
+
C85
22uF Tant
+
C85
22uF Tant
C83
1uF
C83
1uF

Microchip Technology KSZ8061MNX Specifications

General

Brand	Microchip Technology
Model	KSZ8061MNX
Category	Motherboard
Language	English